Configuring Digital Subscriber Lines

Table Of Contents

Configuring Digital Subscriber Lines

Configuring Line Card Elements

Enabling and Disabling a Port

Assigning Port Names

Assigning Circuit IDs

Displaying Debugging Information for a Port

Configuring a Slot

Using DSL Profiles

Creating, Modifying, or Deleting a Profile

Copying a Profile

Attaching or Detaching a Profile

Displaying a Profile

Displaying DSL Profiles

Setting DSL Profile Parameters

Enabling and Disabling Alarms

Enabling and Disabling Payload Scrambling

Setting CAP Upstream and Downstream Baud Rates

Setting Upstream and Downstream Bit Rates

Setting Signal-to-Noise Ratio Margins

Setting the Interleaving Delay

Setting the Number of Symbols Per Reed-Solomon Codeword

Setting FEC Check (Redundancy) Bytes

Enabling and Disabling Trellis Coding

Setting the Overhead Framing Mode

Modifying the Operating Mode

Modifying the Training Mode

Setting the Power Spectral Density Mask

Setting the ATU-C CAP CPE-Signature

Running the Chipset Self-Test

Enabling and Disabling ATM Local Loopback

Displaying DSL and ATM Status

Displaying Hardware Information

Configuring Digital Subscriber Lines

This chapter describes how to configure Cisco Digital Subscriber Line Access Multiplexers (DSLAMs) with NI-2 for digital subscriber line (DSL) service. The chapter contains the following sections:

• Configuring Line Card Elements

– Enabling and Disabling a Port

– Assigning Port Names

– Assigning Circuit IDs

– Displaying Debugging Information for a Port

– Configuring a Slot

• Using DSL Profiles

– Creating, Modifying, or Deleting a Profile

– Copying a Profile

– Attaching or Detaching a Profile

– Displaying a Profile

– Displaying DSL Profiles

• Setting DSL Profile Parameters

– Enabling and Disabling Alarms

– Enabling and Disabling Payload Scrambling

– Setting CAP Upstream and Downstream Baud Rates

– Setting Upstream and Downstream Bit Rates

– Setting Signal-to-Noise Ratio Margins

– Setting the Interleaving Delay

– Setting the Number of Symbols Per Reed-Solomon Codeword

– Setting FEC Check (Redundancy) Bytes

– Enabling and Disabling Trellis Coding

– Setting the Overhead Framing Mode

– Modifying the Operating Mode

– Modifying the Training Mode

–

– Disabling Bitswapping, page 7-40

– Setting the Power Spectral Density Mask

– Setting the ATU-C CAP CPE-Signature

• Enabling and Disabling ATM Local Loopback

• Displaying DSL and ATM Status

• Displaying Hardware Information

Configuring Line Card Elements

The following sections discuss configuring ports and slots on line cards.

Enabling and Disabling a Port

This section describes how to enable or disable a port.

To enable a port, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#interface atm slot/port

Go to the interface configuration mode and specify the port you want to enable.

3.

DSLAM(config-if)#no shutdown

Enable the specified port.

To disable a port, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#interface atm slot/port

Go to the interface configuration mode and specify the port you want to disable.

3.

DSLAM(config-if)#shutdown

Disable the specified port.

Example

This example enables port 20 on slot 0 and displays the results:

DSLAM#configure terminal
DSLAM(config)#interface atm 20/0
DSLAM(config-if)#no shutdown
DSLAM(config-if)#end
DSLAM#show dsl interface atm 20/0
Port Status:
Subscriber Name: Circuit ID:
IOS admin: UP oper: UP Card status: Present
Last Change: 36352 days, 13 hrs, 51 min, 47 sec No. of changes: 0
Line Status: TRAINED
Test Mode: NONE

ADSL Chipset Self-Test: NONE

CO Modem Firmware Version: 0x1319BE02
.
.
.

Note The admin status is modified by the shutdown and no shutdown commands. The oper (operational) status is a function of the ATM switch fabric and the DSL line state.

Assigning Port Names

This section describes how to assign a name to a DSL subscriber port. The name may contain up to 64 printable characters. Alphanumerics and most special characters (underscores, hyphens, and ampersands, for example) are allowed. Spaces and quotes are not allowed.

To assign a name to a DSL subscriber port, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#interface atm slot/port

Specify the slot and port.

3.

DSLAM(config-if)#dsl subscriber name

Assign name to the port.

Example

In this exmple, the name "curley" is assigned to slot 9, port 2.

DSLAM#configure terminal
DSLAM(config)#interface atm 9/2
DSLAM(config-if)#dsl subscriber curley

Assigning Circuit IDs

This section describes how to assign an identifier to a DSL circuit. The circuit ID may contain up to 32 printable characters. Alphanumerics and most special characters (underscores, hyphens, and ampersands, for example) are allowed. Spaces and quotes are not allowed.

To assign an identifier to a DSL circuit, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#interface atm slot/port

Specify the slot and port.

3.

DSLAM(config-if)#dsl circuit circuit-id

Assign circuit-id to the port.

Example

In this example, the circuit ID 341 is assigned to slot 9, port 2.

DSLAM#configure terminal
DSLAM(config)#interface atm 9/2
DSLAM(config-if)#dsl circuit 341

Displaying Debugging Information for a Port

This section describes how to display debugging information for a port.

To display debugging information for a port, follow this step:

Step

Command

Task

1.

DSLAM#show controller atm slot/port

Display debugging information for the selected port.

Command output includes

•Absolute SNR for each of the 32 upstream bins.

•Bit allocation for each of the 32 upstream bins.

•Configured and actual downstream transmit power boost. Configured powerboost displays in integer dB. Actual power boost displays in dB to one decimal place (0.1 dB) accuracy.

•Contents of the these chipset CMVs:

–UOPT[7 : 0] (Upstream training options)

–DOPT[7 : 0] (Downstream training options)

–ADPT.downstream

–ADPT.upstream

–RATE.actual

–RATE.maximum

–CODE.upstream

–CODE.downstream

–INTL.upstream

–INTL.downstream

–DIAG.control

–DIAG.flags_latched

–PSDM.config

–PSDM.actual

–OPTN.options

–OPTN.bitswap

–OPTN.utopia

Example

This example displays debugging information for slot 0, port 1:

DSLAM#show controller atm 20/1
ATM 20/1

Upstream SNR (in Tenths of dB)
Sub Channel SNR Sub Channel SNR
0 0 16 0
1 0 17 0
2 0 18 0
3 0 19 0
4 0 20 0
5 0 21 0
6 0 22 0
7 0 23 0
8 0 24 0
9 0 25 0
10 0 26 0
11 0 27 0
12 0 28 0
13 0 29 0
14 0 30 0
15 0 31 0

Upstream Bit Allocation
Sub Channel Bits Allocated Sub Channel Bits Allocated
0 0 16 0
1 0 17 0
2 0 18 0
3 0 19 0
4 0 20 0
5 0 21 0
6 0 22 0
7 0 23 0
8 0 24 0
9 0 25 0
10 8 26 0
11 0 27 0
12 0 28 0
13 3 29 0
14 0 30 0
15 0 31 0

Upstream TX Gain (in Tenths of dB)
Sub Channel TX Gain Sub Channel TX Gain
0 0 16 0
1 0 17 0
2 0 18 0
3 0 19 0
4 0 20 0
5 0 21 0
6 0 22 0
7 0 23 0
8 0 24 0
9 0 25 0
10 0 26 0
11 0 27 0
12 0 28 0
13 0 29 0
14 0 30 0
15 0 31 0

Downstream Bit Allocation
0 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240
-------------------------------------------------------------------------------
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Downstream TX Gain (in Tenths of dB)
0 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240
-------------------------------------------------------------------------------
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Configuring a Slot

To configure a slot for a specific card type, use these commands:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#slot slot# cardtype

Configure the slot# to the desired cardtype.

The slot number range varies by platform; the maximum range is 1 to 38. These card types are available:

•ATUC-1-4DMT—4-port DMT card

•ATUC-1-4DMT-I—4-port DMT over ISDN card

•ATUC-4FLEXICAP—4-port Flexi card configured as CAP

•ATUC-4FLEXIDMT—4-port Flexi card configured as DMT

•ITUC-1-8IDSL—8-port IDSL card

•STUC-4-2B1Q-DIR-1—4-port SDSL card

•ATUC-8-DMT-1-H—8-port DMT OSP card

•STUC-8-TCPAM—G.SHDSL card

Note Some line cards do not function in all NI-2 DSLAM systems. For example, the Cisco 6100 system supports only a dual-port CAP ATU-C line card. Consult the hardware documentation for your DSLAM to determine which line cards it supports.

Example

This example configures slot 12 for a 4-port SDSL card and displays the hardware associated with the slot.

DSLAM#configure terminal
DSLAM(config)#slot 12 STUC-4-2B1Q-DIR-1
DSLAM#exit
DSLAM#show hardware slot 12

Slot 12: STUC-4-2B1Q-DIR-1

Hardware Revision : 2.0
Part Number : 800-07416-02
Board Revision : A0
Deviation Number : 0-0
Fab Version : 02
PCB Serial Number : FX900561224
RMA Test History : 00
RMA Number : 0-0-0-0
RMA History : 00
CLEI Code : VALITKFBAC
Asset Identifier :
Platform features : 48 79 AD 35 56 41 4C 49
54 4B 46 42 41 43 BC C1
7B 12 41 E8 E1 85 0C 41
EEPROM format version 4
EEPROM contents (hex):
0x00: 04 FF 40 01 D6 41 02 00 C0 46 03 20 00 1C F8 02
0x10: 42 41 30 80 00 00 00 00 02 02 C1 8B 46 58 39 30
0x20: 30 35 36 31 32 32 34 03 00 81 00 00 00 00 04 00
0x30: C6 8A 56 41 4C 49 54 4B 46 42 41 43 CC 20 00 00
0x40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C9 18
0x60: 48 79 AD 35 56 41 4C 49 54 4B 46 42 41 43 BC C1
0x70: 7B 12 41 E8 E1 85 0C 41 FF FF FF FF FF FF FF FF

If the detected card type matches the slot provisioning for ATU-C and STU-C, the card type displays. The word "Missing" displays when a provisioned slot is empty.

"Mismatch" displays if the card type does not match the slot provisioning.

Note If you attempt to provision an empty slot, the major alarm "MODULE-MISSING" asserts.

Mixing Line Cards

The line coding used by the 4-port Flexi line card is spectrally incompatible with the line coding for both the 8-port IDSL line card and the 4-port SDSL (STU-C) line card. If you install spectrally incompatible cards in the same side of the chassis, the lines served by those cards can suffer reduced performance. For best performance in a chassis with a mixture of line card types, always install Flexi cards on one side of the chassis and install IDSL and SDSL cards on the opposite side.

Errors

Card mismatch error conditions occur under the following circumstances:

•If a line card of a different type is already installed in the named slot

•If you provision a slot for one type of card and insert another type of card into the named slot

Note You must provision an ATU-C FLEXI for CAP or DMT line coding before it will operate.

Using DSL Profiles

With the exception of a few dynamic operational modes, port configuration takes place through a configuration profile rather than by direct configuration. A profile is a named list of configuration parameters with a value assigned to each parameter. You can change the value of each parameter in the profile. To configure a subscriber, you need only attach the desired profile to that subscriber. When you change a parameter in a profile you change the value of that parameter on all ports using that profile. If you want to change a single port or a subset of ports, you can copy the profile, change the desired parameters, and then assign the new profile to the desired ports.

Note If you modify an existing profile, that change takes effect on every asymmetric digital subscriber line (ADSL) port linked to that profile.

This profile configuration approach is consistent with ADSL management information base (MIB) standards.

The DSLAM implementation uses the dynamic profile approach as opposed to the static profile approach. The dynamic profile approach supports a many-to-one correspondence between ports and profiles; that is, multiple ports can share the same profile but not vice versa. Also, with the dynamic approach, profiles are created and destroyed dynamically (with the exception of a special profile named "default"). Direct configuration of port parameters is not allowed.

Every port is attached to a special profile that is named "default." You can modify the "default" profile (but not delete it). This is useful when you want to modify one or two default parameters and apply this to every port in the system (rather than creating a new profile with minor changes and attaching this to every port in the system).

Note When you create a profile, it inherits all of the configuration settings of the special profile named "default" at the time of creation. If you subsequently modify the special profile "default," the changes do not propagate to profiles created using the original default profile.

Using profiles introduces a new command mode, profile mode. Use the command dsl-profile to enter profile mode. When you are in profile mode, changes you make to parameters affect only the profile you specify.

The following example sets the interleaved forward explicit congestion (FEC) check bytes for a profile named "test" to 6 upstream and 4 downstream. Other profiles do not change:

DSLAM#configure terminal
DSLAM(config)#dsl-profile test
DSLAM(cfg-dsl-profile)#dmt bitrate interleaved downstream 4 upstream 6
Creating, Modifying, or Deleting a Profile

This section describes how to create or delete a profile, and how to select a profile for modification.

To create a profile, or to select a profile for modification, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Create a profile named profile-name, or select an existing profile named profile-name for modification.

To delete a profile, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#no dsl-profile profile-name

Deleted profile-name.

Note You can modify the default profile, but you cannot delete it.

Examples

The following example creates a DSL profile named "fast2." After you execute these steps, you can modify the parameters for this profile:

DSLAM#configure terminal
DSLAM(config)#dsl-profile fast2
DSLAM(cfg-dsl-profile)#

This example modifies the default profile and displays the results:

DSLAM#configure terminal
DSLAM(config)#dsl-profile default
DSLAM(cfg-dsl-profile)#alarms
DSLAM(cfg-dsl-profile)#exit
DSLAM(config)#exit
DSLAM#show dsl profile default

Link Traps Enabled: NO
Alarms Enabled: NO
ATM Payload Scrambling: Enabled

DMT profile parameters
Maximum Bitrates:
Interleave Path: downstream: 640 kb/s, upstream: 128 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Minimum Bitrates:
Interleave Path: downstream: 0 kb/s, upstream: 0 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Margin: downstream: 6 dB, upstream: 6 dB
Interleaving Delay: downstream: 16000 usecs, upstream: 16000 usecs
Check Bytes (FEC):
Interleave Path: downstream: 4, upstream: 6
Fast Path: downstream: 0, upstream: 0
R-S Codeword Size: downstream: auto, upstream: auto
Trellis Coding: Disabled
Overhead Framing: Mode 3
Operating Mode: Automatic
Training Mode: Quick
Minrate blocking: Disabled
SNR Monitoring: Disabled
.
.
.

Copying a Profile

To copy a profile to an identical profile with a different name, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-copy-profile [force] source source-profile destination new-profile

Copy the profile named source-profile to a profile named new-profile

If the destination profile indicated in this command does not exist, dsl-copy-profile creates it. The command then copies all non-default configurations defined for the source profile to the destination profile.

Example

This example copies the default profile to a profile named "fast" and displays the results. If "fast" does not exist, the command creates it. Use the command show dsl profile to confirm the existence and parameters for the new profile:

DSLAM#configure terminal
DSLAM(config)#dsl-copy-profile force source default destination fast
DSLAM(config)#exit
DSLAM#show dsl profile fast
dsl profile fast:
Link Traps Enabled: NO
Alarms Enabled: NO
ATM Payload Scrambling: Enabled
DMT profile parameters
Maximum Bitrates:
Interleave Path: downstream: 8032/kbs, upstream: 480/kbs
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Minimum Bitrates:
Interleave Path: downstream: 0 kb/s, upstream: 0 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Margin: downstream: 6 dB, upstream: 6 dB
Interleaving Delay: downstream: 16000 usecs, upstream: 16000 usecs
Check Bytes (FEC):
Interleave Path: downstream: 16, upstream: 16
Fast Path: downstream: 0, upstream: 0
R-S Codeword Size: downstream: auto, upstream: auto
Trellis Coding: Disabled
Overhead Framing: Mode 3
Operating Mode: Automatic
Training Mode: Quick
Minrate blocking: Disabled
SNR Monitoring: Disabled

SDSL profile parameters
.
.
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Attaching or Detaching a Profile

This section describes how to attach or detach a profile to or from a slot or port.

To attach a profile from a slot or port, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#interface atm slot/port

Go to the interface configuration mode and specify the slot/port to which you want to attach the profile.

3.

DSLAM(config-if)#dsl profile profile-name

Attach profile-name to the slot/port.

To detach a profile from a slot or port, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#interface atm slot/port

Go to the interface configuration mode and specify the slot/port from which you want to detach the profile.

3.

DSLAM(config-if)#no dsl profile profile-name

Detach profile-name from the specified slot/port.

Example

This example attaches the profile "test1" to slot 20, port 1, and displays the results:

DSLAM#configure terminal
DSLAM(config)#interface atm 20/1
DSLAM(config-if)#dsl profile test1
DSLAM(config-if)#exit
DSLAM(config)#exit
DSLAM#show dsl interface atm 20/1
Port Status:
Subscriber Name: Circuit ID:
IOS admin: UP oper: UP Card status: Present
Last Change: 36352 days, 13 hrs, 51 min, 47 sec No. of changes: 0
Line Status: TRAINED
Test Mode: NONE

ADSL Chipset Self-Test: NONE

CO Modem Firmware Version: O.21

Configured:
DMT Profile Name: fast
Link Traps Enabled: NO
Alarms Enabled: NO
ATM Payload Scrambling: Enabled
.
.
.
Displaying a Profile

To display a profile and all the ports currently connected to it, follow this step:

Step

Command

Task

1.

DSLAM#show dsl profile profile-name

Display a profile and all the ports currently connected to it.

Note If you omit the profile-name argument, this command displays profile information for all existing DSL profiles.

Example

This example displays the profile "fast":

DSLAM#show dsl profile fast

dsl profile fast:
Link Traps Enabled: NO
Alarms Enabled: YES
ATM Payload Scrambling: Enabled

DMT profile parameters
Maximum Bitrates:
Interleave Path: downstream: 640 kb/s, upstream: 128 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Minimum Bitrates:
Interleave Path: downstream: 0 kb/s, upstream: 0 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Margin: downstream: 6 dB, upstream: 6 dB
Interleaving Delay: downstream: 16000 usecs, upstream: 16000 usecs
Check Bytes (FEC):
Interleave Path: downstream: 16, upstream: 16
Fast Path: downstream: 0, upstream: 0
R-S Codeword Size: downstream: auto, upstream: auto
Trellis Coding: Disabled
Overhead Framing: Mode 3
Operating Mode: Automatic
Training Mode: Quick
Minrate blocking: Disabled
SNR Monitoring: Disabled

SDSL profile parameters
.
.
.
Displaying DSL Profiles

To display all nondefault settings for each currently defined DMT profile, including the default profile, follow this step:

Step

Command

Task

1.

DSLAM#show running-config

Display all nondefault settings for each currently defined DMT profile, including the default DMT profile.

Example

This example shows how to display a running configuration:

DSLAM#show running-config
Current configuration : 12125 bytes
!
version 12.1
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname DSLAM
!
boot system flash:ni2-dsl-mz.v121_7_da.20010416
slot 1 ATUC-1-4DMT
slot 2 ATUC-1-4DMT
slot 3 ATUC-1-4DMT
slot 4 ATUC-1-4DMT
slot 5 ATUC-1-4DMT
slot 6 ATUC-1-4DMT
slot 7 ATUC-1-4DMT
slot 8 ATUC-1-4DMT
slot 9 ATUC-4FLEXIDMT
slot 10 NI-2-DS3-T1E1
slot 12 STUC-4-2B1Q-DIR-1
slot 13 ATUC-4FLEXIDMT
slot 14 STUC-4-2B1Q-DIR-1
slot 15 STUC-4-2B1Q-DIR-1
slot 16 STUC-4-2B1Q-DIR-1
slot 17 STUC-4-2B1Q-DIR-1
slot 18 ATUC-1-DMT8
slot 19 ATUC-1-4DMT
slot 20 ATUC-1-DMT8
slot 21 ATUC-1-4DMT
slot 22 STUC-4-2B1Q-DIR-1
slot 23 ATUC-1-4DMT
slot 24 ATUC-1-4DMT
slot 25 ATUC-1-4DMT
slot 26 ATUC-1-4DMT
slot 27 ATUC-4FLEXIDMT
slot 28 ATUC-1-4DMT
slot 29 ATUC-1-DMT8
slot 30 ATUC-1-4DMT
slot 31 STUC-8-TCPAM
slot 32 ATUC-1-4DMT-I
no logging console
enable password cisco
!
!
!
!
!
!
dsl-profile default
!
dsl-profile brent
dmt overhead-framing mode1
dmt encoding trellis
dmt margin downstream 4 upstream 4
dmt bitrate maximum interleaved downstream 1024 upstream 384
!
dsl-profile fast
!
dsl-profile ADSL-Plus
dmt bitrate maximum interleaved downstream 512 upstream 160
!
dsl-profile residencial
dmt codeword-size downstream 16 upstream 16
dmt bitrate maximum interleaved downstream 256 upstream 160
!
!
atm oam max-limit 1600
no atm oam intercept end-to-end
atm address 47.0091.8100.0000.0001.64ff.a980.0001.64ff.a980.00
atm router pnni
no aesa embedded-number left-justified
node 1 level 56 lowest
redistribute atm-static
!
atm ni2-switch trunk ATM0/IMA0
!
icm size 4194304
!
!
interface ATM0/0
no ip address
atm maxvp-number 0
atm maxvc-number 4096
atm maxvci-bits 12
!
interface Ethernet0/0
ip address 172.21.186.145 255.255.255.192
!
interface ATM0/2
no ip address
no atm ilmi-keepalive
atm oam 0 5 seg-loopback
atm oam 0 16 seg-loopback
clock source loop-timed
framing crc4
lbo short gain10
ima-group 0
!
.
.
.

Setting DSL Profile Parameters

This section describes the various parameters that can be set within a DSL profile.

Enabling and Disabling Alarms

You can enable and disable alarms for a selected DSL profile using a single command. The alarms apply to these event classes:

•Near End LOS (loss of signal)

•Near End LOCD (loss of cell delineation)

•Near End LOF (loss of frame)

•ATU-C DMT port failure

•Up and/or downstream bit rate not above minimum bit rate

DSL alarms are disabled by default.

To enable DSL alarms, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Specify a profile.

3.

DSLAM(cfg-dsl-profile)#alarms

Enable alarms for that profile.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

To disable DSL alarms, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Specify a profile.

3.

DSLAM(cfg-dsl-profile)#no alarms

Disable alarms for that profile.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

Example

This example enables alarms for the default profile and displays the results:

DSLAM#configure terminal
DSLAM(config)#dsl-profile default
DSLAM(cfg-dsl-profile)#alarms
DSLAM(cfg-dsl-profile)#end
DSLAM#show dsl profile default

dsl profile default:
Link Traps Enabled: NO
Alarms Enabled: YES
ATM Payload Scrambling: Enabled

DMT profile parameters
Maximum Bitrates:
Interleave Path: downstream: 640/kbs, upstream: 128/kbs
Minimum Bitrates:
Interleave Path: downstream: 0/kbs, upstream: 0/kbs
.
.
.
Enabling and Disabling Payload Scrambling

This section describes how to enable and disable cell payload scrambling on a DMT subscriber port. Payload scrambling is enabled by default.

To enable payload scrambling, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Specify the profile-name for which you want to enable payload scrambling.

3.

DSLAM(cfg-dsl-profile)#payload-scrambling

Enable payload scrambling.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

To disable trellis coding, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Specify the profile-name for which you want to disable payload scrambling.

3.

DSLAM(cfg-dsl-profile)#no payload-scrambling

Disable payload scrambling.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

The two ends of a connection must have the same payload scrambling value—that is, payload scrambling must be enabled at both ends or disabled at both ends. The line does not train if payload scrambling is enabled at one end and disabled at the other end.

Enabling or disabling payload scrambling does not cause the port to retrain.

Setting CAP Upstream and Downstream Baud Rates

This section describes how to configure upstream and downstream baud rate margins for ATU-C CAP, and ATU-C FLEXI CAP interfaces.

Cisco IOS supports provisioning additional baud rates for interface line codes. The following rules apply:

•Valid rate, Cisco IOS selects a rate less than or equal to the rate that you specified.

•Invalid rate, Cisco IOS modifies the rate to the closest available rate that is less than or equal to the rate that you specified.

In addition to the existing upstream 136 kilobaud rate, Cisco IOS also supports an upstream 17 kilobaud rate and an upstream 68 kilobaud rate. You can independently enable or disable the new baud rates.

The following list contains the valid upstream/downstream pairs within the available rates:

•An upstream rate of 17 kilobaud is valid only with a downstream rate of 136 kilobaud.

•An upstream rate of 68 kilobaud is valid only with a downstream rate of 136 kilobaud or a downstream rate of 340 kilobaud.

•All other combinations are valid.

Table 7-1 and Table 7-2 show the upstream and downstream baud rates and their corresponding bit rates for the ATU-C CAP and ATU-C FLEXI CAP interfaces.

Table 7-1 ATU-C CAP and ATU-C FLEXI CAP Upstream Baud Rates and Corresponding Bit Rates

Module

Upstream Baud Rate

Upstream Bit Rate (kbps)

ATU-C CAP/ ATU-C FLEXI CAP

136 kilobaud

1088, 952, 816, 680, 544, 408, 272 91

68 kilobaud

544, 476, 408, 340, 272, 204, 136, 46

17 kilobaud

136, 119, 102, 85, 68, 51, 34, 12

Table 7-2 ATU-C CAP and ATU-C FLEXI CAP Downstream Baud Rates and Corresponding Bit Rates

Module

Downstream Baud Rate

Downstream Bit Rate (kbps)

ATU-C CAP/ ATU-C FLEXI CAP

952 kilobaud

7168, 6272, 4480, 2688

680 kilobaud

5120, 4480, 3200, 1920

340 kilobaud

2560, 2240, 1920, 1600, 1280, 960, 640

136 kilobaud—RS¹ enabled

1024, 896, 768, 640, 512, 384, 256

136 kilobaud—RS disabled

1088, 952, 816, 680, 544, 408, 272

¹Reed-Solomon coding—long/short interleave

The following information applies to Table 7-1 and Table 7-2:

•Enabling 17 kilobaud upstream and 68 kilobaud upstream rates are not mutually exclusive.

•The valid upstream rates are the union of the common rates (136 kilobaud upstream) and the bit rates corresponding to the new bauds (17 kilobaud upstream and 68 kilobaud upstream).

•If a given upstream rate appears in more than one selected baud rate list, the higher baud rate applies.

To enable baud rates, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to enable baud rates.

3.

DSLAM(cfg-dsl-profile)#cap baud {downstream baudrate | upstream { baudrate | baudrate}}

Enable one or more baud rates for the designated CAP profile.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

To disable baud rates, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to disable baud rates.

3.

DSLAM(cfg-dsl-profile)#no cap baud {downstream baudrate | upstream { baudrate | baudrate }}

Disable one or more baud rates for the specified CAP profile.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

Setting Upstream and Downstream Bit Rates

This section describes how to configure upstream and downstream bit rates for ATU-C CAP, and ATU-C FLEXI CAP, DMT, and STU-C interfaces.

Setting Bit Rate Parameters for ATU-C CAP Interfaces

To set the downstream and upstream minimum or maximum bit rates for a CAP interface, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to set the bit rate.

3.

DSLAM(cfg-dsl-profile)#cap bitrate {minimum | maximum} downstream int upstream int

Set the bitrate for downstream and upstream for the CAP interface for this profile.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

To return the downstream and upstream bit rates for a CAP interface to their default values, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to set the default bit rate.

3.

DSLAM(cfg-dsl-profile)#no cap bitrate {minimum | maximum } downstream int upstream int

Set this profile to the default bit rate.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

Defaults

The following are the default minimum and maximum downstream and upstream bit rates for the ATU-C CAP interface.

Value Type

Default

Minimum downstream

0 kbps

Minimum upstream

0 kbps

Maximum downstream

640 kbps

Maximum upstream

91 kbps

The alarm subsystem uses the minimum bit rate settings. The Cisco IOS asserts an alarm if the line card trains at a rate below the configured minimum bit rate.

Examples

In this example, the command sets the maximum downstream and upstream bit rates to 7168 kbps, and 1088 kbps respectively:

DSLAM#configure terminal
DSLAM(config)#dsl-profile issis
DSLAM(cfg-dsl-profile)#cap bitrate maximum downstream 7168 upstream 1088
DSLAM(cfg-dsl-profile)#end

In this example, the command sets the maximum downstream and upstream bit rates to the default values for that particular interface. In this case, it is a quad port ATU-C FLEXI CAP.

DSLAM#configure terminal
DSLAM(config)#dsl-profile issis
DSLAM(cfg-dsl-profile)#cap bitrate maximum downstream 5150 upstream 880
DSLAM(cfg-dsl-profile)#end

Setting Bit Rate Parameters for DMT Interfaces

To set the maximum allowed bit rate for interleaved-path DMT parameters for a specific profile, follow these stesps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to set the maximum allowed bit rate for interleaved-path DMT profile parameters.

3.

DSLAM(cfg-dsl-profile)#dmt bitrate max interleaved-path downstream dmt-bitrate upstream dmt-bitrate

Set the maximum allowed downstream and upstream bit rate for interleaved-path DMT profile parameters to dmt-bitrate.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

To set the minimum allowed bit rate for interleaved-path DMT parameters for a specific profile, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to set the minimum allowed bit rate for interleaved-path DMT profile parameters

3.

DSLAM(cfg-dsl-profile)#dmt bitrate min interleaved-path downstream dmt-bitrate upstream dmt-bitrate

Set the maximum allowed downstream and upstream bit rate for interleaved-path DMT profile parameters to dmt-bitrate.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

The software does not send minimum bit rate settings to the line card. The Cisco IOS software uses these settings locally to determine if a line rate alarm should be set for a port.

Setting the DMT bit rate to 0 disables the associated minimum DMT bit rate alarm.

Table 7-3 lists the allowable ranges and default values for DMT bit rate.

Table 7-3 Allowable Ranges and Default Values for DMT Bit Rates

Configuration

Parameter

Data

Path

Downstream

Upstream

Aggregate

Range

(kbps)

Path

Range

(kbps)

Path

Default

(kbps)

Aggregate

Range

(kbps)

Path

Range

(kbps)

Path

Default

(kbps)

dmt bitrate max

Interleaved

8032 to 32

8032 to 32

640

864 to 32

864 to 0

128

dmt bitrate min

Interleaved

8032 to 32

8032 to 0

0

864 to 0

864 to 0

0

This command retrains the port if you change the parameter value. Setting a parameter to its previous value does not cause a retrain. If a port is training when you change this parameter, the port untrains and retrains to the new parameter value.

Example

This example sets the maximum interleaved-path bit rate of the default profile to 640 kbps downstream, and 128 kbps upstream and displays the results:

DSLAM#configure terminal
DSLAM(config)#dsl-profile default
DSLAM(cfg-dsl-profile)#dmt bitrate interleaved-path downstream 640 upstream 128
DSLAM(cfg-dsl-profile)#end
DSLAM#show dsl-profile

dsl profile default:
Alarms Enabled: NO

DMT profile parameters
Maximum Bitrates:
Interleave Path: downstream: 640/kbs, upstream: 128/kbs
Minimum Bitrates:
Interleave Path: downstream: 0/kbs, upstream: 0/kbs
Margin: downstream: 3 db, upstream: 3 db
Interleave Delay: downstream: 16000 usecs, upstream: 16000 usecs
FEC Redundancy Bytes:
Interleave Path: downstream: 16, upstream: 16
R-S Codeword Size: downstream: auto, upstream: auto
Trellis Coding: Enabled
Overhead Framing: Mode 1
Bit-Swap: Enabled
Bit-Swap From Margin: 3 dB
Bit-Swap To Margin: 3 dB
Operating Mode: Automatic
Training Mode: Standard

SDSL profile parameters
.
.
.
Setting Bit Rate Parameters for STU-C Interfaces

To set the bit rate for STU-C parameters for a profile, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode, specifying the profile-name for which you want to set the maximum allowed bit rate.

3.

DSLAM(cfg-dsl-profile)#sdsl bitrate bitrate

Set the downstream and upstream bit rates for the profile. The STU-C downstream and upstream bit rates are identical. The loop characteristics determine the achievable rate.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

Example

In this example, the command sets the bit rate of the default profile to 528 kbps downstream and upstream:

DSLAM#configure terminal
DSLAM(config)#dsl-profile default
DSLAM(cfg-dsl-profile)#sdsl bitrate 528

The Cisco IOS software does not send minimum bit rate settings to the STU-C line card. The software uses the settings locally to determine if a line rate alarm should be set for a port.

The following allowable STU-C bit rate ranges occur in units of kbps:

1168

1040

784

528

400

272

144

Caution The sdsl bitrate bitrate command causes the port to retrain when you change the parameter.

Setting a parameter to its current value does not cause a retrain. If a port is training when you change the parameter, the port untrains and retrains to the new parameter value.

Setting Signal-to-Noise Ratio Margins

This section describes how to set signal-to-noise ratio (SNR) margins for both downstream and upstream traffic for ATU-C CAP, ATU-C Flexi CAP, ATU-C Flexi DMT and 4DMT interfaces. The higher the SNR margin the more protection there is against data corruption. The higher the SNR margin the lower the data rate a given loop can support.

ATU-C CAP and ATU-C FLEXI CAP Interfaces

Use the following profile configuration commands set the SNR value for a selected ATU-C CAP or ATU-C Flexi CAP profile:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to set SNR margins.

3.

DSLAM(cfg-dsl-profile)#cap margin downstream 0-12 upstream 0-12

Set the SNR downstream and upstream margins to integers 0 through 12.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

To set the SNR margin values for an ATU-C CAP interface to the default values of 6 dB in both directions, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to set SNR margins.

3.

DSLAM(cfg-dsl-profile)#no cap margin {downstream | upstream}

Set the SNR downstream or upstream margins to the default value (6 dB).

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

Example

In this example, the command sets the SNR margin at 8 dB downstream and 5 dB upstream for the DSL profile "issis":

DSLAM#configure terminal
DSLAM(config)#dsl-profile issis
DSLAM(cfg-dsl-profile)#cap margin downstream 8 upstream 5
DSLAM(cfg-dsl-profile)#end

ATU-C 4DMT Interface

The range of DMT margin values is 0 to 15 dB in each direction. The default value for each direction is 6 dB.

To set SNR margins for a 4DMT interface, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to set SNR margins.

3.

DSLAM(cfg-dsl-profile)#dmt margin downstream dmt-margin upstream dmt-margin

Set the SNR downstream and upstream margins to dmt-margin.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

This command retrains the port if you change the parameter value. Setting a parameter to its previous value does not cause a retrain. If a port is training when you change this parameter, the port untrains and retrains to the new parameter value.

Example

This example sets the SNR margins of the default profile to 6 dB upstream and 6 dB downstream and displays the results:

DSLAM#configure terminal
DSLAM(config)#dsl-profile default
DSLAM(cfg-dsl-profile)#dmt margin downstream 6 upstream 6
DSLAM(cfg-dsl-profile)#end
DSLAM#show running-config

Building configuration...

Current configuration:
!
!
version XX.X
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname DSLAM
!
slot 1 atuc-1-4dmt
.
.
.
slot 32 atuc-1-4dmt
enable password lab
!
!
dsl-profile default
!
dsl-profile fast
dmt training-mode quick
dmt margin downstream 6 upstream 6
dmt bitrate maximum interleaved downstream 8032 upstream 480
network-clock-select 1 ATM0/1
network-clock-select 2 system
.
.
.
Setting the Interleaving Delay

This section describes how to set the interleaving delay for both the upstream and downstream traffic for DMT and CAP interfaces.

If possible, the DSLAM sets the actual interleaving delays to match the values configured in the profile. However, depending upon the bit rate to which the port finally trains, some settings of interleaving delay may not be achievable. In this case, the DSLAM chooses an actual interleaving delay that is closest (numerically) to the configured interleaving delay. Table 7-4 lists the values of interleaving delay that are achievable for all bit rates.

DMT Interfaces

Interleaving delay helps protect against impulse noise and clipping, but adds delay, which may not be tolerable for some applications.

The allowable values for configured interleaved delay are 0, 500, 1000, 2000, 4000, 8000, and 16000 microseconds. The default interleaved delay (the value assigned when a DSL profile is created) is 16000 microseconds (that is, 16 msecs) for both upstream and downstream directions.

Table 7-4 Achievable Combinations of Interleaving Delay and Symbols Per R-S Codeword for Different Bit Rate Ranges

Bit Rate Range (kbps)

Symbols per R-S Codeword Allowed

Interleaving Delay Allowed (microseconds)

8032 to 3616

1

0, 500, 1000, 2000, 8000, 16000

3584 to 3168

1 or 2

0, 500, 1000, 2000, 8000, 16000

Note A value of 500 is allowed only when symbols per codeword = 1.

3136 to 1760

2

0, 1000, 2000, 8000, 16000

1728 to 1568

2 or 4

0, 1000, 2000, 4000, 8000, 16000

Note A value 1000 is allowed only when symbols per codeword = 2. A value of 4000 is allowed only when symbols per codeword = 4.

1536 to 832

4

0, 2000, 4000, 8000, 16000

800 to 768

4 or 8

0, 2000, 4000, 8000, 16000

Note A value of 2000 is allowed only when symbols per codeword = 4.

736 to 384

8

0, 4000, 8000, 16000

352 to 0

16

0, 8000, 16000

To set upstream and downstream interleaved delay for a specific DMT profile, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to set the interleaving delay.

3.

DSLAM(cfg-dsl-profile)#dmt interleaving-delay downstream delay-in-usecs upstream delay-in-usecs

Set the downstream and upstream interleaving delay times as delay-in-usecs.

This command retrains the port if you change the parameter value. Setting a parameter to its previous value does not cause a retrain. If a port is training when you change this parameter, the port untrains and retrains to the new parameter value.

Example

This example sets the interleaving delay of the profile named "fast" to 2000 usec downstream and 4000 usec upstream, and displays the results:

DSLAM#configure terminal
DSLAM(config)#dsl-profile fast
DSLAM(cfg-dsl-profile)#dmt interleaving-delay downstream 2000 upstream 4000
DSLAM(cfg-dsl-profile)#exit
DSLAM(config)#exit
DSLAM#show dsl profile fast

dsl profile fast:
Link Traps Enabled: NO
Alarms Enabled: NO
ATM Payload Scrambling: Enabled

DMT profile parameters
Maximum Bitrates:
Interleave Path: downstream: 640 kb/s, upstream: 128 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Minimum Bitrates:
Interleave Path: downstream: 0 kb/s, upstream: 0 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Margin: downstream: 6 dB, upstream: 6 dB
Interleaving Delay: downstream: 2000 usecs, upstream: 4000 usecs
Check Bytes (FEC):
Interleave Path: downstream: 16, upstream: 16
Fast Path: downstream: 0, upstream: 0
R-S Codeword Size: downstream: auto, upstream: auto
Trellis Coding: Disabled
Overhead Framing: Mode 3
Operating Mode: Automatic
Training Mode: Quick
Minrate blocking: Disabled
SNR Monitoring: Disabled
.
.
.
CAP Interfaces

Table 7-5 shows the amount of delay (in milliseconds) that results from various combinations of baud rate, constellation, and cap interleaving-delay settings (short or long) on a 4-port Flexi card configured for CAP. Interleaving delay is applied only in the downstream direction. Interleaving is not used on upstream traffic.

Table 7-5 Downstream Interleaving Delay

Constellation

Short or Long Delay

136 Kbaud

340 Kbaud

680 Kbaud

952 Kbaud

8

short

4.4 ms

4.4 ms

-

-

long

49 ms

49 ms

-

-

16

short

3.0 ms

3.0 ms

3.0 ms

2.7 ms

long

31 ms

31 ms

16 ms

11 ms

32

short

2.3 ms

2.3 ms

-

-

long

24 ms

24 ms

-

-

64

short

1.9 ms

1.9 ms

1.8 ms

1.7 ms

long

19 ms

19 ms

9.6 ms

6.8 ms

128

short

1.6 ms

1.6 ms

-

-

long

16 ms

16 ms

-

-

256

short

1.4 ms

1.4 ms

1.4 ms

1.2 ms

long

14 ms

14 ms

6.8 ms

5.0 ms

256 uncorrected

short

1.3 ms

1.3 ms

1.2 ms

1.0 ms

long

12 ms

12 ms

6.0 ms

4.3 ms

You can choose the interleaving-delay option none only when 136k downstream baud rate is enabled. If you configure the interleaving-delay as none but the line card trains at a downstream bit rate that uses a baud rate that is other than 136k, the actual interleaving-delay value is short.

The following table shows the relationship between the interleaving-delay value chosen and the state of the Reed-Solomon error correction function.

Interleave Value

Reed-Solomon Relationship

Short

RS error correction on

Long

RS error correction on

None

RS error correction off

Note If you set interleaving delay to none, the subscriber's line may provide service at a higher bit rate than the one configured. This can happen because setting interleaving delay to none turns off Reed-Solomon error correction, and turning off error correction reduces the overhead on the line, leaving more bandwidth available to the subscriber.

To set the interleaving delay for a specific CAP profile, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to set the interleaving delay.

3.

DSLAM(cfg-dsl-profile)#cap interleaving-delay {short | long | none}

Set interleaving-delay for a designated CAP profile.

4.

DSLAM(cfg-dsl-profile)#end

Return to priviledged EXEC mode.

To return the interleaved delay to its default (long) setting, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)# dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to set the interleaving delay.

3.

DSLAM(cfg-dsl-profile)#no cap interleaving-delay

Set interleaving-delay to the default value (long) for a designated CAP profile.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

Examples

This example shows how to set the interleaving-delay value to none for the profile named "issis":

DSLAM#configure terminal
DSLAM(config)#dsl-profile issis
DSLAM(cfg-dsl-profile)#cap interleaving-delay
DSLAM(cfg-dsl-profile)#end

This example shows how to set the default interleaving delay value for the profile named "issis".

DSLAM#configure terminal
DSLAM(config)#dsl-profile issis
DSLAM(cfg-dsl-profile)#no cap interleaving-delay none
DSLAM(cfg-dsl-profile)#end

Setting the Number of Symbols Per Reed-Solomon Codeword

This section describes how to set the number of symbols per Reed-Solomon codeword. This information applies to DMT interfaces only.

The allowable values for configured symbols per codeword are 1, 2, 4, 8, 16, or auto. If you select auto (automatic), the line card chooses the optimum symbols per codeword based upon the bit rate to which the line trains. The optimum value keeps the ratio of user data to error correction bytes roughly constant. The default symbols per codeword setting (the value assigned when a DSL profile is created) is auto for both upstream and downstream directions.

If the symbols per codeword is set explicitly (any value other than auto), the DSLAM attempts to match the configured symbols per codeword. However, depending upon the bit rate to which the port finally trains, some settings of symbols per codeword may not be acheivable. When this occurs, the DSLAM chooses an actual symbols per codeword value that is closest (numerically) to the configured symbols per codeword. Table 7-6 lists the values of symbols per codeword that are allowable for various bit rate ranges.

Table 7-6 Symbols Per Codeword Values for Different Bit Rate Ranges

Bit Rate Range (kbps)

Symbols per R-S Codeword for Auto

Symbols per R-S Codeword Allowed

8032 to 3616

1

1

3584 to 3168

2

1 or 2

3136 to 1760

2

2

1728 to 1568

4

2 or 4

1536 to 832

4

4

800 to 768

8

4 or 8

736 to 384

8

8

352 to 0

16

16

When the training mode is set to quick the modem DSP automatically chooses the codeword size. The one exception is that if check bytes is set to zero and the training mode is quick, the codeword size is always one.

To set the number of symbols per Reed-Solomon codeword, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile default

Go to the profile mode.

3.

DSLAM(cfg-dsl-profile)#dmt codeword-size downstream {symbols | auto} upstream {symbols | auto}

Set codeword size. The allowable values for codeword size (in symbols per R-S codeword) are 1, 2, 4, 8, 16, or auto.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

If you set the codeword size to auto, the number of symbols per codeword will depend upon the actual DMT bit rate. The default codeword size is auto.

This command retrains the port if you change the parameter value. Setting a parameter to its previous value does not cause a retrain. If a port is training when you change this parameter, the port untrains and retrains to the new parameter value.

Example

This example sets the number of symbols per Reed-Solomon codeword to 8 upstream and 16 downstream and displays the results:

DSLAM# configure terminal
DSLAM(config)# dsl-profile default
DSLAM(cfg-dsl-profile)# dmt codeword-size downstream 16 upstream 8
DSLAM(cfg-dsl-profile)#end
DSLAM# show dsl profile default

dsl profile default:
Link Traps Enabled: NO
Alarms Enabled: NO
ATM Payload Scrambling: Enabled

DMT profile parameters
Maximum Bitrates:
Interleave Path: downstream: 640 kb/s, upstream: 128 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Minimum Bitrates:
Interleave Path: downstream: 0 kb/s, upstream: 0 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Margin: downstream: 6 dB, upstream: 6 dB
Interleaving Delay: downstream: 16000 usecs, upstream: 16000 usecs
Check Bytes (FEC):
Interleave Path: downstream: 4, upstream: 6
Fast Path: downstream: 0, upstream: 0
R-S Codeword Size: downstream: 16, upstream: 8
Trellis Coding: Disabled
Overhead Framing: Mode 3
Operating Mode: Automatic
Training Mode: Quick
Minrate blocking: Disabled
SNR Monitoring: Disabled
.
.
.
Setting FEC Check (Redundancy) Bytes

This section describes how to set upstream and downstream interleaved FEC check (redundancy) bytes per Reed-Solomon (R-S) codeword for a specific profile for DMT interfaces. The higher the check bytes setting, the better the error correction, but the check bytes subtract from user bytes.

The configured number of FEC check bytes must be an even number in the range 0 to 16 inclusive. The default (the value assigned when a DSL profile is created) is 16 check bytes for both the upstream and downstream directions.

If possible, the DSLAM sets the actual number of FEC check bytes to match the value configured in the profile. However, depending upon the bit rate to which the port finally trains, some settings of FEC check bytes may not be achievable. In this case, the DSLAM chooses an actual number of FEC check bytes that is closest (numerically) to the configured number of FEC check bytes. Table 7-7 lists the values of FEC check bytes that are achievable for all bit rates.

Table 7-7 Achievable Combinations of FEC Check Bytes and Symbols Per Reed-Solomon Codeword for Different Bit Rate Ranges

Bit Rate Range (kbps)

Symbols per R-S Codeword Allowed

FEC Check Bytes Allowed

8032 to 3616

1

0, 2, 4, 6, 8, 10, 12, 14, 16

3584 to 3168

1 or 2

0, 2, 4, 6, 8, 10, 12, 14, 16

3136 to 1760

2

0, 2, 4, 6, 8, 10, 12, 14, 16

1728 to 1568

2 or 4

0, 2, 4, 6, 8, 10, 12, 14, 16

Note Values of 2, 6, 10, or 14 are allowed only when symbols per R-S codeword = 2.

1536 to 832

4

0, 4, 8, 12, 16

800 to 768

4 or 8

0, 4, 8, 12, 16

Note Values of 4 or 12 are allowed only when symbols per R-S codeword = 4.

736 to 384

8

0, 8, 16

352 to 0

16

0, 16

To set upstream and downstream FEC check (redundancy) bytes for a specific profile, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to set FEC check bytes.

3.

DSLAM(cfg-dsl-profile)#dmt check-bytes
interleaved downstream bytes upstream bytes

Set the check bytes to the specified number of bytes downstream and bytes upstream.

This command retrains the port if you change the parameter value. Setting a parameter to its previous value does not cause a retrain. If a port is training when you change this parameter, the port untrains and retrains to the new parameter value.

It is normally desirable to keep the ratio of check bytes to user bytes roughly constant regardless of the bit rate. This requires you to change both the check bytes and the codeword size parameters.

When the training mode is set to quick, the DSLAM automatically chooses the check bytes value. However, if check bytes is set to zero and the training mode is quick, the system always uses a check bytes value of 0.

Example

This example sets the FEC check bytes for the default profile to 6 upstream and 4 downstream and displays the results:

DSLAM#configure terminal
DSLAM(config)#dsl-profile default
DSLAM(cfg-dsl-profile)#dmt check-bytes interleaved downstream 4 upstream 6
DSLAM(cfg-dsl-profile)#end
DSLAM# show dsl profile default

dsl profile default:
Link Traps Enabled: NO
Alarms Enabled: NO
ATM Payload Scrambling: Enabled

DMT profile parameters
Maximum Bitrates:
Interleave Path: downstream: 640 kb/s, upstream: 128 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Minimum Bitrates:
Interleave Path: downstream: 0 kb/s, upstream: 0 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Margin: downstream: 6 dB, upstream: 6 dB
Interleaving Delay: downstream: 16000 usecs, upstream: 16000 usecs
Check Bytes (FEC):
Interleave Path: downstream: 4, upstream: 6
Fast Path: downstream: 0, upstream: 0
R-S Codeword Size: downstream: auto, upstream: auto
Trellis Coding: Disabled
Overhead Framing: Mode 3
Operating Mode: Automatic
Training Mode: Quick
Minrate blocking: Disabled
SNR Monitoring: Disabled
.
.
.
Enabling and Disabling Trellis Coding

This section describes how to enable or disable trellis coding.

To enable trellis coding, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Specify the profile-name for which you want to enable trellis coding.

3.

DSLAM(cfg-dsl-profile)#dmt encoding trellis

Enable trellis coding.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

To disable trellis coding, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Specify the profile-name for which you want to disable trellis coding.

3.

DSLAM(cfg-dsl-profile)#no dmt encoding trellis

Disable trellis coding.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

This command retrains the port if you change the parameter value. Setting a parameter to its previous value does not cause a retrain. If a port is training when you change this parameter, the port untrains and retrains to the new parameter value.

The system can use trellis coding only if the profile enables it and the CPE supports trellis coding.

Example

This example turns off trellis encoding for the default profile and displays the results:

DSLAM#configure terminal
DSLAM(config)#dsl-profile default
DSLAM(cfg-dsl-profile)#no dmt encoding trellis
DSLAM(cfg-dsl-profile)#end
DSLAM#show dsl profile
dsl profile default:
Link Traps Enabled: NO
Alarms Enabled: YES
ATM Payload Scrambling: Enabled

DMT profile parameters
Maximum Bitrates:
Interleave Path: downstream: 640 kb/s, upstream: 128 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Minimum Bitrates:
Interleave Path: downstream: 0 kb/s, upstream: 0 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Margin: downstream: 6 dB, upstream: 6 dB
Interleaving Delay: downstream: 16000 usecs, upstream: 16000 usecs
Check Bytes (FEC):
Interleave Path: downstream: 4, upstream: 6
Fast Path: downstream: 0, upstream: 0
R-S Codeword Size: downstream: 16, upstream: 8
Trellis Coding: Disabled
Overhead Framing: Mode 2
Operating Mode: Automatic
Training Mode: Quick
Minrate blocking: Disabled
SNR Monitoring: Disabled
.
.
.
Setting the Overhead Framing Mode

To set the overhead framing mode of a DMT profile, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to set the overhead framing mode.

3.

DSLAM(cfg-dsl-profile)#dmt overhead-framing
{mode1 | mode2 | mode3}

Set the overhead framing mode.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

This command does not retrain the port when you change the parameter value.

If the actual framing mode used is the mode the ATU-C port requested, or if the ATU-R CPE does not support the ATU-C's choice, then the highest mode the ATU-R does support is used.

Example

This example sets the overhead framing mode in the default profile to mode2 and displays the results:

DSLAM#configure terminal
DSLAM(config)#dsl-profile default
DSLAM(cfg-dsl-profile)#dmt overhead-framing mode2
DSLAM(cfg-dsl-profile)#end
DSLAM#show dsl profile

dsl profile default:
Link Traps Enabled: NO
Alarms Enabled: YES
ATM Payload Scrambling: Enabled

DMT profile parameters
Maximum Bitrates:
Interleave Path: downstream: 640 kb/s, upstream: 128 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Minimum Bitrates:
Interleave Path: downstream: 0 kb/s, upstream: 0 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Margin: downstream: 6 dB, upstream: 6 dB
Interleaving Delay: downstream: 16000 usecs, upstream: 16000 usecs
Check Bytes (FEC):
Interleave Path: downstream: 4, upstream: 6
Fast Path: downstream: 0, upstream: 0
R-S Codeword Size: downstream: 16, upstream: 8
Trellis Coding: Disabled
Overhead Framing: Mode 2
Operating Mode: Automatic
Training Mode: Quick
Minrate blocking: Disabled
SNR Monitoring: Disabled

Modifying the Operating Mode

To modify the operating mode of a DMT profile, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to modify the operating mode.

3.

DSLAM(cfg-dsl-profile)#dmt operating-mode {auto | g992-1 | g992-2 | t1-413}

Set an operating mode for the selected profile.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

To set the operating mode of a DMT profile to the default mode, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to modify the operating mode.

3.

DSLAM(cfg-dsl-profile)#no dmt operating-mode

Force the operating mode to the default mode, auto.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

An ADSL line uses of one of these operating modes:

•auto—An ATU-C port that employs this operating mode automatically detects the capabilities of the ATU-R CPE and uses a startup sequence specified by either G.992.1, G.992.2, or T1.413-1998, or splitterless mode. Auto mode is the default for an ADSL line.

•g992-1—In this mode the line uses the G994.1 startup sequence. After startup, the line complies to G992.1 operation.

•g992-2—In this mode the line uses the G994.1 startup sequence. After startup, the line complies to G992.2 operation. (G992.2 is also known as G.lite.)

•t1-413—This mode forces the ATU-R CPE to use the T1.413-1998 startup sequence.

This command retrains the port if you change the parameter value. Setting a parameter to its previous value does not cause a retrain. If a port is training when you change this parameter, the port untrains and retrains to the new parameter value.

Example

This example sets the operating mode of the default profile to splitterless and displays the results:

DSLAM# configure terminal
DSLAM(config)# dsl-profile default
DSLAM(cfg-dsl-profile)# dmt operating-mode splitterless
DSLAM# show dsl profile default

dsl profile default:
Alarms Enabled: NO
DMT profile parameters
Maximum Bitrates:
Interleave Path: downstream: 640/kbs, upstream: 128/kbs
Minimum Bitrates:
Interleave Path: downstream: 0/kbs, upstream: 0/kbs
Margin: downstream: 3 db, upstream: 3 db
Interleave Delay: downstream: 16000 usecs, upstream: 16000 usecs
FEC Redundancy Bytes:
Interleave Path: downstream: 16, upstream: 16
R-S Codeword Size: downstream: auto, upstream: auto
Trellis Coding: Enabled
Overhead Framing: Mode 1
Bit-Swap: Enabled
Bit-Swap From Margin: 3 dB
Bit-Swap To Margin: 3 dB
Operating Mode: Splitterless
Training Mode: Standard
.
.
.
Modifying the Training Mode

To modify the training mode of a DMT profile, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to modify the training mode.

3.

DSLAM(cfg-dsl-profile)#dmt training-mode {standard | quick}

Modify the training mode. The choices are standard and quick.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

To set the training mode of a DMT profile to its default value, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to modify the training mode.

3.

DSLAM(cfg-dsl-profile)#no dmt training-mode

Set the training mode to its default value.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

This object specifies the mode employed by the ATU-C port when it is training to an ATU-R CPE. There are two training modes:

•Standard—This mode uses the G.994.1 or T1.413-1998 initialization sequence depending on configuration. In standard training mode the ATU-C port trains with the modem once, and if the configured rates and settings are not obtainable, the line card reads the line quality and retrains, selecting the best available rates and settings. This mode allows more control over the DMT parameters.

•Quick—This mode is the default. It uses the extended exchange sequence for T1.413-1998 initialization or the G.994.1 initialization, depending on configuration. In quick training mode the modem DSP automatically determines the best available rate based on the parameters provided. The DSP may be forced to change some of the configuration settings based on the line characteristics. This training mode is faster than the standard mode.

This command does not retrain the port when you change the parameter value.

Example

This example sets the training mode of the default profile to quick and displays the results:

DSLAM#configure terminal
DSLAM(config)#dsl-profile default
DSLAM(cfg-dsl-profile)#dmt training-mode quick
DSLAM(cfg-dsl-profile)#end
DSLAM#show dsl profile default

dsl profile default:
Link Traps Enabled: NO
Alarms Enabled: YES
ATM Payload Scrambling: Enabled

DMT profile parameters
Maximum Bitrates:
Interleave Path: downstream: 640 kb/s, upstream: 128 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Minimum Bitrates:
Interleave Path: downstream: 0 kb/s, upstream: 0 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Margin: downstream: 6 dB, upstream: 6 dB
Interleaving Delay: downstream: 16000 usecs, upstream: 16000 usecs
Check Bytes (FEC):
Interleave Path: downstream: 4, upstream: 6
Fast Path: downstream: 0, upstream: 0
R-S Codeword Size: downstream: 16, upstream: 8
Trellis Coding: Disabled
Overhead Framing: Mode 2
Operating Mode: Automatic
Training Mode: Quick
Minrate blocking: Disabled
SNR Monitoring: Disabled

SDSL profile parameters
.
.
.
DSLAM(cfg-dsl-profile)#end
DSLAM(cfg-dsl-profile)#end
Setting the Power Spectral Density Mask

This section describes how to set the ATU-C CAP and ATU-C FLEXI CAP power spectral density mask (PSDM) upstream and downstream values.

To set the ATU-C CAP and ATU-C FLEXI CAP power spectral density mask (PSDM) upstream and downstream values, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode, specifying the profile-name for which you want to set the PSDM value.

3.

DSLAM(cfg-dsl-profile)#cap psdm downstream psdm upstream psdm

Set the PSDM rate downstream and upstream for this profile.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

Defaults

The default decibel values for PSDM rates are:

•-40 dB downstream

•-38 dB upstream

Examples

In this example, the command sets the CAP PSDM value at -37 dB downstream and -41 dB upstream for the profile "issis".

DSLAM#configure terminal
DSLAM(config)#dsl-profile issis
DSLAM(cfg-dsl-profile)#cap psdm downstream -37 upstream -41
DSLAM(cfg-dsl-profile)#end

In this example, the command sets the CAP PSDM value to the default downstream and upstream settings of -40 dB and -38 dB for the profile "issis".

DSLAM#configure terminal
DSLAM(config)#dsl-profile issis
DSLAM(cfg-dsl-profile)#no cap psdm downstream -40 upstream -38
DSLAM(cfg-dsl-profile)#end

Setting the ATU-C CAP CPE-Signature

You can set the customer premises equipment (CPE) signature for each configuration profile. To set the CAP CPE-signature for a desginated profile, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl-profile profile-name

Go to the profile configuration mode and specify the profile-name for which you want to set the CPE signature value.

3.

DSLAM(cfg-dsl-profile)#cap cpe-signature 0-255

Set the CPE signature value.

4.

DSLAM(cfg-dsl-profile)#end

Exit from profile configuration mode.

Running the Chipset Self-Test

To run the DMT chipset self-test, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#dsl test atm slot/port self

Run the self test on the specified slot and port.

3.

DSLAM#show dsl interface atm slot/port

Display the results of the self test.

This command runs a digital bit error-rate loopback test on the specified port. The run time for the self-test ranges from 3 seconds for the ATUC-1-4DMT card to 1 minute for the 4-port Flexi card.

To view the result of the self-test, use the command show dsl interface atm slot/port.

The output for this command includes the result of the last self-test, such as

Last Self-Test Result: NONE

The possible self-test results are PASSED, FAILED, RUNNING, and NONE. NONE means that a chipset self-test has not run since the port became operational. RUNNING means that the test is in progress.

Caution The chipset self-test disrupts port operation. If a port has trained or is training when this test begins, the port becomes untrained, the test executes, and the port retrains.

Example

This example runs the chipset self-test for port 1 on slot 6 and displays the results:

DSLAM#configure terminal
DSLAM(config)#dsl test atm 6/1 self
DSLAM(config)#exit
DSLAM#show dsl interface atm 6/1
Port Status:
Subscriber Name: Circuit ID:
IOS admin: UP oper: UP Card status: Present
Last Change: 36352 days, 13 hrs, 51 min, 47 sec No. of changes: 0
Line Status: TRAINED
Test Mode: NONE
Loopback: NONE

ADSL Chipset Self-Test: PASSED
CO Modem Firmware Version: 0x1319BE02

Configured:

DMT Profile Name: fast
Alarms Enabled: NO

Enabling and Disabling ATM Local Loopback

When you enable the loopback functionality, loopback cells are inserted on designated VPCs/VCCs. The NI-2 notifies you through the management information base (MIB) or Interim Local Management Interface (ILMI) if loopback cells do not return.

This section describes how to enable and disable ATM local loopback on a port.

To enable ATM local loopback on a port, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#interface atm slot/port

Go to the interface configuration mode and specify the port for which you want to enable local loopback.

3.

DSLAM(config-if)#loopback diagnostic

Enable the loopback diagnostic for the selected port.

4.

DSLAM(config-if)#end

Exit from profile configuration mode.

To disable ATM local loopback on a port, follow these steps:

Step

Command

Task

1.

DSLAM#configure terminal

Go to the global configuration mode.

2.

DSLAM(config)#interface atm slot/port

Go to the interface configuration mode and specify the port for which you want to enable local loopback.

3.

DSLAM(config-if)#no loopback diagnostic

Disable the loopback diagnostic for the selected port.

4.

DSLAM(config-if)#end

Exit from profile configuration mode.

This command retrains the port if you change the parameter. Setting a parameter to its previous value does not cause a retrain. If a port is training when you change this parameter, the port untrains and retrains to the new parameter.

Example

This command disables ATM local loopback for port 1 on slot 0 and displays the results:

DSLAM#configure terminal
DSLAM(config)#interface atm 0/1
DSLAM(config-if)#no loopback diagnostic
DSLAM(config-if)#end
DSLAM#show dsl interface atm 0/1
Port Status:
Subscriber Name: Circuit ID:
IOS admin: UP oper: UP Card status: Present
Last Change: 36352 days, 13 hrs, 51 min, 47 sec No. of changes: 0
Line Status: TRAINED
Test Mode: NONE
Loopback: NONE

ADSL Chipset Self-Test: NONE
CO Modem Firmware Version: 0x1319BE02
.
.
.

Displaying DSL and ATM Status

To display DSL and ATM status for a port, follow these steps:

Step

Command

Task

1.

DSLAM#show dsl status slot/port

Display the administrative and operational status of the port (up/down), the actual line rates, the subscriber name and circuit ID assigned to the port, and the subtend ID for the specified slot/port.

2.

DSLAM#show dsl interface atm slot/port

Display the information provided by show dsl status, plus configured profile parameters and actual parameter values for the specified slot/port.

Example

This example displays the DSL and ATM status for port 1 in slot 4:

DSLAM#show dsl status 4/1
DSLAM#show dsl interface atm 4/1
Port Status:
Subscriber Name: Circuit ID:
IOS admin: UP oper: DOWN Card status: ATUC-1-4DMT
Last Change: 00 days, 00 hrs, 12 min, 33 sec No. of changes: 684
Line Status: NO CPE DETECTED
Test Mode: NONE

ADSL Chipset Self-Test: NONE

CO Modem Firmware Version: 0x30CCBE05

Configured:
DMT Profile Name: default
Link Traps Enabled: NO
Alarms Enabled: NO
ATM Payload Scrambling: Enabled

DMT profile parameters
Maximum Bitrates:
Interleave Path: downstream: 640 kb/s, upstream: 128 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Minimum Bitrates:
Interleave Path: downstream: 0 kb/s, upstream: 0 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Margin: downstream: 6 dB, upstream: 6 dB
Interleaving Delay: downstream: 16000 usecs, upstream: 16000 usecs
Check Bytes (FEC):
Interleave Path: downstream: 4, upstream: 6
Fast Path: downstream: 0, upstream: 0
R-S Codeword Size: downstream: 16, upstream: 8
Trellis Coding: Disabled
Overhead Framing: Mode 3
Operating Mode: Automatic
Training Mode: Quick

Status:
Bitrates:
Interleave Path: downstream: 0 kb/s, upstream: 0 kb/s
Fast Path: downstream: 0 kb/s, upstream: 0 kb/s
Attainable Aggregate
Bitrates:
downstream: 0 kb/s, upstream: 0 kb/s
Margin: downstream: 0 dB, upstream: 0 dB
Attenuation: downstream: 0 dB, upstream: 0 dB
Interleave Delay: downstream: 0 usecs, upstream: 0 usecs
Check Bytes (FEC):
Interleave Path: downstream: 0, upstream: 0
Fast Path: downstream: 0, upstream: 0
R-S Codeword Size: downstream: 0, upstream: 0
Trellis Coding: Not In Use
Overhead Framing: Mode 0
Line Fault: NONE
Operating Mode: Unknown
Line Type: Fast and Interleaved

Alarms:
status: NONE

ATM Statistics:
Interleaved-Path Counters:
Cells: downstream: 0 upstream: 0
HEC errors: downstream: 0 upstream: 0
LOCD events: near end: 0 far end: 0
Fast-Path Counters:
Cells: downstream: 0 upstream: 0
HEC errors: downstream: 0 upstream: 0
LOCD events: near end: 0 far end: 0

DSL Statistics:
Init Events: 341
Transmitted Superframes: near end: 0 far end: 0
Received Superframes: near end: 0 far end: 0
Corrected Superframes: near end: 0 far end: 0
Uncorrected Superframes: near end: 0 far end: 0

CPE Info
Serial Number: 00000000
Vendor ID: 0
Version Number: 0

Displaying Hardware Information

This section describes how to display information about the DSLAM hardware components.

To display a list of the cards in the chassis, the chassis type, and whether the power supply and fan interfaces are present, follow this step:

Step

Command

Task

1.

DSLAM#show hardware

Display the type of card in each slot in the chassis, the chassis type, and whether the power supply and fan interfaces are present.

To display the name of the card in the specified slot, follow this step:

Step

Command

Task

1.

DSLAM#show hardware slot slot

Display the name of the card in the specified slot.

To display the manufacturing information for the card in the slot: Chassis type, chassis name, manufacturer's name, H/W revision, Serial #, Asset ID, Alias, and CLEI code, follow this step:

Step

Command

Task

1.

DSLAM#show hardware chassis

Display the manufacturing information for the DSLAM: Chassis type, chassis name, manufacturer's name, H/W revision, Serial #, Asset ID, Alias, and CLEI code.

To display the online insertion and removal (OIR) status of the line cards, follow this step:

Step

Command

Task

1.

DSLAM#show oir status [slot]

Display the manufacturing information for the DSLAM: Chassis type, chassis name, manufacturer's name, H/W revision, Serial #, Asset ID, Alias, and CLEI code.

The show oir status command reports the status of line card slots in the DSLAM chassis. The reported status is one of the following:

•Loading: the line card in this slot is loading a new image, which typically takes about 2 minutes.

•Running: the line card in this slot is operating normally.

•Keepalive: the NI-2 is unable to communicate with the line card in this slot. The NI-2 keeps the line card in keepalive state for several seconds. If communication does not resume, the system assumes the card was removed.

When the NI-2 cannot communicate with a line card, the NI-2 provides no entry for the slot where the card is located. The show oir status command displays a history of attempts to communicate with the line card.

Examples

This example displays the physical card in the chassis and the chassis type and indicates if the power supply and fan interfaces are present:

DSLAM#show hardware

Chassis Type:C6160

Slot 1 :EMPTY Slot 18:EMPTY
Slot 2 :EMPTY Slot 19:ATUC-4FLEXICAP
Slot 3 :EMPTY Slot 20:EMPTY
Slot 4 :EMPTY Slot 21:ATUC-1-4DMT
Slot 5 :EMPTY Slot 22:ATUC-4FLEXIDMT
Slot 6 :EMPTY Slot 23:EMPTY
Slot 7 :EMPTY Slot 24:EMPTY
Slot 8 :EMPTY Slot 25:EMPTY
Slot 9 :EMPTY Slot 26:EMPTY
Slot 10:NI-2-DS3-DS3 Slot 27:EMPTY
Slot 11:EMPTY Slot 28:EMPTY
Slot 12:STUC-4-2B1Q-DIR-1 Slot 29:EMPTY
Slot 13:EMPTY Slot 30:EMPTY
Slot 14:EMPTY Slot 31:EMPTY
Slot 15:EMPTY Slot 32:EMPTY
Slot 16:EMPTY Slot 33:EMPTY
Slot 17:EMPTY Slot 34:EMPTY

Fan Module 1: Present 2: Present

Power Supply Module 1: 6260-PEM-AC
Power Supply Module 2: 6260-PEM-AC

This example displays information on the cards in slots 20 and 21:

DSLAM#show hardware slot 20

Slot 20:EMPTY

DSLAM#show hardware slot 21

Slot 21: ATUC-1-4DMT

Hardware Revision : 1.0
Part Number : 800-05262-03
Board Revision : A0
Deviation Number : 0-0
Fab Version : 03
PCB Serial Number : SAL04300VR2
RMA Test History : 00
RMA Number : 0-0-0-0
RMA History : 00
CLEI Code : DML2GGCAAB
Asset Identifier :
EEPROM format version 4
EEPROM contents (hex):
0x00: 04 FF 40 01 53 41 01 00 C0 46 03 20 00 14 8E 03
0x10: 42 41 30 80 00 00 00 00 02 03 C1 8B 53 41 4C 30
0x20: 34 33 30 30 56 52 32 03 00 81 00 00 00 00 04 00
0x30: C6 8A 44 4D 4C 32 47 47 43 41 41 42 CC 20 00 00
0x40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF FF
0x60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

This example displays the manufacturing information for the DSLAM, including information on the NI2, backplane, I/O card, and power modules.

DSLAM#show hardware chassis

Chassis Type: C6260

NI2 Daughtercard EEPROM:
Hardware Revision : 1.0
Part Number : 73-3952-05
Board Revision : A0
Deviation Number : 0-0
Fab Version : 02
PCB Serial Number : 00010218817
RMA Test History : 00
RMA Number : 0-0-0-0
RMA History : 00
Unknown Field (type 0086): 00 00 00 00
EEPROM format version 4
EEPROM contents (hex):
0x00: 04 FF 40 01 4F 41 01 00 82 49 0F 70 05 42 41 30
0x10: 80 00 00 00 00 02 02 C1 8B 30 30 30 31 30 32 31
0x20: 38 38 31 37 03 00 81 00 00 00 00 04 00 86 00 00
0x30: 00 00 FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0x40: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0x50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0x60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

NI2 Motherboard EEPROM:
Hardware Revision : 1.0
Part Number : 800-05631-05
Board Revision : 01
Deviation Number : 0-0
Fab Version : 03
PCB Serial Number : 00010218817
RMA Test History : 00
RMA Number : 0-0-0-0
RMA History : 00
CLEI Code : unassigned
Asset Identifier : 00000000000000000000000000000000
Processor type : 00
EEPROM format version 4
EEPROM contents (hex):
0x00: 04 FF 40 01 94 41 01 00 C0 46 03 20 00 15 FF 05
0x10: 42 30 31 80 00 00 00 00 02 03 C1 8B 30 30 30 31
0x20: 30 32 31 38 38 31 37 03 00 81 00 00 00 00 04 00
0x30: C6 8A 75 6E 61 73 73 69 67 6E 65 64 CC 20 30 30
0x40: 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30
0x50: 30 30 30 30 30 30 30 30 30 30 30 30 30 30 09 00
0x60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

BackPlane EEPROM:
Hardware Revision : 1.0
Part Number : 73-3999-05
Board Revision : A0
Deviation Number : 0-0
Fab Version : 04
PCB Serial Number : SAA04090051
RMA Test History : 00
RMA Number : 0-0-0-0
RMA History : 00
Chassis Serial Number : SCA041007X7
CLEI Code : DMM3BH0ERA
Asset Identifier :
EEPROM format version 4
EEPROM contents (hex):
0x00: 04 FF 41 01 00 82 49 0F 9F 05 42 41 30 80 00 00
0x10: 00 00 02 04 C1 8B 53 41 41 30 34 30 39 30 30 35
0x20: 31 03 00 81 00 00 00 00 04 00 C2 8B 53 43 41 30
0x30: 34 31 30 30 37 58 37 C6 8A 44 4D 4D 33 42 48 30
0x40: 45 52 41 CC 20 00 00 00 00 00 00 00 00 00 00 00
0x50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x60: 00 00 00 00 00 FF FF FF FF FF FF FF FF FF FF FF
0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0x80: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0x90: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xA0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xB0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xC0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xD0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xE0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xF0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

I/O Card EEPROM:
Hardware Revision : 1.0
Part Number : 800-08690-01
Board Revision : 01
Deviation Number : 0-0
Fab Version : 01
PCB Serial Number : SAD04350CBB
RMA Test History : 00
RMA Number : 0-0-0-0
RMA History : 00
Chassis MAC Address : 0001.64ff.a97f
MAC Address block size : 1024
CLEI Code : ABCDEFGHIJ
Asset Identifier :
EEPROM format version 4
EEPROM contents (hex):
0x00: 04 FF 40 02 43 41 01 00 C0 46 03 20 00 21 F2 01
0x10: 42 30 31 80 00 00 00 00 02 01 C1 8B 53 41 44 30
0x20: 34 33 35 30 43 42 42 03 00 81 00 00 00 00 04 00
0x30: C3 06 00 01 64 FF A9 7F 43 04 00 C6 8A 41 42 43
0x40: 44 45 46 47 48 49 4A CC 20 00 00 00 00 00 00 00
0x50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x60: 00 00 00 00 00 00 00 00 00 FF FF FF FF FF FF FF
0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0x80: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0x90: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xA0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xB0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xC0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xD0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xE0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xF0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

Slot 1 Power Module EEPROM:
Hardware Revision : 1.0
Part Number : 34-1695-01
Deviation Number : 0-0
RMA Test History : 00
RMA Number : 0-0-0-0
RMA History : 00
Chassis Serial Number : 00000000562
Power Supply Type : AC
CLEI Code :
Asset Identifier :
EEPROM format version 4
EEPROM contents (hex):
0x00: 04 FF 41 01 00 82 22 06 9F 01 80 00 00 00 00 03
0x10: 00 81 00 00 00 00 04 00 C2 8B 30 30 30 30 30 30
0x20: 30 30 35 36 32 0B 00 C6 8A 00 00 00 00 00 00 00
0x30: 00 00 00 CC 20 00 00 00 00 00 00 00 00 00 00 00
0x40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x50: 00 00 00 00 00 FF FF FF FF FF FF FF FF FF FF FF
0x60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0x80: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0x90: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xA0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xB0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xC0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xD0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xE0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xF0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

Slot 2 Power Module EEPROM:
Hardware Revision : 1.0
Part Number : 34-1695-01
Deviation Number : 0-0
RMA Test History : 00
RMA Number : 0-0-0-0
RMA History : 00
Chassis Serial Number : 00000000552
Power Supply Type : AC
CLEI Code :
Asset Identifier :
EEPROM format version 4
EEPROM contents (hex):
0x00: 04 FF 41 01 00 82 22 06 9F 01 80 00 00 00 00 03
0x10: 00 81 00 00 00 00 04 00 C2 8B 30 30 30 30 30 30
0x20: 30 30 35 35 32 0B 00 C6 8A 00 00 00 00 00 00 00
0x30: 00 00 00 CC 20 00 00 00 00 00 00 00 00 00 00 00
0x40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x50: 00 00 00 00 00 FF FF FF FF FF FF FF FF FF FF FF
0x60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0x80: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0x90: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xA0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xB0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xC0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xD0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xE0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0xF0: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

Step	Command	Task
1.	`DSLAM#`configure terminal	Go to the global configuration mode.
2.	`DSLAM(config)#`interface atm slot/port	Go to the interface configuration mode and specify the port you want to enable.
3.	`DSLAM(config-if)#`no shutdown	Enable the specified port.

Step	Command	Task
1.	`DSLAM#`configure terminal	Go to the global configuration mode.
2.	`DSLAM(config)#`slot slot# cardtype	Configure the slot# to the desired cardtype.

Step	Command	Task
1.	`DSLAM#`configure terminal	Go to the global configuration mode.
2.	`DSLAM(config)#`dsl-profile profile-name	Create a profile named profile-name, or select an existing profile named profile-name for modification.

Step	Command	Task
1.	`DSLAM#`configure terminal	Go to the global configuration mode.
2.	`DSLAM(config)#`no dsl-profile profile-name	Deleted profile-name.

Step	Command	Task
1.	`DSLAM#`configure terminal	Go to the global configuration mode.
2.	`DSLAM(config)#`dsl-copy-profile [force] source source-profile destination new-profile	Copy the profile named source-profile to a profile named new-profile

Step	Command	Task
1.	`DSLAM#`configure terminal	Go to the global configuration mode.
2.	`DSLAM(config)#`interface atm slot/port	Go to the interface configuration mode and specify the slot/port to which you want to attach the profile.
3.	`DSLAM(config-if)#`dsl profile profile-name	Attach profile-name to the slot/port.

Module	Upstream Baud Rate	Upstream Bit Rate (kbps)
ATU-C CAP/ ATU-C FLEXI CAP	136 kilobaud	1088, 952, 816, 680, 544, 408, 272 91
	68 kilobaud	544, 476, 408, 340, 272, 204, 136, 46
	17 kilobaud	136, 119, 102, 85, 68, 51, 34, 12

Module	Downstream Baud Rate	Downstream Bit Rate (kbps)
ATU-C CAP/ ATU-C FLEXI CAP	952 kilobaud	7168, 6272, 4480, 2688
	680 kilobaud	5120, 4480, 3200, 1920
	340 kilobaud	2560, 2240, 1920, 1600, 1280, 960, 640
	136 kilobaud—RS¹ enabled	1024, 896, 768, 640, 512, 384, 256
	136 kilobaud—RS disabled	1088, 952, 816, 680, 544, 408, 272

Step	Command	Task
1.	`DSLAM#`configure terminal	Go to the global configuration mode.
2.	`DSLAM(config)#`dsl-profile profile-name	Go to the profile configuration mode and specify the profile-name for which you want to set the bit rate.
3.	`DSLAM(cfg-dsl-profile)#`cap bitrate {minimum \| maximum} downstream int upstream int	Set the bitrate for downstream and upstream for the CAP interface for this profile.
4.	`DSLAM(cfg-dsl-profile)#`end	Exit from profile configuration mode.

Value Type	Default
Minimum downstream	0 kbps
Minimum upstream	0 kbps
Maximum downstream	640 kbps
Maximum upstream	91 kbps

Configuration Parameter	Data Path	Downstream			Upstream
Configuration Parameter	Data Path	Aggregate Range (kbps)	Path Range (kbps)	Path Default (kbps)	Aggregate Range (kbps)	Path Range (kbps)	Path Default (kbps)
dmt bitrate max	Interleaved	8032 to 32	8032 to 32	640	864 to 32	864 to 0	128
dmt bitrate max	Interleaved	8032 to 32	8032 to 32	640	864 to 32	864 to 0	128
dmt bitrate min	Interleaved	8032 to 32	8032 to 0	0	864 to 0	864 to 0	0
dmt bitrate min	Interleaved	8032 to 32	8032 to 0	0	864 to 0	864 to 0	0

Bit Rate Range (kbps)	Symbols per R-S Codeword Allowed	Interleaving Delay Allowed (microseconds)
8032 to 3616	1	0, 500, 1000, 2000, 8000, 16000
3584 to 3168	1 or 2	0, 500, 1000, 2000, 8000, 16000 Note A value of 500 is allowed only when symbols per codeword = 1.
3136 to 1760	2	0, 1000, 2000, 8000, 16000
1728 to 1568	2 or 4	0, 1000, 2000, 4000, 8000, 16000 Note A value 1000 is allowed only when symbols per codeword = 2. A value of 4000 is allowed only when symbols per codeword = 4.
1536 to 832	4	0, 2000, 4000, 8000, 16000
800 to 768	4 or 8	0, 2000, 4000, 8000, 16000 Note A value of 2000 is allowed only when symbols per codeword = 4.
736 to 384	8	0, 4000, 8000, 16000
352 to 0	16	0, 8000, 16000

Constellation	Short or Long Delay	136 Kbaud	340 Kbaud	680 Kbaud	952 Kbaud
8	short	4.4 ms	4.4 ms	-	-
8	long	49 ms	49 ms	-	-
16	short	3.0 ms	3.0 ms	3.0 ms	2.7 ms
16	long	31 ms	31 ms	16 ms	11 ms
32	short	2.3 ms	2.3 ms	-	-
32	long	24 ms	24 ms	-	-
64	short	1.9 ms	1.9 ms	1.8 ms	1.7 ms
64	long	19 ms	19 ms	9.6 ms	6.8 ms
128	short	1.6 ms	1.6 ms	-	-
128	long	16 ms	16 ms	-	-
256	short	1.4 ms	1.4 ms	1.4 ms	1.2 ms
256	long	14 ms	14 ms	6.8 ms	5.0 ms
256 uncorrected	short	1.3 ms	1.3 ms	1.2 ms	1.0 ms
256 uncorrected	long	12 ms	12 ms	6.0 ms	4.3 ms

Interleave Value	Reed-Solomon Relationship
Short	RS error correction on
Long	RS error correction on
None	RS error correction off

Step	Command	Task
1.	`DSLAM#`configure terminal	Go to the global configuration mode.
2.	`DSLAM(config)#` dsl-profile profile-name	Go to the profile configuration mode and specify the profile-name for which you want to set the interleaving delay.
3.	`DSLAM(cfg-dsl-profile)#`no cap interleaving-delay	Set interleaving-delay to the default value (long) for a designated CAP profile.
4.	`DSLAM(cfg-dsl-profile)#`end	Exit from profile configuration mode.

Step	Command	Task
1.	`DSLAM#`configure terminal	Go to the global configuration mode.
2.	`DSLAM(config)#`dsl-profile default	Go to the profile mode.
3.	`DSLAM(cfg-dsl-profile)#`dmt codeword-size downstream {symbols \| auto} upstream {symbols \| auto}	Set codeword size. The allowable values for codeword size (in symbols per R-S codeword) are 1, 2, 4, 8, 16, or auto.
4.	`DSLAM(cfg-dsl-profile)#`end	Exit from profile configuration mode.

Bit Rate Range (kbps)	Symbols per R-S Codeword Allowed	FEC Check Bytes Allowed
8032 to 3616	1	0, 2, 4, 6, 8, 10, 12, 14, 16
3584 to 3168	1 or 2	0, 2, 4, 6, 8, 10, 12, 14, 16
3136 to 1760	2	0, 2, 4, 6, 8, 10, 12, 14, 16
1728 to 1568	2 or 4	0, 2, 4, 6, 8, 10, 12, 14, 16 Note Values of 2, 6, 10, or 14 are allowed only when symbols per R-S codeword = 2.
1536 to 832	4	0, 4, 8, 12, 16
800 to 768	4 or 8	0, 4, 8, 12, 16 Note Values of 4 or 12 are allowed only when symbols per R-S codeword = 4.
736 to 384	8	0, 8, 16
352 to 0	16	0, 16

Step	Command	Task
1.	DSLAM#configure terminal	Go to the global configuration mode.
2.	`DSLAM(config)#`dsl-profile profile-name	Go to the profile configuration mode, specifying the profile-name for which you want to set the PSDM value.
3.	`DSLAM(cfg-dsl-profile)#`cap psdm downstream psdm upstream psdm	Set the PSDM rate downstream and upstream for this profile.
4.	`DSLAM(cfg-dsl-profile)#`end	Exit from profile configuration mode.

Step	Command	Task
1.	`DSLAM#`configure terminal	Go to the global configuration mode.
2.	`DSLAM(config)#`dsl test atm slot/port self	Run the self test on the specified slot and port.
3.	`DSLAM#`show dsl interface atm slot/port	Display the results of the self test.

Step	Command	Task
1.	`DSLAM#`show dsl status slot/port	Display the administrative and operational status of the port (up/down), the actual line rates, the subscriber name and circuit ID assigned to the port, and the subtend ID for the specified slot/port.
2.	`DSLAM#`show dsl interface atm slot/port	Display the information provided by show dsl status, plus configured profile parameters and actual parameter values for the specified slot/port.