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To enable upstream or downstream baud (symbol) rates, use the cap baud command in profile configuration mode. Use the no form of the command to disable a previously set baud rate.
cap baud {downstream cap-baudrate | upstream cap-baudrate}
downstream cap-baudrate | Set the downstream baud rate. The valid value is 136k. |
upstream cap-baudrate | Set the upstream baud rate. The valid values are 17k and 68k. |
Disabled
Profile configuration
| Release | Modification |
|---|---|
12.0(8)DA | This command was introduced. |
Enabling each of the kbaud symbol rates allows you to configure data rates with greater granularity.
Refer to Chapter 7, Configuring Digital Subscriber Lines in the Cisco Configuration Guide for DSLAMs with NI-2, for more information about configuring specific profiles.
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Note The 17k and 68k upstream baud rates are not available on the dual-port CAP line card. The upstream parameter is used with the ATU-C FLEX card. |
When you execute the cap baud command, Cisco IOS creates the named profile, if it does not exist. Changed values apply to all ports associated with the selected configuration profile.
In this example, the command enables the 136 downstream and 68 upstream kbaud symbol rates for the profile named issis:
DSLAM# conf t
DSLAM# dsl-profile issis
DSLAM(config-dsl-prof)# cap baud downstream 136k
DSLAM(config-dsl-prof)# cap baud upstream 68k
DSLAM(config-dsl-prof)# CNTL/z
To set the downstream and upstream minimum or maximum bit rates, use the profile configuration command command cap bitrate. Use the no form of the command to set bit rates to default values.
cap bitrate {minimum | maximum } downstream int upstream int
int | Integer ( any whole, natural number, its negative, or zero) |
| Value Type | Default |
|---|---|
Minimum downstream | 0 kbps |
Minimum upstream | 0 kbps |
Maximum downstream | 640 kbps |
Maximum upstream | 91 kbps |
Profile configuration
| Release | Modification |
|---|---|
12.0(8)DA | This command was introduced. |
The alarm subsystem uses the minimum bitrate settings. The Cisco IOS asserts an alarm if the line card trains at a rate below the configured minimum bitrate.
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Note Refer to Section 7.12, Setting Upstream and Downstream bitrate Parameters, in the Cisco Configuration Guide for DSLAMs with NI-2, for more information about configuring bitrates. |
In this example, the command sets the maximum downstream and upstream bitrates to 7168 kbps, and 1088 kbps respectively:
DSLAM# conf t
DSLAM# dsl-profile issis
DSLAM(config-dsl-prof)# cap bitrate maximum downstream 7168 upstream 1088
DSLAM(config-dsl-prof)# CNTL/z
The CPE signature indicates the CPE equipment supported feature set. To set the CPE signature value for each configuration profile, use the cap cpe-signature command in profile configuration mode. Use the no form of the command to set the CPE signature to the default value.
cap cpe-signature 0-255
0-255 | Range of values for the CPE signature. |
The default value is zero.
Profile configuration
| Release | Modification |
|---|---|
12.0(8)DA | This command was introduced. |
If the CPE signature value returned by the CPE is less than the configured value, training discontinues.
In this example, the command sets the CPE signature to 130 for the DSL profile named issis:
DSLAM# conf t
DSLAM# dsl-profile issis
DSLAM(config-dsl-prof)# cap cpe-signature 130
DSLAM(config-dsl-prof)# CNTL/z
To set the interleaving delay for a profile, use the cap interleaving-delay command in profile configuration mode. Use the no form of the command to set interleaving delay to the default value.
cap interleaving-delay {short | long | none}
short | Turns on Reed-Solomon error correction. |
long | Turns on Reed-Solomon error correction. |
none | Turns off Reed-Solomon error correct. This value is valid only when the downstream baud rate is set to 136k. See the "Usage Guidelines" for details. |
Short
Profile configuration
| Release | Modification |
|---|---|
12.0(8)DA | This command was introduced. |
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 bitrate that uses a baud rate that is other than 136k, the actual interleaving-delay value is "short."
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Note Refer to Section 7.10, Setting the Interleaving Delay in the Cisco Configuration Guide for DSLAMs with NI-2, for more information about configuring interleaving delays. |
In this example the command sets the interleaving-delay value to "none":
DSLAM# conf t
DSLAM# dsl-profile issis
DSLAM(config-dsl-prof)# cap interleaving-delay none
DSLAM(config-dsl-prof)# CNTL/z
To set the upstream and downstream CAP signal-to-noise ratio (SNR) margin values for a selected profile, use the cap margin command. Use the no form of the command to set the margins to the default values.
cap margin downstream cap-margin upstream cap-margin
cap-margin | Enter the upstream and downstream SNR margins in decibels. The range of values is 0 to 12. |
6 dB downstream
6 dB upstream
Profile configuration
| Release | Modification |
|---|---|
12.0(8)DA | This command was introduced. |
SNR margin values are in decibels.
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Note Refer to Section 7.11, Setting Signal-to-Noise Ratio Margins in the Cisco Configuration Guide for DSLAMs with NI-2, for more information about configuring SNR margins. |
In this example, the command sets the SNR margin at 8 dB downstream and 5 dB upstream for the DSL profile issis:
DSLAM# conf t
DSLAM# dsl-profile issis
DSLAM(config-dsl-prof)# cap margin downstream 8 upstream 5
DSLAM(config-dsl-prof)# CNTL/z
To set th CAP power spectral density mask (PSDM) upstream and downstream values, use the cap psdm command in profile configuration mode. Use the no form of the command to set PSDM to default values.
cap psdm downstream int upstream int
int | Integer ( any whole, natural number, its negative, or zero) |
-37 dB downstream
-38 dB upstream
Profile configuration
| Release | Modification |
|---|---|
12.0(8)DA | This command was introduced. |
PSDM values are in decibels.
In this example, the command sets the CAP PSDM value at -40 dB downstream and -41 dB upstream:
DSLAM# conf t
DSLAM# dsl-profile issis
DSLAM(config-dsl-prof)# cap psdm downstream -40 upstream -41
DSLAM(config-dsl-prof)# CNTL/z
Posted: Wed Jul 24 11:48:53 PDT 2002
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