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Table Of Contents

Configuring ATM Interfaces

Network Configuration Example

Disabling Autoconfiguration

Configuring UNI Interfaces

Configuring NNI Interfaces

Configuring IISP Interfaces

Configuring a Public Network Tunnel Interface

Configuring Signaling VPCI for PVP Tunnels

Deleting VP Tunnels

Configuring a PVC to a VP Tunnel

Configuring a VPI or VCI Range for SVPs or SVCs


Configuring ATM Interfaces

This chapter describes how to explicitly configure ATM network interface types. Explicitly configuring interfaces is the alternative to Interim Local Management Interface (ILMI) autoconfiguration, which senses the peer interface type and appropriately configures the Cisco 6000 family DSLAM interface.

Use the network configuration tasks described in this chapter to explicitly change your ATM DSLAM operation from the defaults, which are suitable for most networks. This chapter includes these sections:

• Network Configuration Example

• Disabling Autoconfiguration

• Configuring UNI Interfaces

• Configuring NNI Interfaces

• Configuring IISP Interfaces

• Configuring a Public Network Tunnel Interface

• Configuring Signaling VPCI for PVP Tunnels

• Configuring a VPI or VCI Range for SVPs or SVCs

Network Configuration Example

The sample network shown in Figure 8-1 illustrates some standard ATM interface configuration tasks you can perform after you complete the initial DSLAM configuration. See Chapter 3, "Initially Configuring the Cisco DSLAM."

Figure 8-1 Sample Network Configuration

The network configuration shown in Figure 8-1 is an example of a corporate campus ATM backbone network connecting three buildings with an ATM connection across the WAN to a remote sales office.

The remaining sections in this chapter describe a possible configuration of the network that appears in Figure 8-1.

Disabling Autoconfiguration

When an interface comes up initially, autoconfiguration determines the type of interface. To configure the interface protocol on an interface, you must first disable the autoconfiguration feature.

To disable autoconfiguration on an interface, perform these steps, beginning in global configuration mode:

Step
Command
Task

1.

interface atm slot/port[.vpt#]

Select the interface to be configured.

2.

no atm auto-configuration

Disable autoconfiguration on the interface.


Example

In this example, autoconfiguration is disabled on interface ATM 0/1 and the results are as follows:

DSLAM(config)# interface atm 0/1
DSLAM(config-if)# no atm auto-configuration
DSLAM(config-if)#
%ATM-6-ILMINOAUTOCFG: ILMI(ATM0/1): Auto-configuration is disabled, current interface parameters will be used at next interface restart.

DSLAM# atm interface atm 0/1

Interface: ATM0/1 Port-type: suni_dual
IF Status: UP Admin Status: up
Auto-config: disabled AutoCfgState: not applicable
IF-Side: Network IF-type: NNI
Uni-type: not applicable Uni-version: not applicable
Max-VPI-bits: 8 Max-VCI-bits: 14
Max-VP: 255 Max-VC: 16383
Svc Upc Intent: pass Signalling: Enabled
ATM Address for Soft VC: 47.0091.8100.0000.0040.0b0a.2b81.4000.0c80.8000.00
Configured virtual links:
PVCLs SoftVCLs SVCLs PVPLs SoftVPLs SVPLs Total-Cfgd Installed-Conns
3 0 0 0 0 0 3 3
Logical ports(VP-tunnels): 0
Input cells: 234663 Output cells: 235483
5 minute input rate: 0 bits/sec, 0 cells/sec
5 minute output rate: 0 bits/sec, 0 cells/sec
Input AAL5 pkts: 153211, Output AAL5 pkts: 153626, AAL5 crc errors: 0

Configuring UNI Interfaces

The UNI specification defines communications between ATM end stations (such as workstations and routers) and ATM switches in private ATM networks. (The DSLAM functions as an ATM switch.)

To configure a UNI interface between the DSLAM (HB-1) in the headquarters building to the Cisco 7000 (HB-1) in the same building, use the atm uni command in interface configuration mode. Figure 8-2 shows a detail of this type of network connection.

Figure 8-2 Multiple Link UNI Example

To configure the UNI interface, perform these steps, beginning in global configuration mode:

Step
Command
Task

1.

interface atm slot/port

Select the interface to be configured.

2.

no atm auto-configuration

Disable autoconfiguration on the interface.

3.

atm uni [side {network | user}]
[type {private | public}]
[version {3.0 | 3.1 | 4.0}]

Configure the ATM UNI interface.


Note Each time you configure a change in the interface protocol (such as UNI, NNI, or IISP), side, or version, ATM signaling and ILMI is restarted on the interface. When you restart ATM signaling, the DSLAM clears all switched virtual connections (SVCs) across the interface. Permanent virtual connections are not affected.

Example

This example disables autoconfiguration on ATM interface 0/1 and to configure the interface as the user side of a private UNI running Version 4.0:

DSLAM(HB-1)(config)# interface atm 0/1
DSLAM(HB-1)(config-if)# no atm auto-configuration
DSLAM(HB-1)(config-if)#
%ATM-6-ILMINOAUTOCFG: ILMI(ATM0/1): Auto-configuration is disabled, current interface parameters will be used at next interface restart.
DSLAM(HB-1)(config-if)# atm uni side user type private version 4.0
DSLAM(HB-1)(config-if)#
%ATM-5-ATMSOFTSTART: Restarting ATM signalling and ILMI on ATM0/1.

To show the ATM interface UNI configuration, use this EXEC command:

Command
Task

show atm interface atm slot/port

Show the ATM switch configuration.


Example

This example displays the ATM interface 0/1 UNI configuration:

DSLAM(HB-1)# show atm interface atm 0/1

Interface: ATM0/1        Port-type: suni_dual
IF Status: UP Admin Status: up
Auto-config: disabled AutoCfgState: not applicable
IF-Side: User IF-type: UNI
Uni-type: Private Uni-version: V4.0
Max-VPI-bits: 8 Max-VCI-bits: 14
Max-VP: 255 Max-VC: 16383
Svc Upc Intent: pass Signalling: Enabled
ATM Address for Soft VC: 47.0091.8100.0000.0040.0b0a.2b81.4000.0c80.8000.00
Configured virtual links:
PVCLs SoftVCLs SVCLs PVPLs SoftVPLs SVPLs Total-Cfgd Installed-Conns
2 0 0 0 0 0 2 2
Logical ports(VP-tunnels): 0
Input cells: 234810 Output cells: 235618
5 minute input rate: 0 bits/sec, 0 cells/sec
5 minute output rate: 0 bits/sec, 0 cells/sec
Input AAL5 pkts: 153296, Output AAL5 pkts: 153712, AAL5 crc errors: 0

Configuring NNI Interfaces

This section describes the configuring of a Network-to-Network Interface (NNI) connection between two switches. The example in this section involves the configuring of a Private NNI (PNNI) interface from the DSLAM (HB-1) in the headquarters building to the DSLAM (EB-1) in the Engineering building, as shown in Figure 8-3.

Figure 8-3 Private NNI Interface Example

You must configure PNNI connections between the ATM switches to allow for route discovery and topology analysis between the switches. To configure the NNI interface, perform these steps, beginning in global configuration mode:

Step
Command
Task

1.

interface atm slot/port

Select the interface to be configured.

2.

no atm auto-configuration

Disable autoconfiguration on the interface.

3.

atm nni

Configure the ATM NNI interface.


Note Each time you configure a change in the interface protocol (such as UNI, NNI, or IISP), side, or version, ATM signaling and ILMI is restarted on the interface. When you restart ATM signaling, the DSLAM clears all switched virtual connections (SVCs) across the interface. Permanent virtual connections are not affected.

Example

This example configures ATM interface 0/1 on the DSLAM located in the headquarters building as an NNI interface and displays the results:

DSLAM(HB-1)(config)# interface atm 0/1
DSLAM(HB-1)(config-if)# no atm auto-configuration
DSLAM(HB-1)(config-if)#
%ATM-6-ILMINOAUTOCFG: ILMI(ATM0/1): Auto-configuration is disabled, current interface parameters will be used at next interface restart.
DSLAM(HB-1)(config-if)# atm nni
DSLAM(HB-1)(config-if)#
%ATM-5-ATMSOFTSTART: Restarting ATM signalling and ILMI on ATM0/1.

DSLAM(HB-1)# show atm interface atm 0/1

Interface: ATM0/1    Port-type: suni_dual
IF Status: UP Admin Status: up
Auto-config: disabled AutoCfgState: not applicable
IF-Side: Network IF-type: NNI
Uni-type: not applicable Uni-version: not applicable
Max-VPI-bits: 8 Max-VCI-bits: 14
Max-VP: 255 Max-VC: 16383
Svc Upc Intent: pass Signalling: Enabled
ATM Address for Soft VC: 47.0091.8100.0000.0040.0b0a.2b81.4000.0c80.8000.00
Configured virtual links:
PVCLs SoftVCLs SVCLs PVPLs SoftVPLs SVPLs Total-Cfgd Installed-Conns
3 0 0 0 0 0 3 3
Logical ports(VP-tunnels): 0
Input cells: 234911 Output cells: 235695
5 minute input rate: 0 bits/sec, 0 cells/sec
5 minute output rate: 0 bits/sec, 0 cells/sec
Input AAL5 pkts: 153346, Output AAL5 pkts: 153764, AAL5 crc errors: 0

Configuring IISP Interfaces

This section describes how to configure the Interim Interswitch Signaling Protocol (IISP) interface from the DSLAM (SB-1) in the Remote Sales building to the DSLAM (SB-1) in the same building. Figure 8-4 shows an example of this type of network configuration.

Figure 8-4 IISP Network Segment Example

Some ATM switches do not support the Private Network-to-Network Interface (PNNI) protocol. Switched virtual circuit (SVC) support can be provided by configuring the interface to use IISP.

To configure the IISP interfaces in Figure 8-4, perform these tasks, beginning in global configuration mode:

Step
Command
Task

1.

interface atm slot/port[.sub_inter#]

Select the interface to be configured.

2.

no atm auto-configuration

Disable autoconfiguration on the interface.

3.

atm iisp [side {network | user}]
[version {3.0 | 3.1 | 4.0}]

Configure the ATM IISP interface.

4.

exit

Exit interface configuration mode.

5.

atm route prefix atm-address-prefix atm slot/port[.sub_inter#]

Configure the ATM route address prefix.


Note Each time you configure a change in the interface protocol (such as UNI, NNI, or IISP), side, or version, ATM signaling and ILMI is restarted on the interface. When you restart ATM signaling, the DSLAM clears all switched virtual connections (SVCs) across the interface. Permanent virtual connections are not affected.

Example

This example configures ATM interface 0/1 on the DSLAM (SB-1) located in the Remote Sales building with these parameters, and displays the results:

•No autoconfiguration

•IISP

•Side as user

•ATM route address prefix as 47.0091.8100.0000.0000.0ca7.ce01

DSLAM(SB-1)(config)# interface atm 0/1
DSLAM(SB-1)(config-if)# no atm auto-configuration
DSLAM(SB-1)(config-if)#
%ATM-6-ILMINOAUTOCFG: ILMI(ATM0/1): Auto-configuration is disabled, current interface parameters will be used at next interface restart.
DSLAM(SB-1)(config-if)# atm iisp side user
DSLAM(SB-1)(config-if)#
%ATM-5-ATMSOFTSTART: Restarting ATM signalling and ILMI on ATM0/1.
DSLAM(SB-1)(config-if)# exit
DSLAM(SB-1)(config)# atm route 47.0091.8100.0000.0000.0ca7.ce01 atm 0/1

DSLAM(SB-1)(config)# show atm int 0/1

Interface: ATM0/1 Port-type: suni_dual
IF Status: DOWN Admin Status: down
Auto-config: disabled AutoCfgState: not applicable
IF-Side: User IF-type: IISP
Uni-type: not applicable  Uni-version:  V3.0
Max-VPI-bits: 8 Max-VCI-bits: 14
Max-VP: 255 Max-VC: 16383
Svc Upc Intent: pass Signalling: Enabled
ATM Address for Soft VC: 47.0091.8100.0000.0040.0b0a.2b81.4000.0c81.8000.00
Configured virtual links:
PVCLs SoftVCLs SVCLs PVPLs SoftVPLs SVPLs Total-Cfgd Installed-Conns
2 0 0 0 0 0 2 0
Logical ports(VP-tunnels): 0
Input cells: 0 Output cells: 0
5 minute input rate: 0 bits/sec, 0 cells/sec
5 minute output rate: 0 bits/sec, 0 cells/sec
Input AAL5 pkts: 0, Output AAL5 pkts: 0, AAL5 crc errors: 0

Configuring a Public Network Tunnel Interface

This section describes how to configure the DS3 public UNI ATM connection as a virtual path (VP) tunnel from the headquarters building across the WAN to the Remote Sales building.

Note A VP tunnel is configured as a VP of a particular service category. Only virtual circuits (VCs) of that service category can transit the tunnel.

Figure 8-5 shows a detail of the sample network you are configuring.

Figure 8-5 Public VP Tunnel Network Example

Public DS3 carriers can interconnect switches using permanent VPs across their networks. To support signaling across the public network between the DSLAM (HB-1) in the headquarters building and the Remote Sales building the DSLAM (SB-1), you must configure a VP tunnel.

Assigning VPI Values to Shaped VP Tunnels

If you configure VP tunnels with traffic shaping, you can use only 32 VPIs, even though the full range of VPI values is 0 to 255. If you have not yet assigned any VPIs, all values from 0 to 255 are available. Once you start assigning VPIs, however, the assigned VPIs limit the VPIs that remain. (You assign VPIs using the atm pvp or atm pvc commands.)

After a particular VPI value is assigned to a shaped VP tunnel, every 32nd VPI value above and below the first one is eliminated—that is, the original value modulo 32. For example, if you assign VPI 94 to a shaped VP tunnel, the following VPI values become unavailable for any purpose: 30, 62, 126, 158, 190, and 222.

To avoid problems, choose a block of 32 consecutive VPI values (for example, 0 to 31 or 101 to 132). The software rejects invalid VPI values.

To configure a VP tunnel connection, perform these steps, beginning in global configuration mode:

Step
Command
Task

1.

atm connection-traffic-table-row [index row-index] cbr pcr rate [tolerance cell-count]

Optionally, configure the connection-traffic-table-row index for any nondefault index values.

2.

interface atm slot/port

Select the physical interface to be configured.

3.

atm pvp vpi [rx-cttr index] [tx-cttr index]

Configure an interface permanent virtual path (PVP) leg.

4.

exit

Change to configuration mode.

5.

interface atm slot/port.vpt#

Create a VP tunnel using a VPT number that matches the PVP leg virtual path identifier (VPI).


Note You must configure the row index for no-default rx-cttr and tx-cttr before you use this optional parameter.

Examples

This example configures the ATM VP tunnel on the DSLAM (HB-1) located in the headquarters building at interface 0/1, VPI 99 to the DSLAM (SB-1) located in the Remote Sales building at interface 0/1, VPI 99:

DSLAM(HB-1)(config)# interface atm 0/1
DSLAM(HB-1)(config-if)# atm pvp 99
DSLAM(HB-1)(config-if)# exit
DSLAM(HB-1)(config)# interface atm 0/1.99
DSLAM(HB-1)(config-subif)# end
DSLAM(HB-1)#
%SYS-5-CONFIG_I: Configured from console by console

This example configures the ATM VP tunnel on the DSLAM (SB-1), located in the Remote Sales building at interface 0/1, VPI 99:

DSLAM(SB-1)(config)# interface atm 0/1
DSLAM(SB-1)(config-if)# atm pvp 99
DSLAM(SB-1)(config-if)# exit
DSLAM(SB-1)(config)# interface atm 0/1.99
DSLAM(SB-1)(config-subif)# end
DSLAM(SB-1)#
%SYS-5-CONFIG_I: Configured from console by console

To show the ATM virtual interface configuration, use this EXEC command:

Command
Task

show atm interface [atm slot/port[.vpt#]]

Show the ATM interface configuration.


Example

This example displays the configuration of the DSLAM (HB-1), located in the headquarters building at interface  0/1:

DSLAM(HB-1)# show atm interface atm 0/1

Interface: ATM0/1          Port-type: vp tunnel
IF Status: UP Admin Status: up
Auto-config: enabled AutoCfgState: waiting for response from peer
IF-Side: Network IF-type: UNI
Uni-type: Private Uni-version: V3.0
Max-VPI-bits: 0 Max-VCI-bits: 14
Max-VP: 0 Max-VC: 16383
Signalling: Enabled
ATM Address for Soft VC: 47.0091.8100.0000.0040.0b0a.2b81.4000.0c80.8000.63
Configured virtual links:
PVCLs SoftVCLs SVCLs Total-Cfgd Installed-Conns
4 0 0 4 4

Configuring Signaling VPCI for PVP Tunnels

To specify the value of the virtual path connection identifier (VPCI) that is to be carried in the signaling messages within a VP tunnel, use the atm signalling vpci interface configuration command.

Note By default, the VPCI is the same as the VPI on the ATM switch.

The connection identifier information element (IE) is used in signaling messages to identify the corresponding user information flow. The connection identifier IE contains the VPCI and VCI.

For example, if you want to configure a PVP tunnel connection from a DSLAM on VPI 2, VCI X, to a router with a virtual path switch in between, the signaling message must contain connection ID, VPI 2, VCI X. Because the PVP tunnel at the router end is on VPI 3, VCI X, the connection is refused. By configuring VPCI to 3, you can configure the signaling message explicitly to contain connection ID VPI 3, VCI X, instead of containing VPI 2, VCI X.

You can also use this command to support virtual User-Network Interface (UNI) connections.

To configure a VP tunnel connection signaling VPCI, perform these steps, beginning in global configuration mode:

Step
Command
Task

1.

interface atm slot/port.vpt#

Select the subinterface.

2.

atm signalling vpci vpci_number

Configure the atm signaling VPCI number. The range is from 0 to 255.


Example

This example configures a PVP tunnel on ATM interface 0/1, PVP 99, and then configures the connection ID VCPI as 0 in interface configuration mode.

Switch(config)# interface atm 0/1
Switch(config-if)# atm pvp 99
Switch(config-if)# exit
Switch(config)# interface atm 0/1.99
Switch(config-subif)# atm signalling vpci 0

To confirm the PVP tunnel VPCI configuration, use this privileged EXEC command:

Command
Task

show running-config

Show the PVP tunnel interface configuration.


Deleting VP Tunnels

To delete a VP tunnel connection, perform these steps, beginning in global configuration mode:

Step
Command
Task

1.

no interface atm slot/port[.vpt#]

Delete the interface.

2.

interface atm slot/port

Select the physical interface to be modified.

3.

no atm pvp vpi

Delete the interface PVP half-leg.


Example

This example deletes subinterface 99 at ATM interface 0/1 and the PVP half-leg 99 on the DSLAM (HB-1) and displays the results:

DSLAM(HB-1)(config)# no interface atm 0/1.99
DSLAM(HB-1)(config)# interface atm 0/1
DSLAM(HB-1)(config-if)# no atm pvp 99

DSLAM(HB-1)# show interface atm 0/1

Interface: ATM0/1 Port-type: suni_dual
IF Status: UP Admin Status: up
Auto-config: enabled AutoCfgState: completed
IF-Side: Network IF-type: NNI
Uni-type: not applicable Uni-version: not applicable
Max-VPI-bits: 8 Max-VCI-bits: 14
Max-VP: 255 Max-VC: 16383
Svc Upc Intent: pass Signalling: Enabled
ATM Address for Soft VC: 47.0091.8100.0000.0040.0b0a.2b81.4000.0c80.8000.00
Configured virtual links:
PVCLs SoftVCLs SVCLs PVPLs SoftVPLs SVPLs Total-Cfgd Installed-Conns
3 0 0 0 0 0 3 3
Logical ports(VP-tunnels): 0
Input cells: 233651 Output cells: 234465
5 minute input rate: 0 bits/sec, 0 cells/sec
5 minute output rate: 0 bits/sec, 0 cells/sec
Input AAL5 pkts: 152555, Output AAL5 pkts: 152967, AAL5 crc errors: 0

Configuring a PVC to a VP Tunnel

To configure an endpoint of a permanent virtual circuit (PVC) to a previously created PVP tunnel, perform these steps, beginning in global configuration mode:

Step
Command
Task

1.

interface atm slot/port

Select the physical interface to be configured.

2.

atm pvc vpi vci [upc upc] [pd pd] [rx-cttr index] [tx-cttr index] interface atm slot/port[.vpt#] vpi vci [upc upc]

Configure the PVC with the VPI of the tunnel leg matching the tunnel VPT number.


These restrictions apply to an endpoint of a PVC-to-PVP tunnel subinterface:

•The VPI number of the tunnel leg of any PVC connection must match the VPT number of the tunnel.

•The service class (for example, constant bit rate [CBR]), variable bit rate [VBR], unspecified bit rate [UBR], as specified by the connection-traffic-table-row [CTTR]) of any PVC connections must match the service class for the rows selected for the tunnel PVP.

•For service classes other than UBR and available bit rate (ABR), the peak cell rates of all PVCs must be within the peak cell rate of the tunnel PVP. This setup requires new CTTR rows to be defined for CBR or VBR PVCs, with peak cell rates that are less than the intended tunnel PVP.

Example

This example shows you how to configure the example tunnel ATM0/1.99 with a UBR PVC from interface ATM 0/1 to the tunnel at ATM interface 0/1.99, and displays the results:

DSLAM(HB-1)(config)# interface atm 0/1
DSLAM(HB-1)(config-if)# atm pvc 0 50 interface atm 0/1.99 99 40

DSLAM(HB-1)# show atm vc interface atm 0/1
Interface VPI VCI Type X-Interface X-VPI X-VCI Encap Status
0/1 0 5 PVC 0/1 0 41 QSAAL UP
0/1 0 16 PVC 0/1 0 33 ILMI UP
0/1 0 50 PVC ATM0/1.99 99 40 UP

Configuring a VPI or VCI Range for SVPs or SVCs

You can configure a virtual path identifier or virtual channel identifier (VPI or VCI) range for switched virtual circuits or switched virtual paths (SVCs or SVPs). This feature allows you to

•Specify ranges for SVCs and SVPs.

•Avoid VPI or VCI conflicts when you attempt to set up soft PVCs or soft PVPs. For example, if you specify a soft PVC with VPI 0 and VCI 50 on the destination interface, an SVC on that interface might have already taken VPI 0 and VPI 50 just before the soft PVC setup message arrives at the destination interface. In this case, the soft PVC is rejected because VPI 0 and VPI 50 are already taken. By specifying the VPI or VCI range for SVPs or SVCs, you can avoid connection setup rejections.

You can still configure PVCs and PVPs in any supported range, including any VPI or VCI range you configured for SVCs or SVPs.

Note ILMI Version 4.0 supports this feature.

The default maximum switched virtual path connection (SVPC) VPI is equal to the maximum VPI supported on the interface. You can change the maximum SVPC VPI by entering the atm svpc vpi max value command. Substitute value with:

•A number in range of 0 to 3 for 25-Mbps interfaces.

•A number in range of 0 to 255 for all other interfaces except logical interfaces, which have a fixed value of 0.

The default maximum switched virtual channel connection (SVCC) VPI is equal to the maximum VPI supported on the interface. You can change the maximum SVCC VPI by entering the atm svcc vpi max value command. Substitute value with:

•A number in the range of 0 to 3 for 25-Mbps interfaces.

•A number in the range of 0 to 255 for all other interfaces except logical interfaces, which have a fixed value of 0.

The default minimum SVCC VCI is equal to 35. You can change the minimum SVCC VCI by entering the atm svcc vci min value command. Substitute value with a number in the range of 32 to 4095.

In the example shown in Figure 8-6, the maximum SVCC VPI is 100 and the minimum SVCC VCI is 60. Therefore, VPIs 0 through 100 and VCIs 60 through 16,383 are reserved for SVCCs.

Figure 8-6 Sample SVCC VPI or VCI Range

Each interface negotiates the local values for the maximum SVPC VPI, maximum SVCC VPI, and minimum SVCC VCI with the peer's local value during ILMI initialization. The negotiated values determine the ranges for SVPs and SVCs. If the peer interface does not support these objects or autoconfiguration is turned off on the local interface, the local values determine the range.

To configure a VPI or VCI range for SVCs or SVPs, perform these steps, beginning in global configuration mode:

Step
Command
Task

1.

interface atm slot/port

Select the physical interface to be configured.

2.

atm svpc vpi max value

Configure the maximum VPI value for a SVPC.

3.

atm svcc vpi max value

Configure the maximum VPI value for a SVCC.

4.

atm svcc vci min value

Configure the minimum VCI value for a SVCC.


To confirm the VPI or VCI range configuration, use one of these commands:

Command
Task

show atm interface atm slot/port

Show the ATM interface configuration.

show atm ilmi-status atm slot/port

Show the ILMI status on the ATM interface.


Examples

This example confirms the VPI or VCI range configuration on an ATM interface. The values displayed for ConfMaxSvpcVpi, ConfMaxSvccVpi, and ConfMinSvccVci are local values. The values displayed for CurrMaxSvpcVpi, CurrMaxSvccVpi, and CurrMinSvccVci are negotiated values.

Switch# show atm interface atm 0/0

Interface: ATM0/0 Port-type: suni_dual
IF Status: DOWN Admin Status: down
Auto-config: enabled AutoCfgState: waiting for response from peer
IF-Side: Network IF-type: UNI
Uni-type: Private Uni-version: V3.0
Max-VPI-bits: 8 Max-VCI-bits: 14
Max-VP: 255 Max-VC: 16383
ConfMaxSvpcVpi: 100 CurrMaxSvpcVpi: 100
ConfMaxSvccVpi: 100 CurrMaxSvccVpi: 100
ConfMinSvccVci: 60 CurrMinSvccVci: 60
Svc Upc Intent: pass Signalling: Enabled
ATM Address for Soft VC: 47.0091.8100.0000.0040.0b0a.2a81.4000.0c80.0000.00
Configured virtual links:
PVCLs SoftVCLs SVCLs TVCLs PVPLs SoftVPLs SVPLs Total-Cfgd Inst-Conns
3 0 0 0 0 0 0 3 0
Logical ports(VP-tunnels): 0
Input cells: 0 Output cells: 0
5 minute input rate: 0 bits/sec, 0 cells/sec
5 minute output rate: 0 bits/sec, 0 cells/sec
Input AAL5 pkts: 0, Output AAL5 pkts: 0, AAL5 crc errors: 0

This example confirms the peer's local values for VPI or VCI range configuration by displaying the ILMI status on an ATM interface:

Switch# show atm ilmi-status atm 0/0

Interface : ATM0/0 Interface Type : Private NNI
ILMI VCC : (0, 16) ILMI Keepalive : Disabled
Addr Reg State: UpAndNormal
Peer IP Addr: 172.20.40.232 Peer IF Name: ATM0/0
Peer MaxVPIbits: 8 Peer MaxVCIbits: 14
Peer MaxVPCs: 255             Peer MaxVCCs: 16383
Peer MaxSvccVpi: 255             Peer MinSvccVci: 255
Peer MaxSvpcVpi: 48
Configured Prefix(s) :
47.0091.8100.0000.0010.11ba.9901

Note Note that the show atm ilmi-status command displays the information above only if the peer supports it.

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Posted: Fri Dec 3 13:57:29 PST 2004
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