Asynchronous Transfer Mode Configuration Guide, Cisco IOS XE Release 3S
ATM Conditional Debug Support
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ATM Conditional Debug Support

ATM Conditional Debug Support

Most ATM debugging commands are implemented either at the system level or at the interface level. The ATM Conditional Debug Support feature allows debugging to be limited specifically to an ATM interface, to a virtual channel identifier (VCI), or to a virtual path identifier/virtual channel identifier (VPI/VCI) pair, through use of the debug condition interface command.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

Prerequisites for ATM Conditional Debug Support

One or more ATM-encapsulated interfaces must be enabled, and one or more of the following debug commands must be enabled, to use the ATM Conditional Debug Support feature:

  • debug atm arp
  • debug atm counters
  • debug atm errors
  • debug atm events
  • debug atm oam
  • debug atm packet
  • debug atm state

Restrictions for ATM Conditional Debug Support

  • Only the ATM debugging commands listed in the Prerequisites for ATM Conditional Debug Support section can use the ATM Conditional Debug Support feature.
  • Conditional debugging for virtual circuits (VCs) can be enabled only for permanent virtual circuits (PVCs). Switched virtual circuits (SVCs) are not supported.

Information About ATM Conditional Debug Support

ATM Debugging Extended to the VC Level

The ATM debug commands are implemented either at the interface level or at the system level. The debug command output at these levels is not very useful when the user is interested in a particular set of virtual circuits (VCs).

The Cisco IOS XE software has the infrastructure to support conditional debugging based on various filters that are set at the command-line interface (CLI). The conditional debugging infrastructure can filter out or suppress unwanted messages from the output of any existing debug command. The ATM Conditional Debug Support feature extends this infrastructure to support conditional debugging at the ATM VC level by extending the debug condition interface command with keywords that address specific virtual circuits. This feature can be implemented on top of conventional debugging, so that backward compatibility is ensured and at the same time applications can take advantage of conditional debugging where required. However, the extended debug condition interface command has priority over the older version of the command; that is, a debug condition setting using the older debug condition interface command will be discarded as soon as a new debug condition is enabled on a virtual circuit.

How to Configure ATM Conditional Debugging on ATM Interfaces

Enabling Debugging for the ATM Interface

Perform this task to enable conditional debugging on a set of specified interfaces.

Before You Begin

You must enable ATM debugging and specify the conditions (interface, VCI, or VPI/VCI pair) for the ATM Conditional Debug Support feature to work.

SUMMARY STEPS

    1.    enable

    2.    debug atm [arp | counters | errors | events | oam | packet | state]

    3.    debug condition interface interface-type interface-number [vc {vci | vpi / vci}]


DETAILED STEPS
     Command or ActionPurpose
    Step 1 enable


    Example:
    Router> enable
     

    Enables privileged EXEC mode.

    • Enter your password if prompted.
     
    Step 2 debug atm [arp | counters | errors | events | oam | packet | state]


    Example:
    Router# debug atm state
     

    Displays various ATM events.

     
    Step 3 debug condition interface interface-type interface-number [vc {vci | vpi / vci}]


    Example:
    Router# debug condition interface ATM1/1/0 vc 10/100
     

    Limits output for debugging according to the interface or ATM VC number.

     

    Configuration Examples for ATM Conditional Debug Support

    Enabling Debugging for an ATM Interface and VPI VCI Pair Example

    The following example shows how to enable an ATM interface, specify an IP address for the interface, enable conditional debugging for that interface with a VPI/VCI pair of 10/100, and verify that debugging has been enabled:

    Enter configuration commands, one per line. End with CNTL/Z. 
    Router(config)# interface atm 1/1/0.100 point-to-point
     
    Router(config-if)# ip address 10.0.0.5 255.255.255.0 
    Router(config-if)# pvc 10/100
     
    Router(config-if-atm-vc)# no shutdown
     
    Router(config-if)# exit
     
    Router(config)# exit
     
    Router# 
    Router# debug atm state
     
    ATM VC States debugging is on 
    Router# debug condition interface ATM1/1/0 vc 10/100
     
    Condition 1 set 
    Router# 

    Enabling Debugging for a Specific VCI Example

    The following example shows how to enable conditional debugging on a specific VCI. Note that when you enable conditional debugging on a specific VCI alone, the VPI value is automatically set to 0.

    Router# debug condition interface atm 1/0 vc 4335 
    Condition 1 set
    Router# configure terminal
    Enter configuration commands, one per line. End with CNTL/Z.
    Router(config)# interface atm 1/0
    Router(config-if)# pvc 4335
    Router(config-if-atm-vc)# end
    Router#
    *Jul 12 21:46:52.487: atmdx_setup_vc(ATM1/0): vc=5, vpi=0, vci=4335,  config_status=0
    *Jul 12 21:46:52.487: atmdx_setup_cos(ATM1/0): vc=5, wred_name=, max_q=0
    *Jul 12 21:46:52.487: ATM VC Debug: Condition 1, atm-vc 0/4335 AT1/0 triggered, count 1
    *Jul 12 21:46:52.487: ATM1/0 Current Active VC count 4
     
    *Jul 12 21:46:52.487:  ATM VC notification event 0
    *Jul 12 21:46:52.487: atmdx_platform_set_vc_state(ATM1/0): Setting the VC 5 state to UP
    *Jul 12 21:46:52.487: ATM: PVC activated, ATM1/0 VCD 5 (0/4335)
    *Jul 12 21:46:52.487:  ATM VC notification event 2
    *Jul 12 21:46:52.487: %SYS-5-CONFIG_I: Configured from console by console
    Router# show atm vc
    Codes: DN - DOWN, IN - INACTIVE 
     
               VCD /                                            Peak Av/Min Burst
    Interface  Name         VPI   VCI Type    Encaps     SC     Kbps   Kbps Cells St
    1/0        1              0    16 PVC     ILMI       UBR  149760              UP
    1/0.10     4              0   100 PVC     SNAP       UBR  149760              UP
    1/0        5              0  4335 PVC     SNAP       UBR  149760              UP
    1/0.1      one            1    40 PVC     SNAP       UBR  149760              UP
    1/0        2              3   100 PVC-A   SNAP       VBR    1000   1000     0 IN
    4/ima1     1             23    34 PVC     SNAP       UBR       0              IN

    Additional References

    Related Documents

    Related Topic

    Document Title

    Conditionally triggered debugging

    "Conditionally Triggered Debugging" chapter in the Cisco IOS Debug Command Reference

    ATM Overview

    Overview of the ATM SPAs

    ATM commands: complete command syntax, defaults, command mode, command history, usage guidelines, and examples.

    Cisco IOS Asynchronous Transfer Mode Command Reference

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    http:/​/​www.cisco.com/​go/​mibs

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    Feature Information for ATM Conditional Debug Support

    The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

    Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

    Table 1 Feature Information for ATM Conditional Debug Support

    Feature Name

    Releases

    Feature Information

    ATM Conditional Debug Support

    Cisco IOS XE Release 2.3

    ATM Conditional Debug Support feature allows debugging to be limited specifically to an ATM interface, to a VCI, or to a VPI/VCI pair.

    The following commands are introduced or modified in the feature: debug condition interface, show debug.