Cisco Systems OL-6426-02 manual ATM Troubleshooting Commands, Ping atm interface Command, 14-3

Chapter 14 Troubleshooting

ATM Troubleshooting Commands

BETA DRAFT - CISCO CONFIDENTIAL

For details, see the “PortFast Configuration Error” section in the Spanning Tree Protocol Problems and Related Design Considerations document.

ATM Troubleshooting Commands

Use the following commands to troubleshoot your ATM interface.

•ping atm interface Command

•show interface Command

•show atm interface Command

•debug atm Commands

ping atm interface Command

Use the ping atm interface command to determine whether a particular PVC is in use. The PVC does not need to be configured on the router to use this command. Example 14-1shows the use of this command to determine whether PVC 8/35 is in use.

Example 14-1 Determining If a PVC Is in Use

Router# ping atm interface atm 0 8 35 seg-loopback

Type escape sequence to abort.

Sending 5, 53-byte segment OAM echoes, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 148/148/148 ms

!----This command sends five OAM F5 loopback packets to the DSLAM (segment OAM packets).

If the PVC is configured at the DSLAM, the ping is successful.

!----To test whether the PVC is being used at the aggregator, enter the following command:

Router# ping atm interface atm 0 8 35 end-loopback

Type escape sequence to abort.

Sending 5, 53-byte end-to-end OAM echoes, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 400/401/404 ms

!----This command sends end-to-end OAM F5 packets, which are echoed back by the

aggregator.

show interface Command

Use the show interface command to display the status of all physical ports (Ethernet and ATM) and logical interfaces on the router. Example 14-2shows sample command output.

Example 14-2 Viewing the Status of Selected Interfaces

Router# show interface atm 0

ATM0 is up, line protocol is up

Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide

OL-6426-02 14-3