BETA DRAFT - CISCO CONFIDENTIAL
14-6
Cisco1800 Series Integrated Services Routers (Fixed) Software Configuration Guide
OL-6426-02
Chapter14 Troubleshooting
ATM Troubleshooting Commands
Table14-2 describes some of the fields shown in the command output.
debug atm Commands
Use the debug commands to troubleshoot configuration problems that you might be having on your
network. The debug commands provide extensive, informative displays to help you interpret any
possible problems.

Guidelines for Using Debug Commands

Read the following guidelines before using debug commands to ensure appropriate results.
•All debug commands are entered in privileged EXEC mode.
•To view debugging messages on a console, enter the logging console debug command.
•Most debug commands take no arguments.
•To disable debugging, enter the undebug all command.
•To use debug commands during a Telnet session on your router, enter the terminal monitor
command.
Caution Debugging is assigned a high priority in your router CPU process, and it can render your router unusable.
For this reason, use debug commands only to troubleshoot specific problems. The best time to use debug
commands is during periods of low network traffic so that other activity on the network is not adversely
affected.
You can find additional information and documentation about the debug commands in the Cisco IOS
Debug Command Reference.

debug atm errors Command

Use the debug atm errors command to display ATM errors. The no form of this command disables
debugging output. Example 14-4 shows a sample output.
Table14-2 show atm interface Command Output Description
Field Description
ATM interface Interface number. Always 0 for the Cisco1800 fixed-configuration routers.
AAL enabled Type of AAL enabled. The Cisco1800 fixed-configuration routers support AAL5.
Maximum VCs Maximum number of virtual connections this interface supports.
Current VCCs Number of active virtual channel connections (VCCs).
Maximum
Transmit
Channels
Maximum number of transmit channels.
Max Datagram
Size
Configured maximum number of bytes in the largest datagram.
PLIM Type Physical layer interface module (PLIM) type.