Troubleshooting guide

F-1
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
APPENDIX F
Technical Support
When you have a problem that you cannot resolve, contact customer service. To help resolve these
problems, gather relevant information about your network prior to calling.
Gathering Information about Your Internetwork
Before gathering any specific data, compile a list of all symptoms users have reported on the
internetwork (such as connections dropping or slow host response).
The next step is to gather specific information. Typical information needed to troubleshoot
internetworking problems fall into two general categories: information required for any situation and
information specific to the topology, technology, protocol, or problem.
Information that is always required by technical support engineers includes the following:
• Configuration listing of all switch routers involved
• Complete specifications of all switch routers involved
• Version numbers of software (obtained by using the show version command) and Flash code
(obtained by using the show controllers command) on all relevant switch routers
• Network topology map
• List of hosts and servers (host and server type, number on network, description of host operating
systems that are implemented)
• List of network layer protocols, versions, and vendors
To assist you in gathering this required data, the show tech-support EXEC command has been added in
Cisco IOS Release 11.1(4) and later. This command provides general information about the switch router
that you can provide to your technical support representative when you are reporting a problem.
The show tech-support command display includes the show version, show hardware, show diag
power-on, show running-config, show controllers, show stacks, show interfaces, show buffers, show
process memory, and show process EXEC commands.