Troubleshooting guide

F-2
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Appendix
Gathering Information about Your Internetwork
Specific information that might be needed by technical support varies, depending on the situation, and
include the following:
• Output from the following general show commands:
show interfaces
show controllers [atm | serial | e1 | ethernet]
show processes [cpu | mem]
show buffers
show memory summary
• Output from the following protocol-specific show commands:
show protocol route
show protocol traffic
show protocol interface
show protocol arp
• Output from relevant debug privileged EXEC commands
• Output from protocol-specific ping and trace command diagnostic tests, as applicable
• Network analyzer traces, as applicable
• Core dumps obtained by using the exception dump switch configuration command, or by using the
write core switch configuration command if the system is operational, as appropriate
Getting the Data from Your Switch Router
When obtaining information from your switch router, tailor your method to the system that you are using
to retrieve the information. Following are some hints for different platforms:
• PC and Macintosh—Connect a PC or Macintosh to the console port of the switch router and log all
output to a disk file (using a terminal emulation program). The exact procedure varies depending on
the communication package used with the system.
• Terminal connected to console port or remote terminal—The only way to get information with a
terminal connected to the console port or with a remote terminal is to attach a printer to the AUX
port on the terminal (if one exists) and to force all screen output to go to the printer. Using a terminal
is undesirable because there is no way to capture the data to a file.
• UNIX workstation—At the UNIX prompt, enter the script filename command, then use Telnet to
connect to the switch router. The UNIX script command captures all screen output to the specified
filename. To stop capturing output and close the file, enter the end-of-file character (typically ^D)
for your UNIX system.
Note To get your system to automatically log specific error messages or operational information to a UNIX
syslog server, use the logging internet-address switch configuration command. For more information
about using the logging command and setting up a syslog server, refer to the Cisco IOS configuration
guides and command reference publications.