The show tech-support command outputs the equivalent of the show version, show running-config, show controllers, show stacks, show interfaces, show buffers, show process memory, and show process cpu EXEC commands. In addition, show tech-support also provides some platform-specific information that is not provided in the previous commands.
Specific requirements that vary depending on the situation include the following output from general and specific SHOW commands:
Getting the Data from Your Router
You must tailor the way you obtain information from the router to the system you are using to retrieve the information. Following are some hints for different platforms:
How Do I Get an Exception or Core Dump?
To obtain a core dump when a router crashes, use the exception dump ip-address router configuration command (where ip-address is the address of your TFTP server). To get a core dump, add this command to your configuration: exception dump x.x.x.x, where x.x.x.x is the address of your TFTP server. The core dump will be written to <hostname>-core where <hostname> is the name of the router as given with the hostname configuration command. This will cause the router to attempt to make a core dump if it crashes. This can fail if the router is sufficiently confused. The core dump file will be the size of memory available on the processor (for example, 4MB for a CSC/3). Depending on your TFTP server, you might also have to create these files before the router can write to them. You can test this by trying the TFTP put command from a workstation. You can also test crash dumps with the EXEC command write core. This will cause the router to generate a crash dump and is useful if the router is problematic, but has not crashed.
Cisco Connection Online (CCO)
Cisco Connection Online (CCO), formerly Cisco Information Online (CIO), is Cisco Systems primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional content and services.
Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added services to Ciscos customers and business partners. CCO services include product information, software updates, release notes, technical tips, the Bug Navigator, the Troubleshooting Engine, configuration notes, brochures, descriptions of service offerings, and download access to public and authorized files.
CCO serves a variety of users through two interfaces that are updated and enhanced simultaneouslya character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, Internet e-mail, and fax download options, and is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.
Accessing Cisco Connection Online (CCO)
You can access CCO in the following ways:
For a copy of CCOs Frequently Asked Questions (FAQ), send e-mail to firstname.lastname@example.org. For additional information, send e-mail to email@example.com.