The debug commands in the classic CLI are available by entering the debug configuration context.
Debugging configuration is not persistent across CPM switchovers or router reboots. The admin debug-save command saves the debugging configuration to config.dbg at the BOF primary-config location if a URL is not specified. The show debug command displays debugging information.
To display debugging output, configure a log using the from debug-trace command and then view the output of the log.
For a description of individual debug commands, see the 7450 ESS, 7750 SR, 7950 XRS, and VSR Classic CLI Command Reference Guide.