Conditional Debug Persistence

Conditional debugging in network devices allows users to set specific conditions that apply to subsequent debug commands. These conditions filter the output of debugging based on criteria like interfaces or protocols. It is important to understand that using the no debug all or undebug all command stops the debugging process but does not remove the set conditions. These conditions remain active and can be viewed using the show debugging condition command, indicating that they function independently from the enabling or disabling of debugging. This separation ensures that once conditions are set, they automatically influence how debugging is executed until explicitly cleared.

https://networklessons.com/cisco/ccie-routing-switching/conditional-debug-cisco-ios-router