Conditional debugging is used to filter debugging messages:
R#debug condition ? application Application called called number calling calling card card glbp interface group interface interface ip IP address mac-address MAC address match-list apply the match-list standby interface group username username vcid VC ID vlan vlan voice-port voice-port number xconnect Xconnect conditional debugging on segment pair A quick example: filter RIP events only for interface Serial1/1.
We just need to enable a debug condition for interface S1/1: