6ff0e5e8_tware_Releases_12_4_T____Cisco__Purpose
[0] Step 7 [Command or Action] debug condition glbp interface-type interface-number group [forwarder] Example: Router# debug condition glbp fastethernet 0/0 10 1 [Purpose] 
Displays debugging messages about GLBP conditions. Try to enter only specific debug condition glbpor debug glbpcommands to isolate the output to a certain subcomponent and minimize the load on the processor. Use appropriate arguments and keywords to generate more detailed debug information on specified subcomponents. Enter the specific no debug condition glbpor no debug glbp command when you are finished.
IPv6 Configuration Guide, Cisco IOS Release 12.4T - Configuring First Hop Redundancy Protocols in IPv6 [Cisco IOS Software Releases 12.4 T] - Cisco