Hi Guys,
According the the solution guide, we are disabling the frame relay main interface on R4 to trigger the backup interface to come up.
However when I try to disbale the frame relay subinterface, the backup point to point interface didn't come up instead it went to disabled mode? any idea?
before shut down the interface
Rack1R4#sh ip int brief
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 204.12.1.4 YES manual up up
Serial0/0 unassigned YES unset up up
Serial0/0.1 155.1.0.4 YES manual up up
FastEthernet0/1 155.1.146.4 YES manual up up
Serial0/1 155.1.45.4 YES manual standby mode down
Loopback0 150.1.4.4 YES manual up up
After shut down the interface
Rack1R4#debug backup
Backup events debugging is on
Rack1R4#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Rack1R4(config)#int se0/0.1
Rack1R4(config-subif)#shut
Rack1R4(config-subif)#
*Mar 5 00:31:36.584: BACKUP(Serial0/0.1): event = primary interface shutdown
*Mar 5 00:31:36.588: BACKUP(Serial0/0.1): secondary interface (Serial0/1) moved to standby
*Mar 5 00:31:36.592: BACKUP(Serial0/0.1): changed state to "disabled"
*Mar 5 00:31:37.576: BACKUP(Serial0/0.1): event = primary interface went down
*Mar 5 00:31:37.576: BACKUP(Serial0/0.1): backup is currently disabled on this interface
Rack1R4(config-subif)#end
Rack1R4#sh
*Mar 5 00:31:42.996: %SYS-5-CONFIG_I: Configured from console by console
Rack1R4#sh ip int brief
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 204.12.1.4 YES manual up up
Serial0/0 unassigned YES unset up up
Serial0/0.1 155.1.0.4 YES manual administratively down down
FastEthernet0/1 155.1.146.4 YES manual up up
Serial0/1 155.1.45.4 YES manual standby mode/disabled down
Loopback0 150.1.4.4 YES manual up up
Rack1R4#sh backup
Primary Interface Secondary Interface Status
----------------- ------------------- ------
Serial0/0.1 Serial0/1 disabled