Backup interface

From: GAURAV MADAN (gauravmadan1177@gmail.com)
Date: Fri Jul 25 2008 - 03:16:05 ART


Hi All

I have following setup :

                      FR------s0/0/0.401 R4 ------- s0/0/1

In the event of failure of link to FR cloud ; i want s0/0/1 on R4 to come up .
I give :

Rack1R4(config-subif)#do sh run int s0/0/0.401
Building configuration...

Current configuration : 222 bytes
!
interface Serial0/0/0.401 point-to-point
 backup delay 0 60 <====
 backup interface Serial0/0/1 <====
 ip address 148.1.0.4 255.255.255.0
 no ip split-horizon
 snmp trap link-status
 frame-relay interface-dlci 401
end

My issue is :

1) To test the backup config ; I gave " no frame-rel dlci " under
s0/0/0.401 . As expected my backup interface came up .
*Jul 25 06:12:36.463: BACKUP(Serial0/0/0.401): event = primary
interface went down
*Jul 25 06:12:36.463: BACKUP(Serial0/0/0.401): changed state to
"waiting to backup"
*Jul 25 06:12:36.467: BACKUP(Serial0/0/0.401): event = timer expired on primary
*Jul 25 06:12:36.467: BACKUP(Serial0/0/0.401): secondary interface
(Serial0/0/1) made active
*Jul 25 06:12:36.467: BACKUP(Serial0/0/0.401): changed state to "backup mode"

2) But If I shutdown the s0/0/0.401 interface ; I expect the backup
interface to come up . But it does not .
    Is there something I am missing . I get s0/0/1 to go to "standby /
disabled " state .

Please guide

Thnx
Gaurav Madan.



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