From: csc david (davidcsc2002@yahoo.com.cn)
Date: Fri Dec 06 2002 - 09:17:31 GMT-3
Hello, everybody, I have some ospf demand-circuit questions.
r1 communicates with r2, all in ospf network, they communicate with each other through frame-relay, and isdn is a backup.
Q1: if I cannot use backup interface or dialer watch-group, only use ip ospf demand-circuit, can it work in backup mode?
Q2: when frame-relay is working, and I make the isdn working too(10.105.2.17), so I get :
WH2650XM#sh ip ospf n
Neighbor ID Pri State Dead Time Address Interface
10.121.2.5 1 FULL/ - 00:00:39 10.105.2.5 Serial0/1 (frame-relay)
10.122.2.9 1 FULL/ - 00:00:38 10.105.2.9 Serial0/0 (frame-relay)
192.168.1.20 1 FULL/ - - 10.105.2.17 BRI0/0
10.105.38.5 1 2WAY/DROTHER 00:00:36 10.105.1.4 FastEthernet0/0
but after sometime, it appears:
00:20:45: %OSPF-5-ADJCHG: Process 100, Nbr 192.168.1.20 on BRI0/0 from FULL to D
OWN, Neighbor Down: Too many retransmissions
Neighbor ID Pri State Dead Time Address Interface
10.121.2.5 1 FULL/ - 00:00:39 10.105.2.5 Serial0/1
10.122.2.9 1 FULL/ - 00:00:37 10.105.2.9 Serial0/0
10.105.38.5 1 2WAY/DROTHER 00:00:38 10.105.1.4 FastEthernet0/0
why?
Thanks!
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