From: Jay Greenberg (groupstudylist@execulink.com)
Date: Fri Dec 06 2002 - 14:06:40 GMT-3
I suppose you could make it a backup demand-circuit by ensuring that the
cost of the ISDN link is greater than that of the serial link. This may
already be the case if default bandwidths are used on the link.
On Fri, 2002-12-06 at 07:17, csc david wrote:
> 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!
>
>
>
> ---------------------------------
> Do You Yahoo!?
> "JGIT>+S"Bp#?P!JTE#56;qJ1IP4s=1#!"
> .
.
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