From: Sumit (sumit.kumar@comcast.net)
Date: Fri Apr 01 2005 - 23:10:01 GMT-3
Your requirement is not very clear but If you need to backup link between
R1 and R3 and use ISDN only when link between R2 and R3 is down I think you
can use Dialer watch to watch loopback interface of R2.
If I misunderstood provide some more details
Sumit
----- Original Message -----
From: "ccie zeng" <ccie.candidate@gmail.com>
To: "Cisco certification" <ccielab@groupstudy.com>
Sent: Friday, April 01, 2005 7:17 PM
Subject: ISDN Backup
> Hi:
> I have following scenario:
>
> R1----------ISDN-------------R3
> ----------R2---------------
>
> I have primary connection R1, R2, and R3. I would like backup the
> connection using isdn between R1 and R3. all of them running OSPF, the
> call can NOT be triggered if the link between R1 and R2 is down.
>
> Could anyone tell me how to do it?
>
> Thanks
>
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