From: Frank Liang (liangfrank@xxxxxxxxxxx)
Date: Fri Feb 02 2001 - 14:40:00 GMT-3
Kay,
Most of the data centre modems like Motorola 3266 support leased line as
well as dial backup. You can configure it to dial multiple destinations. If
the first destination fail to establish the connection, it will try the
second one then third one and so on.
In the Cisco router, let say s0 is leased line, dialer1 is DDR backup. You
can use backup int di1 under int s0 and set up two dialer strings for site B
and site C under int di1.
will this achieve what you are trying to do?
Frank
>From: "Kay Olateru" <kolateru@cisco.com>
>Reply-To: "Kay Olateru" <kolateru@cisco.com>
>To: <ccielab@groupstudy.com>
>Subject: Dial Backup
>Date: Fri, 2 Feb 2001 13:47:36 -0000
>
>All,
>
>Apologies if this does not fall within the CCIE Lab exam, however, I would
>like to confirm whether the solution I am thinking is right.
>
>Problem:
>I want to backup a leased line failure between site A and B(failure meaning
>all routes to B have been lost), to first dial site B and if this fails
>then
>dial a second site C on a different subnet. How can you dial the second
>site
>automatically after the first dial backup has failed.
>
>Solution???
>Use the normal dial backup with DDR to back up the leased line, and then
>use
>floating static route (with higher administrative distance of course!) with
>DDR to dial Site C. I presume that this will only work if there is no route
>entries on A for site B, but the only viable route will be via C - the
>floating static route.
>
>Has anybody tried this before or have I missed something completely basic??
>
>
>Regards
>
>
>Kay. S. Olateru (Mr)
>Systems Engineer, CCDP
>Network Service Providers - Western Europe
>ISP1
>Cisco Systems, EMEA
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