Redundant Link

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Apr 12th, 2007
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I have a router with 2 links from different ISP. I need to configure redundant link. When the first link down, the second link up. What protocol i use? Both links are in a router only.


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pgcristovam Thu, 04/12/2007 - 12:23
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The "backup interface" it's not only for dial backup?

The 2 links will be both MPLS or 1 MPLS and other Frame Relay, and the customer wants to leave a link stopped, to backup only.

spremkumar Thu, 04/12/2007 - 20:12
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did you try configuring the routes accordingly so that the secondary link wont forward any traffic until unless your primary link goes down.

You can define floating static routes to achieve the same.

One route without any administrative distance which will act as a primary route pointing via the primary link and the second route with some administrative distance pointing via secondary link.

By doing so you can achieve the required redundancy feature on your links..


Amit Singh Fri, 04/13/2007 - 01:32
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Agree with Edwin on this, foating static route will help you in this case. Do the following:

conf t

ip route

ip route 100


-amit singh


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