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ISIS and OSPF together

Sent from my iPhone

On May 12, 2013, at 1:41 AM, Glen Kent <glen.kent at gmail.com> wrote:

> The other instance would be when say OSPF is used to manage the OOB network
> and the ISIS is used for network reachability.
> Is there any other scenario?

Yes,  in virtualization world , where people no more want to waste their links that form loops, there are scenarios where you may have a TRILL deployment that runs over IS-IS while you have OSPF running side by side.