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ISIS and OSPF together

On Sun, May 12, 2013 at 6:41 PM, Glen Kent <glen.kent at gmail.com> wrote:
> I would like to understand the scenarios wherein the service
> provider/network admin might run both ISIS and OSPF together inside their
> network. Is this something that really happens out there?
> One scenario that i can think of when somebody might run the 2 protocols
> ISIS and OSPF together for a brief period is when the admin is migrating
> from one IGP to the other.
> 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?

There is still equipment around which doesn't support ISIS but support OSPF.
Getting such boxes into a network which is using ISIS might lead to
running both protocols together.

SY, Jen Linkova aka Furry