convert eigrp into ospf

[engrashfaqahmed]

                   how we convert eigrp into ospf without route redistribution.

[brett.harding]

Hi Ashfaq,

This may not be a simple task if you have a very large network. If you have a large network, it would make sense to do this is a phased approach where you select a handful of sites, configure them for OSPF and have them redistriute into EIGRP and then progressively remove EIGRP routing from the network. You could also turn on both routing protocols simultenously, however you may need to consider changing the EIGRP admin distance to be higher than OSPF (110).

Cheers

Brett

[engrashfaqahmed]

yup i have a large network...can u plz elaborate

[paul driver]

Hello

Do you mean protocol migration?

The actual process is quite simple but I think the planning of a large ospf domain would be the problem.

You will need to have good documentation/ baselines etc and highlighting any possible issues with unknown links etc and have a good change management procedures and backout plan.

The actual process migration from eigrp to ospf involves manipulation the new routing protocol( in this case ospf) admin distances so you have the old and the new igps running along side each other ( SIN routing)

Please check out this link - it explains the steps for such a process.

http://stack.nil.com/ipcorner/ChangingRoutingProtocol/

res

Paul

Please don't forget to rate any posts that have been helpful.

Thanks.

[brett.harding]

Hi Ashfaq,

The link provided by Paul in the above post provides a very good explanation for migrating from EIGRP to OSPF. If you have read that and still have more specific question please let us know.

Rgds

Brett

[engrashfaqahmed]

thanks