Friday, March 13, 2020

Permit tagged redistributed routes to one BGP path while denying the same routes to another path

Got another one for you guys that's stumping me. We are in the process of migrating MPLS by flipping remote sites one by one. We have two Data Centers that all remote sites will still need paths to regardless of the MPLS they are on.

Here is the issue the two data centers exchange each others routes via EIGRP, so in order to not have them exchange each other's routes over BGP we have tagged them to be denied when being redistributed to the BGP.

The problem with that is as the remote sites migrate over they have to use 1 data center as a "transit" to the other and since the redistribution command is global and not per neighbor the remote sites can see all but the tagged eigrp routes.

Any idea how I can get around this will still protecting the data centers from loops?

Draw up a quick image to kind of show what I'm dealing with

https://imgur.com/N1QqxDa



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