Having a question for you all. We are redistributing between some external BGP routing to our internal EIGRP routing processes on two border routers that connect to this external network. These two routers are in different locations.
The problem is this. We want to summarize the EIGRP routes as they go out to the BGP network and by using the "aggregate-address" with the "summary-only" option that part is working fine. However, as an unintended consequence, these routes are then included in the redistribution back into EIGRP. I would rather this not happen.
I was thinking we could set up a route map on the "aggregate-address" command using the "advertise-map" option that set a tag on the route, which we would then look for in EIGRP and not let back into the routing tables. However, when I try this I get the error message:
"ROUTE-MAP" used as BGP advertise route-map, set tag not supported
Is there a better way of doing this that I'm not seeing? Any suggestions would be appreciated.
Re: EIGRP to BGP redistribution/summarization problem
Yes, that is a thought, however, it does mean maintaining both the aggregation and the route-map. While this definitely would work, it just doesn't seem like the most efficient way, plus its prone to mistakes if someone updates one without the other.
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