Hello Guys,
I am in a little trouble here, 2 questions ! please give away your comments:
scenario:
In a multisite network enviornment, SITE-A is having multi-service providers and making GRE tunnels with Site-B & Site-C.
Site-A is running backbone Area 0, while all boundry routers are acting as ABR for Area-4 & Area-3 via GRE Tunnels
Problem:
Route-Site-A-2 is the lowest cost to reach Site-B , On Core router at Site-A you'll see Router-Site-A-2 and Site-B as a selected path....but when you go to any ABR... you'll see its own Tunnel as the best exit path via OSPF, although other ABR's are recieving shortest path via OSPF neighbours.
In OSPF RFC i read:
> the order of preference for OSPF routes is:
> intra-area routes, O
> interarea routes, O IA
> external routes type 1, O E1
> external routes type 2, O E2
so how do this issue justifies with another opinion by a cisco's expert that
"As being in a different area, OSPF will opt for the nearest exit - It pays no attention to the metric on the link...."
Another question is: Area-3 doesn't wantes to recieve routes from Area-4 and vice versa but connection to Area 0, is distributing the routes/flooding to both these areas.
I have tried making both Area 3 & 4 a stub but it's not helping...next thing i tried was to drop the routes coming active by filter-lists in OSPF but obviously it's not stopping the OSPF database packets...what can be the possible solution..
thanks in advance...
Shakeel
