Quote Originally Posted by firas81 View Post
Hi,

it works, but i think this is not a perfect solution to do it, but why do you have three entry in your map??? and why do you use it from ospf into eigrp????

the idea here to block the exteranl eigrp prefixes in ospf domain, because the transition from higher AD to lower AD makes the routers border ospf R9/10 choose it, and then we get the loop.


I think the solution by using your map with a littel bitte updating will be on R9/10 as the next:

route-map DENY-TAG deny 10
match tag 172.172.172.172
route-map DENY-TAG permit 20

router ospf 1
distribute-list route-map DENY-TAG in

Only this, it is simple and perfect.

and with using the Ad in H2+ will be:

router os 1
distance ospf external 175 ------> a little bit higher than external eigrp 170

All the best.
Hi Thank you for your explanation. Your Solution works fine for me too! Many thanks for share