Redistribute Command

[kingster]

All,

I am wanting to redistribute routes learnt from RIP into an
OSPF area and vice versa.
Is there anything I need to lookout for as I think there maybe complications in doing this.

(TECH Question: How does the router stop itself from keep passing the routes from RIP to OSPF and back in a chicken and the egg scenario)

Cheers

 

[mavenccie]

An excellent question and very useful skill. There are two typical methods, 1) distribute-list out and 2)route-maps. What you need to do is filter routes that the particular protocol might already know from itself. I prefer distribute-list out. Follow the following example. And read up on routing protocol independent features on Cisco's site or on the Documentation CD for more info.

router rip
network 10.0.0.0
redistribute ospf 1
!
router ospf 1
network 10.1.1.0 0.0.0.255 area 0
network 192.168.1.0 0.0.0.255 area 0
redistribute rip
distribute-list 1 out rip
!
access-list 1 deny 10.1.1.0 0.0.0.255
access-list 1 deny 192.168.1.0 0.0.0.255
access-list 1 permit any