Routes received by BGP and OSPF

Routes received by BGP and OSPF

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Subject Author Date
Routes received by BGP and OSPF German R 02-05-2007
Posted by German R on February 5, 2007, 11:48 am
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Hello,

We have a router A with several links to other routers. The router A
have two links to the same remote router B, and it is using OSPF
through one of the links and BGP through the other link. It is
receiving the same route from router B via OSPF and BGP
simultaneously.

Is there any way to force the following: use the BGP route in router A
to route packets, but use the OSPF route to advertise from router A to
other routers via OSPF?

I appreciate any help. Thanks.


NMFall 20%
Posted by Thrill5 on February 5, 2007, 8:30 pm
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You should never, ever, ever run two different routing protocols between two
routers. This will cause very strange and unexpected behavior. You can
corrupt the metrics sent by the protocols for routes known by both protocols
even if you are not redistributing traffic. If you need the routes on
router B learned from BGP on router A, redistribute the routes into OSPF by
router A. If both routers really need BGP and OSPF, make one of the
protocols passive on the links that they share.

Scott
> Hello,
>
> We have a router A with several links to other routers. The router A
> have two links to the same remote router B, and it is using OSPF
> through one of the links and BGP through the other link. It is
> receiving the same route from router B via OSPF and BGP
> simultaneously.
>
> Is there any way to force the following: use the BGP route in router A
> to route packets, but use the OSPF route to advertise from router A to
> other routers via OSPF?
>
> I appreciate any help. Thanks.
>



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The Federal Communications Commission (FCC)
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