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New Member

BGP redistribution into OSPF

I am testing the idea of running BGP from 3rd partner extranet connections in an enterprise which will redistribute into an OSPF core. In my simplistic testing, I have an access router and a distribution router configured as a BGP confederation and the distribution router also shares an OSPF process and area 0 with the core router (a seperate BGP confederation). I have an external extranet partner in a seperate AS running an eBGP peering session with the access router which is injecting routes that appear all the way back in the core.

My problem is in how I implement redistribution into the IGP (OSPF) on the core router. Doing so creates a routing loop by re-advertising an OSPF E1 route (AD 110) for the extranet router source ranges back to the distribution router. As a result the distribution router thinks the best path is back through the core router as apposed to the iBGP learned route (AD 200). I'm a bit unsure as to the best method of addressing this. Any help would be appreciated. Thanks in advance.

2 REPLIES
Bronze

Re: BGP redistribution into OSPF

just fire in the default route mate if you can into your ospf process at the bgp external point.

New Member

Re: BGP redistribution into OSPF

Thanks for the help. Much appreciated. Always the simplest of solutions !

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