[c-nsp] BGP next hops in BGP not in IGP

Jon Simola jsimola at gmail.com
Sun Jul 31 23:44:01 EDT 2016

On Jul 31, 2016 17:37, "Kamal Dissanayaka" <kamalasiri at gmail.com> wrote:
> HI All,
> As my knowledge, BGP next hop needs to be in IGP in order to get BGP
> in routing table.
> It looks like, it may have changed ?  BGP routes populate in routing table
> when the next-hp route is learned through BGP.
> I tried some googling but I cannot get definite answer.
> here is the scenrio
> Router A (18162) Router B (65001)
> --- Router C (65001)

My understanding is that your transit network between A and B should not
appear in your IGP, and B should be setting next-hop-self when advertising
towards C. Logically, B is the exit point from your AS, so everybody just
needs to know how to get the traffic to it.



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