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

[Kamal Dissanayaka]

Thanks Jon,

I my understanding is the same. It shouldnt work without next-hop-self.

But it works,

The directly connected network is advertised through BGP on router B using
redistribute connected.

Kamal


On Mon, Aug 1, 2016 at 1:44 PM, Jon Simola <jsimola at gmail.com> wrote:

> 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
> routes
> > 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) 172.18.112.41---- 172.18.112.40 Router B (65001)
> > 172.18.112.37 --- 172.18.112.38 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.
>
> Regards,
>
> --
> Jon
>