On Mon, Aug 19, 2019 at 12:11:20AM +0200, Martin Bosner wrote:
Hello Mike,
thank you for your reply. I also thought about that but since other routers (e.g. router E) can exchange routes with router A (routed over other BGPs) i don't think that we need static routes or OSPF. Or is that assumption wrong?
Routes received from multihop BGP must have BGP next hops resolvable through non-recursive routes (e.g. static, OSPF or even direct BGP). So perhaps you have appropriate direct BGP route on E, F, but not on G, H? If you see this on G, H:
223.230.128.0/22 unreachable [routerG_to_routerA 03:15:02.410 from 153.92.124.4] * (100/-) [AS45609?] ... BGP.next_hop: 153.92.124.4
And this on E, F:
223.230.128.0/22 unicast [routerE_to_routerA 02:42:58.878 from 153.92.124.4] * (100/?) [AS45609?] via 192.168.0.1 on external ... BGP.next_hop: 153.92.124.4
You should check 'show route for 153.92.124.4' on these machines to see the route for BGP next hop. -- Elen sila lumenn' omentielvo Ondrej 'Santiago' Zajicek (email: santiago@crfreenet.org) OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net) "To err is human -- to blame it on a computer is even more so."