Hi, I'm trying to solve an issue of "unreachable" prefix The scenario is as followin: BIRD 1.4.0 (RtrB) has iBGP peer with (RtrC) that has route reflector originating prefix 10.0.2.0/24 RtrB ip is 10.1.1.1 RtrC ip is 10.1.1.2 on RtrC "sh ip bgp 10.0.2.0/24" provides that the next_hop is 10.4.4.4 on RtrB "show route 11.0.2.0/24 table master all" provides BGP.next_hop: 10.4.4.4 adding "gateway direct;" provides "Multihop BGP cannot use direct gateway mode" I'm little bit confused , isn't it a whole purpose of "gateway direct;" to provide legacy functionality to iBGP peers? I've tried changing next hop via import filter " bgp_next_hop = 10.4.4.4;" Next hop of prefix in RtrB changed , however the prefix itself stayed "unreachable" The only thing helped configuring static protocol record for 10.4.4.4, but this is not an option for production environment due to dynamic nature of prefixes and multiple next hops Please advise
On Tue, Mar 11, 2014 at 02:56:09PM +0200, MrBr @ GMail wrote:
Hi, I'm trying to solve an issue of "unreachable" prefix
The scenario is as followin: BIRD 1.4.0 (RtrB) has iBGP peer with (RtrC) that has route reflector originating prefix 10.0.2.0/24 RtrB ip is 10.1.1.1 RtrC ip is 10.1.1.2 on RtrC "sh ip bgp 10.0.2.0/24" provides that the next_hop is 10.4.4.4 on RtrB "show route 11.0.2.0/24 table master all" provides BGP.next_hop: 10.4.4.4
adding "gateway direct;" provides "Multihop BGP cannot use direct gateway mode" I'm little bit confused , isn't it a whole purpose of "gateway direct;" to provide legacy functionality to iBGP peers?
Hello You should use "direct" option to switch from multihop to singlehop. It is possible to use "gateway recursive" to switch gateway behavior for singlehop sessions (default 'gateway direct'), but not in the other way. -- 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."
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Ondrej Zajicek