On 30.04.2019 15:56, Ondrej Zajicek wrote:
On Tue, Apr 30, 2019 at 03:34:59PM +0200, Matěj Grégr wrote:
Hello, we have encountered a different ibgp behavior between bird 1.6 and bird2, and I am not sure if it's an intentional change in bird2 or a bug. Let's consider the following topology:
192.168.1.0/24 192.168.2.0/24 R1 ------- ebgp ------- R2 ------- ibgp ------- R3 .2 .1 .1 .2
R1 uses AS 65001, R2 and R3 uses AS 65000. R1 propagates some routes (e.g. 10.10.10.0/24) via eBGP to R2, which sends them to R3 via iBGP. bird2 config on R3:
template bgp IBGP { local as 65000; direct; ipv4 { next hop self; import keep filtered on; import all; }; }
protocol bgp from IBGP { neighbor 192.168.2.1 as 65000; }
What bird is config on R2?
I don't think there are any intentional changes w.r.t. your config.
R2 is not running bird, but it's a cisco router, but we encounter the same behavior with other vendors as well (HP). The config is pretty simple on R2: router bgp 65000 bgp log-neighbor-changes network 192.168.1.0 network 192.168.2.0 neighbor 192.168.1.1 remote-as 65001 neighbor 192.168.2.2 remote-as 65000 The routes are correctly sent from R2 to R3 (checked it with tcpdump and routes are included in BGP updates) M.