Hello,
I am running BIRD 1.4.2 on two Ubuntu Linux 12.04 systems acting as border
routers. Two eBGP peers on each with iBGP between them. OSPF also between
them and internally.
I notice that on reboot 10-15 packets both in and out are lost. This seems
to happen just as/after the bird process starts. It appears as if perhaps
BGP is establishing prior to the OSPF neighbors coming up and as a result
black-holing traffic. I am nailing down my public IP prefixes with null
routes.
I have attempted to use the 'start delay time x' command under the BGP
sessions however they still establish immediately. I believe this is
because this command delays the outbound attempt to connect yet the remote
side is initiating it.
# eBGP session to X
protocol bgp eBGP_X {
description "eBGP - X";
local as X;
neighbor x.x.x.x as x;
* start delay time 60;*
import filter import_eBGP_X;
export filter export_eBGP_X;
}
Has anyone else ran into this problem with a similar design? Is there a
different command to prevent BGP peering from establishing or to wait for
the IGP?
I have implemented a workaround/hack by filtering incoming TCP connections
with destination port 179. This prevents the peers from being established
until the *start delay time* is reached. I will review my routing
configuration/design however is there another way to accomplish this?
Thanks!
Tom.
