where is my network with multihop bgp

Arjan Filius iafilius at xs4all.nl
Thu Mar 24 14:06:14 CET 2011


I've 2 bird bgp routers internally connected with 2 links.
To make benefit of both links, i should have been using iBGP configured
on a "stub" or loopback address, but there was an issue with
So i choose  to use 2 iBGP sessions, using both links, to ensure

The reason for choosing the vrrp address seems to be logical as it is on
IP in our "owned" range and not any of a transit.
I'd not see a regular way to setup such readonly monitor link.

i'll send you the configs of the 2 iBGP routers, and my monitor bird
config .

Thanks in advance


Arjan Filius

On Thu, 2011-03-24 at 12:20 +0100, Ondrej Zajicek wrote:

> On Wed, Mar 23, 2011 at 03:32:11PM +0100, Arjan Filius wrote:
> > Hello Bird users,
> >
> > I tried to configure the/my first multihop bgp configuration for
> > monitoring purposes, but i don't get the correct network exported.
> >
> > Our setup:
> > 2 Bird bgp routers, connected with iBGP, and bot have there own transit's.
> > the published /20 network work just fine for about one year now (no
> > multihop).
> >
> > Now i'm setting up a multihop bgp with source an redundant internal VRRP  
> > address which belongs to that  published /20 to another bird i've 
> > controll of,
> > on both bgp routers. (so actually only the one which has the vrrp address 
> > is working/active)
> Why such strange setting?
> BTW, for iBGP, the proper configuration is to have one BGP session with each
> of these two routers.
> To find the problem, i would need your config files (for all three
> routers).

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