route server appears to be selecting preferred routes and not all routes

[alarig at swordarmor.fr]

Hi Stephen,

21 août 2018 00:17 "Stephen Fromm" <stephenf at nero.net> a écrit:
> We are running bird as a route server to support a small IX. The
> challenge we are having is that it appears that bird is selecting a
> preferred route from what is advertised to the route servers and then
> advertising back out only the preferred route to all members, instead of
> advertising all routes received for a given network. Included below are
> relevant configuration snippets, logs, and some show commands.
> 
> How do I configure bird to keep the routes learned from all peers and
> advertise those back out to the members and not select a preferred
> route?

It’s a normal behaviour, only the preferred route is announced to other peers.

We have the same here:
bird> show route 192.175.48.0/24
192.175.48.0/24    via 185.1.89.16 on eth2 [bgp_as112 2018-08-18] * (100) [AS112i]
                   via 185.1.89.12 on eth2 [bgp_quantic 2018-08-18] (100) [AS112i]
                   via 185.1.89.13 on eth2 [bgp_grifon_budic 2018-08-18] (100) [AS112i]
bird> show route export bgp_izzycom where net ~ [ 192.175.48.0/24 ]
192.175.48.0/24    via 185.1.89.16 on eth2 [bgp_as112 2018-08-18] * (100) [AS112i]

I just displayed one route in my example, but it’s the same for the others.

-- 
Alarig