Thanks for your answer.

The switches weren't properly configured.

I managed to get multipath working. At least with ipv4.

When enabling "add paths" on ipv6 channel, I get an "Received: Invalid OPEN message" error (although the switch is advertising the capability). I wont blame bird yet, as ExaBGP peers dont care at all.

to be continued ...

Arnaud Houdelette-Langlois
Administrateur des infrastructures systèmes et réseaux
Normandie Université
+33 2 31 56 69 54

Le 04/03/2023 à 00:29, Hugo Slabbert a écrit :
What's your `show protocols all` output for the BIRD side for the sessions with the switches, to confirm BIRD is advertising add-path TX and the switches advertising add-path RX? Do you see ADD-PATH capabilities showing up properly both on the local and neighbor capabilities (TX for local capabilities; RX neighbor capabilities (switches)?)

On Fri, Mar 3, 2023 at 7:49 AM Marek Zarychta <zarych...@plan-b.pwste.edu.pl> wrote:

    W dniu 3.03.2023 o 16:27, Arnaud Houdelette-Langlois pisze:
    > That's was an expected one, but as I send routes to another
    router and
    > not to the kernel i would have expected that this would not have
    been
    > an issue. I will try to update bird.
    I might be wrong and misleading you then. Perhaps someone from BIRD
    developers can shed more light on this, but if you can give try
    building
    2.0.12 with netlink support.
    > Do you know if BSD port is up to date ?

    No, it's still 2.0.11 in ports, but you can use the patch from
    bugzilla[1]. You'll need the most recent 13-STABLE or 14-CURRENT
    built
    or 13.2-RC1 to build and run netlink flavor or the port.

    [1] https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=269553

-- Marek Zarychta

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