BIRD 2.15

[Soha Jin]

Hello Ilham,

You can disable ECMP with `ecmp off;` in the protocol `ospfv3v6` as a workaround (if you don’t need ECMP).

Since 31aa62ae6d2e111e87c08b4b27a16ead968f0689, OSPFv3 will use direct route for pointopoint interfaces. Unfortunately, kernel doesn’t support multipath with a device only route, so there is a ! on the route.

BIRD v2.15 ready.
bird> show route
Table master4:
192.88.99.0/24       unicast [ospf2 14:55:01.553] * I (150/20) [1.9.1.9]
        dev wg-main
        dev wg-main2

Table master6:
2001:db8:272::/48    unicast [ospf1 14:55:01.553] ! I (150/20) [1.9.1.9]
        dev wg-main
        dev wg-main2

I am drafting a patch to fix it.

Regards,
Soha

----------------------------------------------
From: Bird-users <bird-users-bounces at network.cz> On Behalf Of Ilham Maulana
Sent: Monday, March 11, 2024 12:27 PM
To: Ondrej Filip <feela at network.cz>; Ondrej Zajicek via Bird-users <bird-users at network.cz>
Subject: Re: BIRD 2.15

Hello,

After upgrading to 2.15, OSPFv3 is broken. Previously working on 2.14. No configuration changes.

This capture taken from router with Bird 2.15 installed.

--------------------------------
OSPF route from router with Bird 2.15. it has ! sign.

birdc show route all 2a05:abcd:abcd:abcd::/128 
BIRD 2.15 ready.
Table master6:
2a05:abcd:abcd:abcd::/128 unicast [ospfv3v6 2024-03-11 10:05:40] ! I (150/10) [1.1.1.1]
        dev wg6
        dev wg7
        Type: OSPF univ
        OSPF.metric1: 10
        OSPF.router_id: 1.1.1.1


-----------------------------------------------------
OSPF route from router with Bird 2.14, working as expected, with * sign.

birdc show route all 2a05:abcd:abcd:abcd::3/128 
BIRD 2.15 ready.
Table master6:
2a05:abcd:abcd:abcd::3/128 unicast [ospfv3v6 2024-03-11 08:23:55] * I (150/10) [192.168.99.141]
        dev wg2
        Type: OSPF univ
        OSPF.metric1: 10
        OSPF.router_id: 192.168.99.141

Any idea, what's going on?