On Tue, Mar 19, 2024 at 08:50:22AM +0400, Dmitry Melekhov wrote: > Hello! > > Just upgraded and got: > ... > Downgrade to 2.14 solved problem. > > Is there fix for this or workaround?
Hello There are two issues, both caused by commit 31aa62ae6d2e111e87c08b4b27a16ead968f0689: 1) BIRD could generate ECMP routes with multiple dev-only nexthops, which Linux kernel accepts only in IPv4 but not in IPv6 case. 2) The commit breaks the way how next hops are inherited during next hop calculations. Both issues are restricted to physical PtP links (including L3 tunnels like GRE). The first issue is limited to ECMP IPv6 and can be workarounded by disabling ECMP, the second one has wider impact. Soha Jin sent patches for both of this issues [*], but i am leaning towards making a quick bugfix release that reverts the original commit, so we can take more time to evaluate the change. [*] Patches: https://bird.network.cz/pipermail/bird-users/2024-March/017475.html https://bird.network.cz/pipermail/bird-users/2024-March/017504.html -- Elen sila lumenn' omentielvo Ondrej 'Santiago' Zajicek (email: santi...@crfreenet.org) "To err is human -- to blame it on a computer is even more so."
