Hey Tore, we are running active-active routers with bird, wihout VRRP as follows: - router1: high priority - router2: low priority Sample config: protocol radv { # Internal interface "eth1.10" { max ra interval 5; # Fast failover with more routers other config yes; # dhcpv6 boot default preference high; default lifetime 600; }; # Server interface "eth1.11" { max ra interval 5; default preference high; default lifetime 600; }; } Routing via EUI-64 based link local addresses. This works fine with Linux servers, however Windows/Linux clients do not necessarily seem to accept the higher/lower preference route. Cheers, Nico Tore Anderson <tore@fud.no> writes:

I am trying to use BIRD v2.0.8 to emit ICMPv6 RAs from a HA pair of routers.

The default router address of the router (fe80::1) is failed over using the VRRP protocol, so it is only present on a single router at any given time.

I have run into two challenges I cannot quite figure out how to solve:

1) How to make BIRD only emit RAs if the router is active, i.e., only on interfaces where the fe80::1 address is configured.

(It appears that RAdv does not support the «interface "*" fe80::1/128 {};» syntax; it just complains «Interface name/mask expected, not IP prefix»).

2) How to make BIRD use the fe80::1 default router address as the source address of the emitted RAs instead of the EUI-64-generated link-local address (which will not fail over to the standby router in the event of a failure, and should therefore not be used as a router by the hosts receiving the RAs).

I am grateful for any suggestions.

Tore

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