Matthieu Herrb(matth...@openbsd.org) on 2019.09.04 18:07:35 +0200: > Hi, > > I've a pair of redundant routers, which need to run rad(8) on the > internal interfaces. > > But using carp, on the inactive router, rad complains every > time it tries to send a RA: > > rad[65590]: sendmsg on carp2: Can't assign requested address > > Which I can understand since it currently doesnt "own" the shared IPv6 > address of the carp interface.
correct. rad(8) needs to look at the interface state to not try sending on a (carp) interface that is in backup state, or just not print this warning at all. It is possible to monitor the link state since the frontend process already has a route socket and could certainly track the link state, buts its a little bit of work. > Is there a way to configure rad to avoid these errors? At the moment none other than patching out the log_warn(). > How do other people handle the situation? > > Thanks in advance, > -- > Matthieu Herrb > Unrelated, but noticed by florian, this bit in the manpage is no longer needed since he removed soii for link-local adresses in sys/netinet6/in6_ifattach.c rev 1.114 ok? diff b31eb29f59f3580445ea0341b271e321d53958a6 /opt/git/benoit/src blob - d93e64d4648dfe25a5c76faac3994780d1ce02f8 file + usr.sbin/rad/rad.8 --- usr.sbin/rad/rad.8 +++ usr.sbin/rad/rad.8 @@ -146,15 +146,3 @@ The .Nm program was written by .An Florian Obser Aq Mt flor...@openbsd.org . -.Sh CAVEATS -When running -.Nm -on a -.Xr carp 4 -interface, it is recommended to either disable SOIIs (persistent Semantically -Opaque Interface Identifiers) on the interface with -.Xr ifconfig 8 , -or ensure that all CARP peers have the same SOII key stored in -.Pa /etc/soii.key . -Otherwise the default IPv6 router's link-local address will change during CARP -failover, which temporarily disrupts connectivity of IPv6 autoconf clients.
