https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=234472
Andreas Pflug <pgad...@pse-consulting.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|Affects Only Me |Affects Some People
--- Comment #4 from Andreas Pflug <pgad...@pse-consulting.de> ---
After debugging a while, I found out that outgoing CARP packets are sent to the
expected MAC address 01:00:5e:00:00:12 with pf disabled, on some interfaces
(those with gateways) instead of coding the lower 23bits of 224.0.0.18 into the
address some gateway on that local network is used. This is not conforming to
RFC1112 6.4, and apparently some IGMP aware switches will filter those
malformed packets.
In some case, flipping some IGMP instructions on switches affected may fix CARP
functionality, but the basic problem is in the freebsd kernel.
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