Date: Fri, 11 Sep 2020 13:02:50 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 249253] missing nd6 Neighbor Advertisement on carp failover Message-ID: <bug-249253-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D249253 Bug ID: 249253 Summary: missing nd6 Neighbor Advertisement on carp failover Product: Base System Version: 12.1-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: claus.riegg@makandra.de We're experiencing delay on CARP failovers with IPv6 in multiple setups at = the moment.=20 Transition from BACKUP to master works fine and Gratuitous ARP is sent for = all IPv4 addresses immediately. The unsolicited Neighbor Advertisement for IPv6 seems to be missing (at least we don't see it when capturing traffic with TCP-dump).=20 Future Neighbor Solicitations will be answered by the current CARP MASTER correctly but until then traffic is still arriving at the BACKUP (former MASTER).=20 Google returned this blogpost: https://www.stoklasa.one/carp-with-ipv6-protocol/ Josef Stoklasa seems to think that this is normal behaviour but looking at carp_master_down_locked function here looks like that there should be an unsolicited Neighbor Advertisement: https://github.com/freebsd/freebsd/blob/03c216ce761c84dbe6ab7611453931211e9= 23986/sys/netinet/ip_carp.c#L1280 --=20 You are receiving this mail because: You are the assignee for the bug.=
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