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/>
index | next in thread | raw e-mail
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=249253 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. 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). Future Neighbor Solicitations will be answered by the current CARP MASTER correctly but until then traffic is still arriving at the BACKUP (former MASTER). 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/03c216ce761c84dbe6ab7611453931211e923986/sys/netinet/ip_carp.c#L1280 -- You are receiving this mail because: You are the assignee for the bug.help
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-249253-227>