Date: Thu, 31 Oct 2013 21:58:08 +0000 From: Ole Myhre <ole.myhre@dataoppdrag.no> To: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: carp on 10.0 and ipv6 network route Message-ID: <C5A69C67E0D032469281F68C7CFD6AA009E3F3FB@EX-MBX01.cust-d1.dataoppdrag.no>
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Hi,
I'm testing carp on 10.0-BETA2, and there seems to be different
behaviour with the network route between IPv4 and IPv6 when using carp
on interfaces.
IPv4 routes are not present in the routing table when the interface is
in BACKUP state (as expected), but IPv6 routes are present in the
routing table in both BACKUP and MASTER state. This causes some issues
with routing daemons as the network route is announced to other
routers from both machines running carp.
[root@rtr1 ~]# ifconfig em2 vhid 1 192.168.0.1/24
[root@rtr2 ~]# ifconfig em2 vhid 1 192.168.0.1/24
[root@rtr1 ~]# ifconfig em2 | grep carp
carp: MASTER vhid 1 advbase 1 advskew 0
[root@rtr1 ~]# netstat -rn | grep 192.168.0.0
192.168.0.0/24 link#3 U 0 0 em2
[root@rtr1 ~]#
[root@rtr2 ~]# ifconfig em2 | grep carp
carp: BACKUP vhid 1 advbase 1 advskew 0
[root@rtr2 ~]# netstat -rn | grep 192.168.0.0
[root@rtr2 ~]#
[root@rtr1 ~]# ifconfig em2 inet6 2001:db8::1/64 vhid 1
[root@rtr2 ~]# ifconfig em2 inet6 2001:db8::1/64 vhid 1
[root@rtr1 ~]# ifconfig em2 | grep carp
carp: MASTER vhid 1 advbase 1 advskew 0
[root@rtr1 ~]# netstat -rn | grep 2001:db8::/64
2001:db8::/64 link#3 U =
em2
[root@rtr1 ~]#
[root@rtr2 ~]# ifconfig em2 | grep carp
carp: BACKUP vhid 1 advbase 1 advskew 0
[root@rtr2 ~]# netstat -rn | grep 2001:db8::/64
2001:db8::/64 link#3 U =
em2
[root@rtr2 ~]#
Thanks,
Ole
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