Hi. On 20.08.2015 14:51, Damien Fleuriot wrote: > > Hello list, > > > > We've managed to find the source of the bug, if it is indeed a bug. > > It all comes down to the order in which the IP addresses are assigned to > the interface from /etc/rc.conf. > > > When using the following syntax, the physical IP address is configured > AFTER the CARPs on the interface, which results in the CARP advertisements > being sourced from the CARP IP, triggering the double MASTER situation : > ipv4_addrs_int="1.2.3.4/24" > ifconfig_int_alias0="1.2.3.6/32 vhid 1 pass test advskew 20" > > When using either of the following syntaxes, the physical IP address is > configured BEFORE the CARPs, which results in the CARP advertisements being > sourced from the physical IP and restoring normal functionality : > ifconfig_int="inet 1.2.3.4/24" > ifconfig_int_alias0="1.2.3.6/32 vhid 1 pass test advskew 20" > OR > ifconfig_int_alias0="1.2.3.4/24" > ifconfig_int_alias1="1.2.3.6/32 vhid 1 pass test advskew 20" > It has been there since carp-ng was commited to the 10-CURRENT 2 years ago. The thing is, carp-ng doesn't need a non-carp address on an interface anymore, both nodes can work fine using only shared address. This isn't comfortable in lots of cases, but still. Thus, kernel sends carp advertisements from a primary address on the interface (which is normal behavior for any known network stack) and for FreeBSD that primary address has always been the first address on an interface for a given AF. Thus, your split-brain carp situation cause lies definitely somewhere else. I'm running carp on FreeBSD for years, including legacy one; if there is a bug - the situation you are describing probably isn't one.
Eugene. _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
