freebsd stable - Jun 2015 - CARp comatibility between 9 and 10

I have a pair of firewalls running FreeBSD 9 to upgrade
to 10 next week. I know CARp was rewritten, but I was wndering a few
things before I started. Mainly is it possible to have one
machine running 9 and one running 10 with the failover working
between themproperly. The reason I am wondering s that on 10 it appears
you set a VHID per IP address, whereas on 9 it is per interface. I have
multiple IP addresses on the carp interfces on 9, so on 10 can I simply
set them up all with the same VHID, or is that not supported ?

Thanks for any avice which might make Monday morning back in the office
go a bit easier :)

-pete.

> Am 07.06.2015 um 12:33 schrieb Pete French <petefrench at
ingresso.co.uk>:
> 
> I have a pair of firewalls running FreeBSD 9 to upgrade
> to 10 next week. I know CARp was rewritten, but I was wndering a few
> things before I started. Mainly is it possible to have one
> machine running 9 and one running 10 with the failover working
> between themproperly. The reason I am wondering s that on 10 it appears
> you set a VHID per IP address, whereas on 9 it is per interface. I have
> multiple IP addresses on the carp interfces on 9, so on 10 can I simply
> set them up all with the same VHID, or is that not supported ?
> 
> Thanks for any avice which might make Monday morning back in the office
> go a bit easier :)
> 


I did this a while ago - and it actually worked.
(CARP between 9 and 10).

I think I have each IP assigned its own VHID, though.