About CARP, trouble or feature ?

[Prokofiev S.P.]

I have a problem with CARP on FreeBSD 6.2 in the following scheme:


+--------------+     +-----------------------+     +-----------------+
|     A        |     |          B            |     |       C         |
|       vlan20 |-//->| vlan20         vlan10 |-//--| vlan10          |
+--------------+     +-----------------------+     +-----------------+


vlan20 10.10.10.2/26  vlan20 10.10.10.1/26
gateway 10.10.10.1    vlan10 10.10.9.1/26          vlan10 10.10.9.2/26

                       carp10 10.10.9.3/26          carp10 10.10.9.3/26
                                  advskew 0                   advskew 1
                       carp11 10.10.9.4/26          carp11 10.10.9.4/26
                                  advskew 1                   advskew 0


i.e. server B - MASTER for 10.10.9.3/26, BACKUP for 10.10.9.4/26
      server C - BACKUP for 10.10.9.3/26, MASTER for 10.10.9.4/26


But if to send icmp request from server A -> to server C on ip 10.10.9.4,
server B reply from BACKUP iface carp11 !?!?

This is trouble or feature of realization ?????
-------------------------------------------------

serverB> ifconfig carp*
carp10: flags=49<UP,LOOPBACK,RUNNING> mtu 1500
          inet 10.10.9.3 netmask 0xffffffc0
          carp: MASTER vhid 100 advbase 1 advskew 0
carp11: flags=49<UP,LOOPBACK,RUNNING> mtu 1500
          inet 10.10.9.4 netmask 0xffffffc0
          carp: BACKUP vhid 101 advbase 1 advskew 1

serverC> ifconfig carp*
carp10: flags=49<UP,LOOPBACK,RUNNING> mtu 1500
          inet 10.10.9.3 netmask 0xffffffc0
          carp: BACKUP vhid 100 advbase 1 advskew 1
carp11: flags=49<UP,LOOPBACK,RUNNING> mtu 1500
          inet 10.10.9.4 netmask 0xffffffc0
          carp: MASTER vhid 101 advbase 1 advskew 0


Tell please when will be an option "carpdev" in FreeBSD?

Thanks...