Carp, vlan, routing...

Hello ALL!
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 replay 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


/etc/sysctl.conf:
net.inet.carp.preempt=1
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