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Date: Mon, 13 Nov 2006 13:21:15 +0200 (EET)
From: "Prokofiev S.P." <proks@logos.uptel.net>
To: freebsd-questions@freebsd.org
Message-ID: <20061113113327.X78014@logos.uptel.net>
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Subject: CARP: trouble or feature
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Hello ALL!
I have a problem with CARP on FreeBSD 6.2 in the following scheme:


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


  vlan10 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