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List:       openbsd-pf
Subject:    failover problem
From:       "Michael W. Lucas" <mwlucas () blackhelicopters ! org>
Date:       2004-07-09 8:25:29
Message-ID: 20040709082529.GA77384 () bewilderbeast ! blackhelicopters ! org
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Hi,

Google just hasn't been too helpful tonight, so I'm trying here.

I'm having a problem with carp on two i386 systems.  Both machines are
3.5-snapshots, the first running 3.5 GENERIC#5 and the second 3.5
GENERIC#127.

The master/backup status passes cleanly between the two machines, but
when the second machine becomes master it has difficulty passing
traffic to some hosts behind it.

When carp machine 2 comes up (the newer one), it can telnet to port 80
on a particular Web server, but machines outside the PF cluster
cannot.  It doesn't seem to be a routing problem; I can hit some IPs
in the same net block, but not others.

My first thought was some sort of arp problem, but all the arp
addresses for other network devices match between the two PF machines.
If I log into machine 2 and run "arp -ad", however, the problem goes
away and machine 2 passes traffic normally.

Any suggestions?

Thanks,
==ml

-- 
Michael Lucas		mwlucas@FreeBSD.org, mwlucas@BlackHelicopters.org
   "I'm sorry, but 'Social Darwinism' is no excuse for killing all of 
	           your co-workers."  -- Ivan Brunetti
		http://www.BlackHelicopters.org/~mwlucas/
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