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Date: Mon, 02 Jun 2008 09:44:57 -0700
From: Rudy <crapsh@MonkeyBrains.NET>
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Subject: carpdev?
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Any plans for carpdev in FreeBSD?  I'd be happy to poke around the 
OpenBSD source and try to get it working on FreeBSD.  (Emphasis on the 
_try_)

http://lists.freebsd.org/pipermail/freebsd-pf/2006-July/002429.html
http://www.openbsd.org/faq/faq6.html#CARP

Quick question:
I notice the IP in carp examples is always a /24.  If there is already a 
/24 IP on the 'host' interface for the carp device, why is it not a /32 
(like when an alias is issued)?

 hostname="hosta.example.org"
 ifconfig_fxp0="inet 192.168.1.3 netmask 255.255.255.0"
 cloned_interfaces="carp0"
 ifconfig_carp0="vhid 1 pass testpass 192.168.1.50/24"


Carpdev would get rid fo the 192.168.1.3 requirement and have something 
similar to vlandev.

Rudy