On Sun, Apr 11, 2004 at 07:48:40AM -0600, Role Account for SysAdmin wrote:
> In my network I have 4 NICs
> ----------------------------------------
> 1) $ext /30
>           inet xxx.xxx.xxx.xxx 255.255.255.252 NONE
> 2) $dmz (part of a routable /26)
>           inet xxx.xxx.xxx.xxx 255.255.255.192 NONE
> 3) $lan /24
>            inet 192.168.1.1 255.255.255.0 NONE
> 4) $air /30 (a nic to a wireless router, part of my wireless gateway).
>            inet 10.1.1.1 255.255.255.252 NONE
> 
> Will CARP work with my routable /30 address, which connects me to my ISP, 
> the DMZ's routable /26 block, and the private /24 & /30 I use for corporate 
> LAN, and wireless gateway?

The nasty workaround for this problem is to set the real address on the
physical interface for both your boxes to the network address, and use
the "regular" address as the carp address.

So if your /30 is 192.168.6.64/30, you have the following:

192.168.6.64 - network address - assign to physical interface on both boxes
192.168.6.65 - gateway
192.168.6.66 - your address - assign to carp interface
192.168.6.67 - broadcast

This is an unsavoury solution, and may break things, but I know that
there are people out there using it. A better solution is planned for
the carp code, but it's tricky.

-Ryan

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