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 From:  Lee Azzarello <lee dot azzarello at ps dash solved dot com>
 To:  m0n0wall list <m0n0wall at lists dot m0n0 dot ch>
 Subject:  Re: [m0n0wall] Any way to make dhcp on m0n0wall send two gateway IP's to clients?
 Date:  Mon, 27 Jun 2005 14:57:46 -0400
On Mon, 2005-06-27 at 19:36 +0200, tor at studentergaarden dot dk wrote:
> I am currently trying to use two m0n0wall boxes to eliminate the risk of
> downtime due to hardware failure on a single box. Each machine now acts as
> a gateway and DHCP server, serving IP's from two different IP ranges
> within the same subnet.
> Everything seems to be working fine with this setup. However, I'd really
> like to make DHCPD on both machines provide clients with two gateway
> adresses, that is the adress of each machine. Apparently windows can
> accept a primary and a secondary gateway address, and automatically try
> the other if one fails.

This is a Windows only thing. Having two default gateways defeats the
purpose of having a default gateway. For real fault tollerance, you
should look into real high availability like OpenBSD's pfsync + CARP.

Lee Azzarello
Network Engineer
Progressive Solutions
+1 212 937 8939