Re: net access failover
From: Barney Wolff (barney_at_databus.com)
Date: 12/27/03
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Date: Sat, 27 Dec 2003 16:28:09 -0500 To: mark abrams <mabrams@video-collage.com>
On Sat, Dec 27, 2003 at 03:57:16PM -0500, mark abrams wrote:
>
> I have a cable modem and and a dsl connction to my machine. I would like to
> use the cable modem as my default connection and automatically fail-over to
> the dsl connection if/when the cable modem goes down.
>
> Can routed(8) do this ? If so how? And is there a better way ?
I guess this should be a FAQ. For something that can be adapted to
do what you want, see http://www.databus.com/dslsec.tgz .
routed won't do it because (unlike real multihoming) your address on
the two networks is different and the ISPs are not sending you any
routing protocol packets. A simpleminded ping of the cable ISP's
router, and changing the default route when it goes away and comes back,
should work fine. NATing adds a little to the effort, if you do it.
Existing connections will not survive a transition, but that's usually
not a big deal.
-- Barney Wolff http://www.databus.com/bwresume.pdf I'm available by contract or FT, in the NYC metro area or via the 'Net. _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"
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