> I know there's been lots of discussion about 'load balancing' in the past,
> over two similar link types.
>
> I want to do something a little different but in the same vein. Our
company
> currently has a 2mb ADSL line, and for the most part it works great.
> However, we might be taking on a leased line in the future, as we have a
> mailserver/transaction server that we would like to ensure is always
online.
> (Always is a relative term, of course, compared to the DSL!). This will
> probably only be 64k though.
>
> Anyway, what I would like to do is ensure all WWW/outgoing mail/downloads
et
> al goes over the 2mb line (fast, no bandwidth charges!) but the
'important'
> traffic (incoming mail, incoming www requests) goes over the leased line.
This much you can handle with proper network setup. Your DSL internface and
leased line will presumably have seperate IP addresses, so just setup your
firewall rules so the internal network masquerades to the internet on your
DSL line, and provide the IP of your leased line in DNS lookups for your www
& inbound mail address.
> Also if the DSL line fails, everything needs to go over the leased line.
There are several folks who have setup fail-over (or at least talked about
it). IIRC, the typical method is to have a script ping your DSL gateway
periodically. If it becomes unreachable, the firewall rules are
re-configured to masquerade internal traffic out the secondary interface.
Search the list archives for details...
Charles Steinkuehler
http://lrp.steinkuehler.net
http://c0wz.steinkuehler.net (lrp.c0wz.com mirror)
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