Re: Sharing ISPs

"rg" <rg@xxxxxxxxxxxxx> wrote in message
news:eSjE10IeJHA.6012@xxxxxxxxxxxxxxxxxxxxxxx

Anyway, I thought SBS meant "Small Business Server," the single platform
solution to all the needs of a small business. I'm not asking about "Big
Business Server Facility" where we have separate RAS, Exchange, Web, etc.,
platforms and all the fancy hardware that goes with it.

There's marketing,...then there is the real world. It is "Small Business"
because of the limitations built into it. It doesn't meet *all* needs of a
small business,...it meets the needs it was designed to meet,...there is a
big difference there.

The duel ISP thing has nothing to do with SBS. SBS is not a Server, not a
"Router",...when you add ISA to it you have a Firewall and a simple "low
end" LAN Router.

The newer "home user" NAT Boxes have been incorporating line failover for
may a year or so. Commercial grade Routers have always been able to do this
but they do it with Dynamic Routing Protocols like RIP, IGRP, OSPF, etc.

Without an upstream device built to handle this you are stuck with the
abilities built into Windows,...and ISA just depends on Windows for that.
It is clunky, undependable, and not likely to satisfy what you are looking
for,...hence why we hardly ever mention it and the standard answer is "No
you can't do that".

I couldn't verify it with these articles, but the multiple Gateways may need
to be on the same subnet on the same Nic,...which is not going to happen
with two ISPs.
Here's the links if you want to "punish" yourself with trying this:

128978 - Dead Gateway Detection in TCP/IP for Windows NT
http://support.microsoft.com/default.aspx?scid=kb;EN-US;128978

171564 - TCP/IP Dead Gateway Detection Algorithm Updated for Windows NT
http://support.microsoft.com/default.aspx?scid=kb;EN-US;171564


--
Phillip Windell
www.wandtv.com

The views expressed, are my own and not those of my employer, or Microsoft,
or anyone else associated with me, including my cats.
-----------------------------------------------------




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