Multiple ISP configuration question
From: Bill Harrison (tech_at_internetapollo.com)
Date: 05/29/04
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Date: Sat, 29 May 2004 14:06:50 -0500
We have just begun to experiment with ISA Server 2000. It is sitting on a
Win2K SP4 Advanced
Server. Our office uses DSL for web access. Since we are located in a
rapidly growing area in terms of construction, we have lost our connection
pretty frequently. A large portion of our business depends on internet
access. I devised this plan to put in a redundant connection using our local
cable company. My theory is that we are less likely to lose both the phone
based and cable based simultaneously. Redundancy, redundancy. At the very
basic level, I can achieve the redundancy by manually plugging the external
NIC into whichever modem is live. This would still leave us with a minute or
two of downtime as the connection is manually switched. It also would mean
that the idle connection would be wasted most of the time. I'd like to put 3
NICs in my ISA server. NIC 1 is my internal, NIC 2 connected to the DSL
modem and NIC 3 to the Cable modem. So far this is all conceptual. The part
I'm trying to mentally figure out is a clean way to have the ISA Server
balance the traffic between NIC 2 and NIC 3. Basically, if DSL is
experiencing a lot of web traffic, start funneling more requests to the
cable connection.
The actual goal: Web traffic passes through ISA Server 2000 and the traffic
is balanced between the two providers
I hope that I explained this well. Thanks for any input!
Bill
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