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multiple Internet connections to a windows small business server

rberke
rberke asked
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Last Modified: 2015-11-07
Our SBS 2003 is used for shared files and internet connectivity. (Our websites and email are hosted at external ISP sites, so server01 doesn't  care about them.)

in 2010 I configured a very simple network that looks like this:

server01 ----- netgear fvs318 ------ ISP provided adtran ------ dynamic T1 ---- Old ISP with 8 static IPs 200.x.x.49 to 200.x.x.56

We now  want to convert our internet to Time Warner, but we will keep our old ISP as a "Hot backup" that can be used if TWC fails.

We have two possible configurations we are considering.
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configuration #1 is nearly identical to the old configuration, so I can set that up without any experts-exchange help.

server01 ---patch #1-- RV325 ------ TWC provided modem ------ 10 mbps fiber  ---- TWC with 8 static IPs 201.x.x.57 to 201.x.x.64

( disconnected ) "HOT BACKUP"  netgear fvs318 ------ ISP provided adtran ------ dynamic T1 ---- Old ISP

If TWC cable goes down, I move patch cable #1 from RV325 to the FVS318, and we are back in business with just a few changes to SERVER01's NIC tcp settings.

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Configuration #2 is harder, but my boss thinks it is worth the effort.  He wants to use the RV325 as a load balancer to keep BOTH circuits going at the same time.  I currently don't know enough about networking to accomplish that goal.

Can anybody give me some direction? For instance, do we have to put another NIC into  SERVER01?  Can it even be done with SBS 2003? How about if we upgraded to SBS 2008 or higher?  Or perhaps a different kind of router instead of an RV325?
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