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David WhyteFlag for United Kingdom of Great Britain and Northern Ireland

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Two Internet Conenctions on one Network, how to send clients to 2nd connection

Hi,

I have a small network with about 40 machines on and recently had a second internet connection added to the network for a certain set of users. These users have static IP addresses so I changed their default gateway from 254 (existing internet gateway ip) to .253 (new faster connection). Although this is working for the most part, the machines seem to have some issues access shares on the network and Ive had to resort to using local accounts of the network resources rather than the domain accounts since I get errors indicating there is no domain controller on the network to service the access request. When I change the gateway back to the previous setting, things start working again.

The DC is an SBS2011 box and its on 192.168.16.2 whilst the internet routers on .253 and .254 respectively. The clients are a mixture of Win 7/10.

Why would changing the gateway address have this effect and how can I get around it?

Ta
SycamoreIT
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andrew1812
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Normally, we will use a dual Wan router with load balancing to connect to two ISPs.
If you ONLY changed the gateway, users should not have a problem.

If you ALSO changed DNS, then users will have a problem.  All users should be using the SBS server and ONLY the SBS server for DNS.  

DOUBLE CHECK THIS.

If that's not the case, then start your investigation where ALL investigations of Windows problems that don't have obvious solutions work should begin.  The Event Logs.
Addressing the question as posted:
Dual WAN routers generally have binding rules that will keep certain traffic on one WAN connection or the other.  Perhaps that's something you had in mind?
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Thank you