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Multiple gateways in NT 4.0/win 95

IN windows NT 4.0 how to use multiple gateways for fault tolerance/redundancy.If one gw is down other one should come up dynamically?? Isn't it same for Win 95.I tried but seems to be another Microsoft vaulte-face...
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shivinder_jit
Asked:
shivinder_jit
1 Solution
 
jhanceCommented:
Both Win9x and NT support multiple gateways.  Just go to the Network Control Panel and define 2 or more.

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jhanceCommented:
BTW, under NT it's hidden under the Advanced button in the IPAddress tab on the dialog.
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shivinder_jitAuthor Commented:

Thanks jhance but I had already tried with advanced button by defining two entries as 170.2.15.1 and 170.2.25.1 and where 170.2.15.1 is non existent and 170.2.15.1 is working.So if I keep 170.2.15.1 as first entry the routing works but if I keep the 170.2.25.1 as first gateway which is non existent then the system does not pick the 170.2.15.1 gw either. Is there anything else to be set.
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shivinder_jitAuthor Commented:
This I have already tried but does not work.
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schmieguCommented:
Does the subnet mask differ from 255.255.0.0 ?
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bbaoIT ConsultantCommented:
"Windows NT computers can be configured with multiple default gateways. When a dead gateway is detected by TCP, it can direct IP to switch default gateways to the next gateway in the backup list. This switch can occur when there are multiple gateways configured for the same network adapter or when different default gateway addresses are given on various network cards on a
multihomed computer. A switch is triggered when TCP has tried one-half of the TcpMaxDataRetransmissions times to send a packet through the current default gateway." That means, NT supports it but with a few limits.

For more information, please visit MS online support for the following KB article:

Multiple Default Gateways Can Cause Connectivity Problems
http://support.microsoft.com/support/kb/articles/q159/1/68.asp

As for Windows 95/98, the feature is also supported. The following registry setting is used to enable or disable this feature on a Windows 95/98 box:

Hkey_Local_Machine\System\CurrentControlSet\Services\VxD\MSTCP\DeadGWDetect = 0 or 1

The value type is DWORD. It specifies whether Microsoft TCP/IP will use another gateway if the current default gateway seems to be down. The default is 1.
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