Configuring additional gateways on network interface

[Guest]

We went into TCP/IP configuration and added a second default gateway to our
Windows 2003 server. Both are a single hop from the server, but only the
first configured gateway will work successfully. We have two internet
connections that we are attempting to use as failover. When the internet on
the first fails, however, the server does not begin using the second. Does
anyone know of a way to get this to work?

 

[Neteng]

You need routing, not multiple gateways.

 

[Guest]

But both gateways are on the same subnet.

You need routing, not multiple gateways.

 

[Neteng]

You can't have multiple gateways on the server. You need to let a routing
protocol determine which internet gateway to use.

 

[Phillip Windell]

What you are asking about is called "Dead Gateway Detection" (both gateways
in same subnet). It is not going to behave as smoothly as you wish. Here
are the characteristics of 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 [MCP, MVP, CCNA]
www.wandtv.com
-----------------------------------------------------
Understanding the ISA 2004 Access Rule Processing
http://www.isaserver.org/articles/ISA2004_AccessRules.html

Microsoft Internet Security & Acceleration Server: Guidance
http://www.microsoft.com/isaserver/techinfo/Guidance/2004.asp
http://www.microsoft.com/isaserver/techinfo/Guidance/2000.asp

Microsoft Internet Security & Acceleration Server: Partners
http://www.microsoft.com/isaserver/partners/default.asp