Re: Routing over two interfaces
From: Phillip Windell (_at_.)
Date: 12/03/04
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Date: Fri, 3 Dec 2004 12:20:18 -0600
"McKee" <McKee@discussions.microsoft.com> wrote in message
news:2E4BD284-B70E-4FA8-9484-8471EFEC41A2@microsoft.com...
> Now I have a SBS2003 server and I can't achieve a similar configuration.
I
> want the default outgoing route to be on a public subnet, but still have
> incoming traffic on the private subnet succeed. Unlike the previous
> configuration, both these NICs are on the same physical network, but I
assume
> that's not a problem
Yes, that is a problem. They must be different subnets.
175767 - Expected Behavior of Multiple Adapters on Same Network
http://support.microsoft.com/default.aspx?scid=kb;EN-US;175767
> (both subnets have their own route out to the Internet).
No, what they have is a routing conflict.
> If I add a second 0.0.0.0 route to the routing table pointing to the
private
> IP network's router, then the private network becomes the default outoing
> route, which I don't want.
A machine can have only one Default Gateway (if you expect it to behave
logically). The Default Gateway should be on the Public Internet side, the
private internal side is to be handled by Static Routes.
> I assume it's because the private subnet has a
> lower numeric value than the public subnet- it always appears before the
> public subnet in the routing table.
The "binding order" in found at:
1. Properties of Network Places
2. Choose "Advanced" from the menu at the top
3. Choose "Advanced Settings..." from the dropdown menu
4. the rest should be obvious from there
> Is there a way to order the routing table entries so both NICs can have
> successful incoming communications, but re-order the routing tables so
that
> the higher numeric value subnet is the preferred outgoing route? I think
> I've tried tinkering with metric values to no avail.
Since SBS by nature is also a Domain Controller, DNS, and probably WINS and
DHCP, all of the following articles are relevant in some way or another and
decribe the expected problems if you don't handle things properly.
175767 - Expected Behavior of Multiple Adapters on Same Network
http://support.microsoft.com/default.aspx?scid=kb;EN-US;175767
157025 - Default Gateway Configuration for Multihomed Computers
http://support.microsoft.com/default.aspx?scid=kb;en-us;157025&Product=win2000
272294 - Active Directory Communication Fails on Multihomed Domain
Controllers
http://support.microsoft.com/default.aspx?scid=kb;en-us;272294
191611 - Symptoms of Multihomed Browsers
http://support.microsoft.com/default.aspx?scid=kb;EN-US;191611
(applicable to other OSs besides XP)
Microsoft Windows XP - Multihoming Considerations
http://www.microsoft.com/resources/documentation/windows/xp/all/reskit/en-u
-- Phillip Windell [MCP, MVP, CCNA] www.wandtv.com
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