Multiple NIC Path Selection Issue / Disconnection Issue

From: Apaseall (Apaseall_at_discussions.microsoft.com)
Date: 12/14/04 

Date: Tue, 14 Dec 2004 15:37:03 -0800

Hi,
Hope this is the correct place to ask this question.
Please advise if incorrect.

Situation is fairly simple (or at least I will try and describe it simply).
I am looking at 2 PC's both with 2 NIC's. These are part of a network
consisting of 3 PC's in total.

1 NIC in each of the 2 PC's connects to a switch. This switch then connects
to a third PC which provides internet connectivity. This switched network is
@ 100 Mbps, and works fine (I can see the internet from all PC and can share
files etc).

This switched network is a 192.168.0.* network.
The third PC runs NAT & DNS for switched network.

The other two NIC's in the PC's I am looking at are connected to each other
via crossed cable, running @ 1 Gbps, and on a 192.168.2.* network.

What I want is to use the 100 Mbps switched connection for internet.
I want to use the 1 Gbps direct connection for file transfers between the
two PC's I am looking at.

Heres the thing.
I can disable the internet connections or unplug cables for the switched
network. At that point the 1 Gbps network is the only available network and
appears to run ok. Ping works fine and large file copy activity works
(although network utilization never gets above 20 percent, I suspect HDD
transfer limit).

I can then enable the switched network by either re-plugging or enabling.
Both networks appear stable. Ping to any network card is possible at this
initial point.

However if I now try and copy a large file (or folder with 2 or more files
of at least 700 Mb) the 1 Gbps connection keeps disconnecting and
reconnecting very rapidly.

Sometimes these disconnections appear to be over looked and the file(s)
transfers ok.
Other times the file(s) cannot be copied, and browsing to the files source
gives error messages, ping to 1 Gbps NIC's not possible. I can however
re-explore the network tree to the source of the file by moving down the
network places tree.
Finally the transfer sometimes takes place over the 100 Mbps switched network.

So in summary is there a way to force usage of the 1 Gbps direct connection
in preference to using the 100 Mbps ?

BTW the switch is only capable of 10/100 Mbps.
Cables are new and have been moved around possible connections so I would
like to rule that out.

Any further details gladly given.
 

Relevant Pages

  • RE: Multiple NIC Path Selection Issue / Disconnection Issue
    ... > This switched network is a 192.168.0.* network. ... > What I want is to use the 100 Mbps switched connection for internet. ... > I want to use the 1 Gbps direct connection for file transfers between the ...
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  • Re: AW: AW: security-basics Digest 18 Jun 2003 22:09:15 -0000 Issue 6 18
    ... > An non-switched network worked on the star principle. ... > packets that are for it. ... you ask yourself how can i sniff on a switched network if all i get is ... >> Evaluating SSL VPNs' Consider NEOTERIS, chosen as leader by top analysts! ...
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    ... An non-switched network worked on the star principle. ... packets that are for it. ... you ask yourself how can i sniff on a switched network if all i get is ... > Evaluating SSL VPNs' Consider NEOTERIS, chosen as leader by top analysts! ...
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