RE: Multiple NIC Path Selection Issue / Disconnection Issue
From: Pavel A. (pavel_a_at_NOwritemeNO.com)
Date: 12/16/04
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Date: Thu, 16 Dec 2004 11:15:01 -0800
Well it seems that the driver of one netcard under high load monopolizes
the cpu, and causes starvation of another card.
Try different netcards.
--PA
"Apaseall" wrote:
> 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.
>
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