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Only 10 out of 12 network interfaces are visible to the OS

Posted on 2011-09-14
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Last Modified: 2012-05-12
Hi Experts,

I am experiencing this issue that only 10 out of 12 network interfaces are visible to the OS (Windows 2008 R2 Enterprise).

We have 2 Intel 10Gb iSCSI cards with 2 interfaces each, and 2 Broadcom 1Gb cards with 4 interfaces each.

I am seeing all 4 interfaces for Intel and only 6 interfaces for Broadcom.

Any advice will be appreciated.

Jimmy
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Question by:jimmy1829
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Expert Comment

by:bigeven2002
ID: 36538695
Hello,

On the broadcoms, can you tell if the 2 not working are on the same card or 1 on each?  If both are on the same card, that would indicate a possible failure on that card.  In the 2 that are not responsive, does it show any link lights on the card for those ports?
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by:jimmy1829
ID: 36538724
thanks, both are on the same card, and it does not seem to light up when I plug in the cables.
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Accepted Solution

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bigeven2002 earned 2000 total points
ID: 36539791
I see.  The only things I can think of:

First, try 2 different network cables for both problem ports.  

Second, try 2 different ports on your switch.  If you don't have any spare ports, unplug one of the working ones and plug the bad one in to see whether or not it is a bad port on the switch.  

Third, go to network adapter properties in windows to see if these ports on the card were mistakenly disabled.

Lastly, if you are able to take the server offline, open it up and try a different PCI-E slot for the problem card if you have one open.

If none of the above are successful, then the card itself has gone bad and needs to be replaced.
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Author Comment

by:jimmy1829
ID: 36546798
thanks, I will give it a shot.
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