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Intel X520-T2 with matching NICs?


As I'm beginning to utilize my second port on some of my Intel X520-T2's, I noticed that one of them has the same MAC address assigned to both ports!?! I checked my other X520-T2s (I have 14 of them), and this is the only one showing up like this. Has anyone seen this before, and, is there a way to fix it?

Theoretically, I can change the MAC address in software, but generally that involves saying: change MAC address X to MAC address Y, but I think that could lead to interesting results as both ports already have MAC address X.

I'm running RHEL 6 on this machine. dmesg shows as follows:

ixgbe 0000:01:00.0: (PCI Express:5.0GT/s:Width x4)

ixgbe 0000:01:00.1: (PCI Express:5.0GT/s:Width x4)

typically that second line should be mac_address_X+1.

Any insight would be appreciated. Thanks,

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Valued Contributor I

Hi aodash,

Thanks for your post.

The 2 ports in the adapter should have different MAC address. Your observation is correct, the MAC addresses usually have a difference of 1.

As we know, the MAC address in a network should be unique.

Please Contact Support to have your card replaced.



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