Dell R710 Intel network card installation

Hi all,

I have a problem with Dell R710. Originally it came with Broadcom network cards, but we have to add Intel. We've replaced it with Intel I350T2BLK, but I can't use it - no traffic. In the OpenManage we can see:

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"eth6" NIC details are odd as well:

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There is Citrix XenServer 5.5 OS.

Please advise what is wrong with new network card and how to fix it?

Thanks,