10gig NIC - Link Delay

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Hi

I am having real trouble with a new batch of Intel NIC's - We were
using another type of 10gig card and they were fine but got EOL'd from
Intel and are now using something subtly different.
I dont have all the details yet on the issue but basically there is a
major delay in when the link comes up and this is causing major issues
with PXE amongst other things. The log states this

Nov 23 23:18:53 xxx kernel: ADDRCONF(NETDEV_UP): eth0: link is not ready
Nov 23 23:19:09 xxx kernel: ixgbe: eth0 NIC Link is Up 10 Gbps, Flow
Control: RX/TX
Nov 23 23:19:09 xxx kernel: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready

So 16 seconds for the link to come up - The only real difference
between the old card and the new is that the new seems to support FCOE
whereas the older one didnt

Has anyone got any clues as to what causes link delays?

thanks
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