During a recent Nexus deployment I came across a very small problem which was very easily solved.
When doing a sh int brief on the Nexus 5548 I saw the following
Eth1/17 1 eth access down SFP validation failed 10G(D) —
Eth1/18 1 eth access down SFP validation failed 10G(D) —
The SFP’s that are in these slots were DS-SFP-FC8G SW
The reason is that in a Nexus 5548 the ports can either run as Ethernet or Fiber Channel. The default configuration is Ethernet. To change the mode of the port
NX5548-SW1# conf t
Enter configuration commands, one per line. End with CNTL/Z.
NX5548-SW1(config)# slot 1
NX5548-SW1(config-slot)# port 25-32 type fc
NX5548-SW1(config-slot)# end
NX5548-SW1# copy run start
[########################################] 100%
NX5548-SW1# reload
The Cisco doc is here
http://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/release/notes/Rel_5_0_3_N1_1/Nexus5000_Release_Notes_5_0_3_N1_1c.html#wp341614
Once the switch has reloaded the ports now show as FC and up!
fc1/31 1 auto on up swl F 8 —
fc1/32 1 auto on up swl F 8 —
