Trouble seeing vhba from UCS on Nexus 5k

I have UCS > 6100(a/b)> nexus 5k (a/b) > emc vnx 5300.  I have two vsans setup and my switch can see both ports on my vnx5300 with show flogi. However, my 5ks do not see the vhba on the ucs system. I have two vhba configured, one for fabric a and one for fabric b. As of now the nexus is connected to the 6100 as a port channel. Port-channel is configred as a trunk. Now this makes me think this is where the vsan communication is failing. Does the connection to the 6100 and nexus need to be something more than a simple trunk?
Dennis

Dennis,
I hope you're taking about Fiber Channel uplinks to your N5K and not Eth/FCoE (there's no multihop FCOE yet).
Assuming you have your 6100's with FC trunks to your N5Ks, and the N5K have "npiv" enabled, you should see the flogi from your Host vHBAs.
From the 6100 CLI you can also "connect nxos" and do "show npv flogi" which will show you FC sessions between your 6100 and N5K - which I think is where you problem is.
All your SAN connections would travel over the 6100 Fiber Channel module, up to the N5K Fiber Channel module, then to your array.  You can still trunk and SAN port channel your FC uplinks.  Just confirm this is what you've done and not using Ethernet Uplinks to your N5K expecting that to work.
Can you provide a diagram or detail the exact topology (Eth, FC etc)
Regards,
Robert

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