Fcoe for ethernet AND san

I'm having a bit of a brain fart....
I see that you can create an "unified" uplink from the 6248s to an upstream Nexus 5k.  Can I use this single uplink for both VSAN and VLAN traffic, or si the best practice to separare them into an Ethernet uplink and a FCOE San uplink?
Thanks in advance.

I'm not sure of any immediate disadvantages.  A lot of design related inputs to separate LAN and SAN are related to pacing the integrating of the two networks. 
If your already running FCoE and your not migrating from a pure LAN and Fibre channel environment to FCoE - then I'd run both on a unified link.
Please rate helpful posts.

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