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FCOE ISL over existing Nexus 5000 Port Channel?

Hello forum users,


I have aa question about repicating EMC VNX Arrays between 2 data centers (3km distance) using FC(OE) over an existing PortChannel on Nexus 5548UP's:

Objective :
Interconnect 2 EMC VNX series Storage Arrays in order to replicate data using EMC Mirrorview.

EMC MirrorView can only use native FiberChannel or iSCSI.
Both VNX have already the native FC adapters on board, and in the Cisco Nexus switches, FC SFPs (DS-SFP-FC8G-SW) are foreseen for this purpose

2 datacenters; 2 x 2 Cisco 5548UP switches ,  each set in a different VPC domain
Already in place : Portchannel (VPC) between these 2 datacenters. L2 connectivity

Data center 1: Nexus 1 + Nexus 2 in VPC Domain xxx

Data center 2: Nexus 1 + Nexus 2 in VPC Domain yyy


    DC1 Nexus 1 -- single link -- DC2 Nexus 1

    DC1 Nexus 2 -- single link -- DC2 Nexus 2

OS version is NXOS 5.1.3N1 



Each VNX array will be connected to its local Nexus 01 (Fabric  A) and local Nexus 02 (Fabric B), thus respecting the “Dual Fabric” design practice.

How can we transport the FC traffic between the two data centers, while also respecting the separation of “Dual Fabric”.

Can we just create VFC (FCOE) Edge ports on each leg of the existing Ethernet port-channel? This way we would reuse the same ISL’s for Ethernet and FCOE.

Or de we need a dedicated link in each Fabric for FCOE ISL?


Thanks in advance,



Everyone's tags (1)
Cisco Employee

Hello there,In this kind of

Hello there,

In this kind of configuration the FCoE port-channel is not supported (vPC), even though FCoE dedicated links should be checked with EMC, because as you even said only supports FC links.
The better way is connected two dedicated FC links and maybe tuning the FC BB credits.

*Remember that FCoE E ports (connection between Nexus) must be dedicated to storage traffic anyway.