Nexus 7000 and 2000. Is FEX supported with vPC?

I know this was not supported a few months ago, curious if anything has changed?

Hi Jenny,
I think the answer will depend on what you mean by is FEX supported with vPC?
When connecting a FEX to the Nexus 7000 you're able to run vPC from the Host Interfaces of a pair of FEX to an end system running IEEE 802.1AX (802.3ad) Link Aggregation. This is shown is illustration 7 of the diagram shown on the post Nexus 7000 Fex Supported/Not Supported Topologies.
What you're not able to do is run vPC on the FEX Network Interface that connect up to the Nexus 7000 i.e., dual-homing the FEX to two Nexus 7000. This is shown in illustrations 8 and 9 of under the FEX topologies not supported on the same page.
There's some discussion on this in the forum post DualHoming 2248TP-E to N7K that explains why it's not supported, but essentially it offers no additional resilience.
From that post:
The view is that when connecting FEX to the Nexus 7000, dual-homing does not add any level of resilience to the design. A server with dual NIC can attach to two FEX  so there is no need to connect the FEX to two parent switches. A server with only a single NIC can only attach to a single FEX, but given that FEX is supported by a fully redundant Nexus 7000 i.e., SE, fabrics, power, I/O modules etc., the availability is limited by the single FEX and so dual-homing does not increase availability.
Regards

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    FEX              FEX
    Server connected to both FEX
    The question is we have two routers connected to each of the Nexus 7k in HSRP (active and one is standby). How can I configure HSRP on the nexus switches and how the traffic will routed from the Standby Nexus switch to Active Nexus switch (I know HSRP works differently here as both of them can forward packets). Will the traffic go to the secondary switch and then via the peer link to the active switch and then to the active router ? (From what I read the packet from end hosts which will go via the peer link will get dropped)
    Has anyone implemented this before ?
    Thanks

    Hi Kuldeep,
    If you intend to put those routers on a non-vpc vlan, you  may create  a new inter-switch trunk between the N7K and allow that non-vpc vlan . However if those will be on a VPC vlan, best to create two links to the N7K pair and create a VPC, otherwise configure those ports as orphan ports which will leverage the VPC peer link .
    HTH
    Jay Ocampo

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