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New Member

Dual side vPC FEX design constraint

So I've been reading Data Center Access Design with Cisco Nexus 5000 Series Switches and 2000 Series Fabric Extenders and Virtual PortChannels and came across a table that says dual homing FEXs to 5Ks is not supported when 2 5Ks and 2 7Ks are in a dual sided vPC topology.

Table 2 on page 8 of http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps9670/C07-572829-01_Design_N5K_N2K_vPC_DG.pdf

No Support for Fabric Extender DualHomed Design. I understand enhanced vPC is not supported on 7Ks yet. But it is on 5Ks. So if I dual home my 5Ks to 7Ks in a cross bar dual sided vPC topology, can I not dual home my FEXs to the 2 5Ks in a cross bar manner? Also, it says port channel teaming is not supported from servers. So does that mean if I have a server, can I not vPC it to both 5Ks using LACP or regular port-channel?

Maybe I'm reading it wrong, but would love some clarification!

1 REPLY
New Member

Re: Dual side vPC FEX design constraint

Now that I've read the entire document. Look at figure 42 on page 87. Dual sided vPC topology with enhanced vPC is a supported design. Guess I should've read through the doc.

Maybe the previous table had a pair of Nexus 5010/5020s that do not support enhanced vPC or perhaps it was a table before introducing enhaned vPC.

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