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KEN MATTISON
Beginner

Multihoming UCS servers with VPC between to N2Ks - Bandwidth Aggregation

        It was unclear to me from the CIsco VPC doc on whether a VPC (going to 2 separate 2Ks) will aggregate both links, and how does the process work for load balancing.   

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Reza Sharifi
Hall of Fame Expert

Yes, it will aggregate the ports by building Portchannels.  As far as the load balancing goes, it depend on the device, most layer-2 switches by default use MAC base load balancing, meaning packet from PC1/VM1 uses a one link and MAC from PC2/VM2 uses the other link.

HTH

Thanks for that reply. It makes sense. Also, since we are using VPC, I'm guessing that means we don't need to code any Spanning-tree portfast or other parms, correct? I say this because one of the consultants that set up our system, had spanning-tree parms coded eventhough the link was VPC.