Nexus 7K VPC Hashing

[prasad.gsmc]

Dear All,

I have observed that after VPC the Nexus show port-channel summary will show only the local Interface of the box.

With this, each individual box has visibility to only locally connected interface. Cosider the attached diagram. According to this, the N7K will only forward out via local E1/1 and E1/2 to reach server on N5K. The VPC is not capable of combined throughput, but only ensures a loop free patch ?

effective throughput can only achieve by proper load feeding to both boxes (from uplinks)....

is this the correct understanding ?

[Robert Taylor · Accepted solution]

Correct ... traffic in direction of n5k connected client requires proper load sharing to the n7k in order to maximize throughput.

From a single 7k, effective unidirectional throughput is simply limited to the locally connected interfaces.

So, assuming "uplink A" and B are routed, you would want to implement load sharing to the n7k from upstream in order to maximize throughput.

[prasad.gsmc]

thanks...

I have re recorded my understanding  on VPC !