Nexus VPC

What is the correct spanning tree type to use when connecting Nexus 5548 switches together in a back to back fashion using Virtual port channels.

                   5548-upstream  VPC to ( 5548-1 and 5548-2)

I believe that under the port channel it should be

int port-channel 100
switchport
switchport mode trunk
spanning-tree port type normal

Some of my peers are telling me that it should be

spanning-tree port type network


It is my understanding that "port type network" should only be used on the peer-link
sectelAsked:
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eeRootCommented:
Technically, "type network" is the correct option.  Although both will work.  The main difference is that with "type network", the port will be disabled if BPDU packets from another switch are NOT detected.

http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/CLIConfigurationGuide/SpanningEnhanced.html#pgfId-1090121

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sectelAuthor Commented:
Not a bad article...still not really conclusive as to where to use the Network type.
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