CHAPTER 6
Troubleshooting vPCs
This chapter contains the following sections:
•
About Troubleshooting vPCs, page 45
•
Initial Troubleshooting vPCs Checklist, page 45
•
Verifying vPCs Using the CLI, page 46
•
Received Type 1 Configuration Element Mismatch, page 47
•
Cannot Enable the vPC Feature, page 48
•
vPCs in Blocking State, page 48
•
VLANs on a vPC Moved to Suspend State, page 48
•
Hosts with an HSRP Gateway Cannot Access Beyond Their VLAN, page 49
About Troubleshooting vPCs
A vPC allows links that are physically connected to two different devices to appear as a single port channel
by a third device.
Initial Troubleshooting vPCs Checklist
Begin troubleshooting vPC issues by checking the following issues first:
DoneChecklist
Is the vPC keepalive link mapped to a separate VRF? If not, it will be mapped to the
management VRF by default. In this case, do you have a management switch connected to
the management ports on both vPC peer devices?
Verify that both the source and destination IP addresses used for the peer-keepalive messages
are reachable from the VRF associated with the vPC peer-keepalive link.
Verify that the peer-keepalive link is up. Otherwise, the vPC peer link will not come up.
Cisco Nexus 9000 Series NX-OS Troubleshooting Guide, Release 7.x
45
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