Cannot Enable The Vpc Feature; Vpcs In Blocking State; Vlans On A Vpc Moved To Suspend State - Cisco Nexus 9000 Series Troubleshooting Manual

Cannot Enable the vPC Feature

STP MST Region Instance to
VLAN Mapping
STP Loopguard
STP Bridge Assurance
STP Port Type
STP MST Simulate PVST
Allowed VLANs

Cannot Enable the vPC Feature

You might receive an error when you enable the vPC feature.
Symptom
Cannot enable the vPC
feature.
This example shows how to display the module hardware version:
switch# show module
Mod Ports Module-Type
--- ----- ----------------------------------- ------------------ ----------
22
24
26
27
29
30
Mod Sw
--- ---------------- ------
22
24
26
27
29
30

vPCs in Blocking State

vPCs might be in the blocking state because of bridge assurance (BA).
Symptom
vPC is in blocking state.

VLANs on a vPC Moved to Suspend State

VLANs on a vPC might move to the suspend state.
Cisco Nexus 9000 Series NX-OS Troubleshooting Guide, Release 7.x
48
Possible Cause
The hardware is incompatible with
the vPC.
0 Fabric Module
0 Fabric Module
0 Fabric Module
0 Supervisor Module
0 System Controller
0 System Controller
Hw
6.1(2)I1(1) 0.4040
6.1(2)I1(1) 0.4040
6.1(2)I1(1) 0.4040
6.1(2)I1(1) 0.4080
6.1(2)I1(1) 0.2170
6.1(2)I1(1) 0.2170
Possible Cause
BPDU only sends on a single link of
a port channel. If a BA dispute is
detected, the entire vPC will be in
the blocking state.
1
1 Disabled
1 Enabled
1 Normal
1 Enabled
- 1-10,15-20,30,37,99
Model
N9K-C9508-FM
N9K-C9508-FM
N9K-C9508-FM
N9K-SUP-A
N9K-SC-A
N9K-SC-A
Troubleshooting vPCs
Disabled
Enabled
Normal
Enabled
1-10,15-20,30,37,99
Solution
Use the show modulecommand to
determine the hardware version of each
Ethernet module.
Status
ok
ok
ok
active *
active
standby
Solution
Do not enable BA on the vPC.