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2-619
Cisco NX-OS System Messages Reference
OL-15994-03
Chapter 2 System Messages and Recovery Procedures
STP Messages
Error Message STP-2-BLOCK_DETECTED_PVST_PEER: Blocking port [chars] [PVST peer
detected].
Explanation The listed interface received SSTP BPDU indicating that the peer is running PVST and
will be held in spanning tree blocking state until the interface stops receiving SSTP BPDUs.
Recommended Action Either enable PVST simulation configuration for the interface or make sure
the port peer is not PVST switch.
Error Message STP-2-BLOCK_PVID_LOCAL: Blocking [chars] on [chars]. Inconsistent
local vlan.
Explanation The spanning tree port associateddd with the listed spanning tree instance and interface
will be held in spanning tree blocking state until the Port VLAN ID (PVID) inconsistency is
resolved. The listed spanning tree instance is that of the native VLAN ID of the listed interface.
Recommended Action Verify that the configuration of the native VLAN ID is consistent on the
interfaces on each end of the 802.1Q trunk connection. Once corrected, spanning tree will
automatically unblock the interfaces as appropriate.
Error Message STP-2-BLOCK_PVID_PEER: Blocking [chars] on [chars]. Inconsistent peer
vlan.
Explanation The spanning tree port associateddd with the listed spanning tree instance and interface
will be held in spanning tree blocking state until the port VLAN Id (PVID) inconsistency is resolved.
The listed spanning tree instance is that of the native VLAN ID of interface on the peer switch to
which the listed interface is connected.
Recommended Action Verify that the configuration of the native VLAN ID is consistent on the
interfaces on each end of the 802.1Q trunk connection. Once corrected, spanning tree will
automatically unblock the interfaces as appropriate.
Error Message STP-2-BRIDGE_ASSURANCE_BLOCK: Bridge Assurance blocking port [chars]
[chars].
Explanation BPDUs were not received from a neighboring switch on the interface that has spanning
tree Bridge Assurance configured. As a result, the interface was moved to the spanning tree
Blocking state.
Recommended Action No user action is required.
Error Message STP-2-BRIDGE_ASSURANCE_UNBLOCK: Bridge Assurance unblocking port
[chars] [chars].
Explanation The interface listed in the message has been restoredddd to normal spanning tree state
after receiving BPDUs from the neighboring L2 switch/bridge.
Recommended Action No user action is required.
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