HP Cisco Nexus 5000 Cisco NX-OS System Messages Reference (OL-15994-03, July 2 - Page 658

STP Messages Chapter 2 System Messages and Recovery Procedures Send document comments to [email protected] Error Message STP-2-DISPUTE_CLEARED: Dispute resolved for port [chars] on [chars]. Explanation The listed interface has stopped receiving Inferior BPDUs with designated role and state as learning and/or forwarding. The Dispute has been resolved and if the port is still designated, it will be taken out of the blocking state as and when appropriate. Recommended Action No user action is required. Error Message STP-2-DISPUTE_DETECTED: Dispute detected on port [chars] on [chars]. Explanation The spanning tree has detected a Dispute on this interface. The BPDU received from the peer is Inferior with designated role and state as learning and/or forwarding. Since this condition could be caused by an unidirectional link failure, the interface is put into blocking state and marked as disputed in order to prevent possible loops from being created. Recommended Action Issue the show spanning-tree inconsistentports command to review the list of interfaces with Dispute. Dispute is caused if the peer is not receiving the Superior BPDUs sent by this interface. That is why the peer continues to send its own Inferior BPDUs. Determine why devices connected to the listed ports are not receiving BPDUs. One reason could be a failure in the cable: if the link has a failure that makes it unidirectional (you cannot transmit but you can receive) it should be replaced with a proper cable. Error Message STP-2-IPC_PROCESSING_ERR: Error in processing IPC message : Opcode = [dec], Error code = [hex] Explanation STP has detected an error in processing an MTS message. The error and message are specified in the error message. Recommended Action No action is required. Error Message STP-2-LOOPGUARD_BLOCK: Loop guard blocking port [chars] on [chars]. Explanation The spanning tree message age timer has expired because no BPDUs were received from the designated bridge. Since this condition could be caused by an unidirectional link failure, the interface is put into blocking state and marked as loop guard inconsistent in order to prevent possible loops from being created. Recommended Action Issue the show spanning-tree inconsistentports command to review the list of interfaces with loop guard inconsistencies. Determine why devices connected to the listed ports are not sending BPDUs. One reason could be that they do not run the spanning tree protocol; in this case you should disable loopguard in the inconsistent interface/s or start the spanning tree protocol on the other side of the links depending on the context. Another reason could be a failure in the cable: if the link has a failure that makes it unidirectional (you can transmit but you cannot receive) it should be replaced with a proper cable. 2-620 Cisco NX-OS System Messages Reference OL-15994-03