HP Cisco Nexus 5000 Cisco NX-OS System Messages Reference (OL-15994-03, July 2 - Page 660

STP Messages Chapter 2 System Messages and Recovery Procedures Send document comments to [email protected] Error Message STP-2-RECV_BAD_TLV: Received SSTP BPDU with bad TLV on [chars] [chars]. Explanation The list interface received a SSTP BPDU that was missing the VLAN ID tag. The BPDU is discarded. Recommended Action No action is required. Error Message STP-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id [dec] on [chars] [chars]. Explanation The listed interface received a SSTP BPDU that is tagged with a VLAN ID that does not match the VLAN ID on which the BPDU was received. This occurs when the native VLAN is not consistently configured on both ends of a 802.1Q trunk. 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-ROOTGUARD_BLOCK: Root guard blocking port [chars] on [chars]. Explanation A BPDU was received on the listed interface which advertizes a superior spanning tree root bridge to that currently in use. The interface is put into blocking state and marked as root guard inconsistent in order to prevent a suboptimal spanning tree topology to form. Recommended Action Issue the show spanning-tree inconsistentports command to review the list of interfaces with root guard inconsistencies. Determine why devices connected to the listed ports are sending BPDUs with a superior root bridge and take action to prevent further occurrences. Once the bogus BPDUs have been stopped, the interfaces will automatically recover and resume normal operation. Make sure that it is appropriate to have root guard enabled on the interface. Error Message STP-2-ROOTGUARD_CONFIG_CHANGE: Root guard [chars] on port [chars]. Explanation The spanning tree root guard configuration for the listed interface has been changed. If enabled, any BPDU received on this interface which advertizes a superior spanning tree root bridge to that already in use will cause the interface to be put into blocking state and marked as root guard inconsistent. Recommended Action Verify that this is the desired configuration for the listed interface. Correct it if this is not the desired configuration otherwise no further action is required. Error Message STP-2-ROOTGUARD_UNBLOCK: Root guard unblocking port [chars] on [chars]. Explanation The listed interface is no longer receiving BPDUs advertising a superior root bridge. The root guard inconsistency is cleared for the interface and then it is taken out of the blocking state if appropriate. Recommended Action No user action is required. 2-622 Cisco NX-OS System Messages Reference OL-15994-03