Field descriptions for RPVST+ debug command output
Field |
Shows the number of — |
---|---|
Invalid BPDUs |
Received BPDUs that failed standard RPVST+ (802.1Q-REV/D5.0 14.4) validation checks and were dropped. This counter is maintained on a per-port per-VLAN basis. |
Errant BPDUs |
Received BPDUs that were dropped on a port that is configured to
not expect BPDU packets. This counter is maintained on a per-port
basis and is incremented each time a BPDU is received on a port configured
with the BPDU filter to ignore incoming BPDU packets ( |
Looped-back BPDUs |
Times that a port has received self-sent BPDU packets as the result of an external loop condition in which the BPDUs were looped back to the originating transmission port. The received BPDU is still processed by RPVST+ and the port changes to a blocked state. This counter is maintained on a per-port per-VLAN basis. |
Starved BPDUs |
Times that
no BPDUs are received within the scheduled interval (three times the
Hello Time value configured with the |
Exceeded Max Age BPDUs |
Times that a BPDU packet is received from a bridge with a Message
Age value greater than the configured value of the Max Age parameter |
Topology Changes Detected |
Times that a Topology Change event is detected by the port on a given VLAN and the port triggers a topology change propagation throughout the network. A Topology Change event occurs when a non-edge port enters forwarding state. This counter is maintained on a per-VLAN per-port basis. |
Topology Changes Tx |
Times that Topology Change information is propagated (sent out) through the port to the rest of the network. For a VLAN port running PVST (non-rapid), the counter is the number of times that a CFG or RST BPDU with the TC flag set is transmitted out of the port. This counter is maintained on a per-VLAN per-port basis. |
Topology Changes Rx |
Times that Topology Change information is received from the peer port. For a VLAN port running PVST (non-rapid), the counter is the number of times that a CFG or RST BPDU with the TC flag set is received. This counter is maintained on a per-port per-VLAN basis. |
Topology Change ACKs Tx |
Times that the Topology Change acknowledgement is transmitted through the port (number of CFG or RST BPDUs transmitted with the Topology Change Acknowledge flag set). This counter is maintained on a per-port per-VLAN basis. |
Topology Change ACKs Rx |
Times that the Topology Change acknowledgement is received on the port (number of CFG or RST BPDUs received with the Topology Change Acknowledge flag set). This counter is maintained on a per-VLAN basis. |
TCN BPDUs Tx |
Topology Change Notification BPDUs that are transmitted through the port. This counter is maintained on a per-port basis. |
TCN BPDUs Rx |
Topology Change Notification BPDUs that are received on the port. This counter is maintained on a per-port per-VLAN basis. |
CFG BPDUs Tx |
802.1D configuration BPDUs that are transmitted through the port. This counter is maintained on a per-port per-VLAN basis. |
CFG BPDUs Rx |
802.1D configuration BPDUs that are received on the port. This counter maintained on a per-port per-VLAN basis. |
RST BPDUs Tx |
802.1w RST BPDUs that are transmitted through the port. This counter is maintained on a per-port per-VLAN basis. |
RST BPDUs Rx |
802.1w RST BPDUs that are received on the port. This counter is maintained on a per-port per-VLAN basis. |