HP 6120G/XG HP ProCurve Series 6120 Blade Switches Advanced Traffic Management - Page 167

Multiple Instance Spanning-Tree Operation Troubleshooting an MSTP Configuration Field Exceeded Max Hops MSTI MSGs Topology Changes Detected Topology Changes Tx Topology Changes Rx Topology Change ACKs Tx Topology Change ACKs Rx TCN BPDUs Tx TCN BPDUs Rx CFG BPDUs Tx CFG BPDUs Rx Description Number of times that an MSTI MSG packet is received from a bridge internal to the MST region with an MSTI Remaining Hops value less than or equal to 1. This may occur if the receiving bridge is located too far from the MSTI regional root bridge (beyond the configured size of the MST region on the MSTI regional root bridge) or if a BPDU packet with invalid MSTI regional root bridge information is continuously circulating between bridges in an MST region and needs to be aged out. This counter is maintained on a perMSTI per-port basis. Number of times that a Topology Change event is detected by the CIST or MSTI port 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-CIST per-port and on a per-MSTI per-port basis. Number of times that Topology Change information is propagated (sent out) through the port to the rest of the network. For a CIST port, the counter is the number of times that a CFG, RST or MST BPDU with the TC flag set is transmitted out of the port. For an MSTI port, the counter is the number of times that a MSTI configuration message with the TC flag set is transmitted out of the port. This counter is maintained on a per-CIST per-port and on a per-MSTI per-port bases. Number of times that Topology Change information is received from the peer port. For a CIST port, the counter is the number of times that a CFG, RST or MST BPDU with the TC flag set is received. For an MSTI port, the counter is the number of times that an MSTI configuration message with the TC flag set is received. This counter is maintained on a per-CIST per-port and on a per-MSTI per-port basis. Number of times that the Topology Change acknowledgement is transmitted through the port (number of CFG, RST or MST BPDUs transmitted with the Topology Change Acknowledge flag set). This counter is maintained by the CIST (default MST instance 0) on a per-port basis. Number of times the Topology Change acknowledgement is received on the port (number of CFG, RST or MST BPDUs received with the Topology Change Acknowledge flag set). This counter is maintained by the CIST (default MST instance 0) on a per-port basis. Number of Topology Change Notification BPDUs that are transmitted through the port. This counter is maintained by the CIST (default MST instance 0) on a per-port basis. Number of Topology Change Notification BPDUs that are received on the port. This counter is maintained by the CIST (default MST instance 0) on a per-port basis. Number of (802.1D) Configuration BPDUs that are transmitted through the port. This counter is maintained by the CIST (default MST instance 0) on a per-port basis. Number of (802.1D) Configuration BPDUs that are received on the port. This counter maintained by the CIST (default MST instance 0) on a per-port basis. 4-68