BROCADE IP PRIMER

IEEE 802.1s (MST)Port IEEE 802.1W Parameters:|Port Pri PortPath P2P Edge Role State Designa- DesignatedNum Cost Mac Port ted cost bridge7 128 20000 F F DESIGNATED FORWARDING 0 8000000abc123a018 128 20000 F F DESIGNATED FORWARDING 0 8000000abc123a019 128 20000 F F DISABLED DISABLED 0 8000000abc123a01Like show spanning-tree, this command shows you the root switch (bridge) ID,timers, and the roles and states of the participating interfaces. Similar again toSTP, there is also a more detailed report:Switch#show 802-1w detail=============================================================VLAN 10 - MULTIPLE SPANNING TREE (MSTP - IEEE 802.1W) ACTIVE=============================================================BridgeId 8000000abc123a01, forceVersion 2, txHoldCount 3Port 7 - Role: DESIGNATED - State: FORWARDINGPathCost 20000, Priority 128, AdminOperEdge F, AdminPt2PtMacFDesignatedPriority - Root: 0x8000000abc123a01, Bridge:0x8000000abc123a01ActiveTimers - helloWhen 3MachineStates - PIM: CURRENT, PRT: DESIGNATED_PORT, PST:FORWARDINGTCM: ACTIVE, PPM: SENDING_RSTP, PTX:TRANSMIT_IDLEReceived - RST BPDUs 37, Config BPDUs 0, TCN BPDUs 0Port 8 - Role: DESIGNATED - State: FORWARDINGPathCost 20000, Priority 128, AdminOperEdge F, AdminPt2PtMacFDesignatedPriority - Root: 0x8000000abc123a01 , Bridge:0x8000000abc123a01ActiveTimers - helloWhen 3MachineStates - PIM: CURRENT, PRT: DESIGNATED_PORT, PST:FORWARDINGTCM: ACTIVE, PPM: SENDING_RSTP, PTX:TRANSMIT_IDLEReceived - RST BPDUs 37, Config BPDUs 0, TCN BPDUs 0Port 9 - DISABLEDNotice that this output defines whether or not a port has been defined as“admin-pt2pt-mac” or “admin-edge-port.” Also, Rapid Spanning Tree (RST)BPDUs are distinguished from regular STP BPDUs. Notice that these arelogged on the individual interfaces.IEEE 802.1s (MST)If you've been paying close attention to some of the previous show commandoutputs, you may have noticed mention of MST. It stands for Multiple SpanningTree, and it's an open standard defined in IEEE 802.1s. It is enabled by defaulton all Brocade switches running switch code.Brocade IP Primer 207