Displaying RSTP (IEEE 802.1w) Information
To show a summary of RSTP (IEEE 802.1w)
information, enter the show
802-1w command.
device# show 802-1w
--- VLAN 1 [ STP Instance owned by VLAN 1 ] ----------------------------
VLAN 1 BPDU cam_index is 2 and the IGC and DMA master Are(HEX) 0 1 2 3
Bridge IEEE 802.1W Parameters:
Bridge Bridge Bridge Bridge Force tx
Identifier MaxAge Hello FwdDly Version Hold
hex sec sec sec cnt
800000e080541700 20 2 15 Default 3
RootBridge RootPath DesignatedBri- Root Max Fwd Hel
Identifier Cost dge Identifier Port Age Dly lo
hex hex sec sec sec
800000e0804c9c00 200000 800000e0804c9c00 1 20 15 2
Port IEEE 802.1W Parameters:
<--- Config Params -->|<-------------- Current state ----------------->
Port Pri PortPath P2P Edge Role State Designa- Designated
Num Cost Mac Port ted cost bridge
1/1/1 128 200000 F F ROOT FORWARDING 0 800000e0804c9c00
1/1/2 128 200000 F F DESIGNATED FORWARDING 200000 800000e080541700
1/1/3 128 200000 F F DESIGNATED FORWARDING 200000 800000e080541700
1/1/4 128 200000 F F BACKUP DISCARDING 200000 800000e080541700
To display detailed information about RSTP (IEEE
802.1w), enter the show 802-1w
detail command.
device# show 802-1w detail
======================================================================
VLAN 1 - SPANNING TREE (IEEE 802.1W) ACTIVE
======================================================================
BridgeId 800000a0c9c002a0, forceVersion 2, txHoldCount 3
Number of topology changes: 53
Last topology change occured 13 minute(s) 30 second(s) ago on lg40
Port 1/1/1 - Role: DESIGNATED - State: FORWARDING
PathCost 20000, Priority 128, AdminOperEdge F, AdminPt2PtMac F
DesignatedPriority - Root: 0x800000a0c9c002a0, Bridge: 0x800000a0c9c002a0
ActiveTimers - helloWhen 0
MachineStates - PIM: CURRENT, PRT: DESIGNATED_PORT, PST: FORWARDING
TCM: ACTIVE, PPM: SENDING_RSTP, PTX: TRANSMIT_IDLE
Received - RST BPDUs 0, Config BPDUs 0, TCN BPDUs 0