Specifications

show spanning-tree
223
detail
Displays detailed information about Spanning Tree Protocols.
Operation when this parameter is omitted:
Displays Spanning Tree information.
active
Displays port information for only those ports in the Up status.
Operation when this parameter is omitted:
Displays information for all ports.
Operation when all parameters are omitted:
Displays Spanning Tree information for Single Spanning Tree, PVST+ Spanning
Tree Protocols, and Multiple Spanning Tree.
Example 1
Figure 17-1 Example of displaying PVST+ Spanning Tree information
> show spanning-tree vlan 1-4094
Date 2008/11/14 11:22:22 UTC
VLAN 1 PVST+ Spanning Tree:Enabled Mode:PVST+
Bridge ID Priority: 32769 MAC Address: 00ed.f010.0001
Bridge Status: Designated
Root Bridge ID Priority: 32769 MAC Address: 0012.e2c4.2772
Root Cost: 19
Root Port: 0/24
Port Information
0/14 Down Status:Disabled Role:- PortFast
0/16 Down Status:Disabled Role:- PortFast
0/23 Down Status:Disabled Role:- -
0/24 Up Status:Forwarding Role:Root -
0/25 Down Status:Disabled Role:- LoopGuard
0/26 Down Status:Disabled Role:- LoopGuard
VLAN 2 PVST+ Spanning Tree:Enabled Mode:PVST+
Bridge ID Priority: 32770 MAC Address: 00ed.f010.0001
Bridge Status: Designated
Root Bridge ID Priority: 32770 MAC Address: 0012.e2c4.2772
Root Cost: 19
Root Port: 0/12
Port Information
0/1 Up Status:Blocking Role:Designated RootGuard
0/2 Down Status:Disabled Role:- RootGuard
0/3 Down Status:Disabled Role:- -
0/4 Down Status:Disabled Role:- -
0/5 Down Status:Disabled Role:- -
0/6 Down Status:Disabled Role:- -
0/7 Down Status:Disabled Role:- RootGuard
0/8 Down Status:Disabled Role:- RootGuard
0/11 Down Status:Disabled Role:- LoopGuard
0/12 Up Status:Forwarding Role:Root LoopGuard
ChGr:1 Up Status:Blocking Role:Designated RootGuard
VLAN 4094 PVST+ Spanning Tree:Enabled Mode:PVST+
Bridge ID Priority: 36862 MAC Address: 00ed.f010.0001
Bridge Status: Designated
Root Bridge ID Priority: 36862 MAC Address: 0012.e2c4.2772
Root Cost: 19
Root Port: 0/20
Port Information
0/17 Down Status:Disabled Role:- LoopGuard
0/18 Down Status:Disabled Role:- LoopGuard
0/19 Down Status:Disabled Role:- LoopGuard