27.5.2　PVST+の状態の確認

PVST+の情報はshow spanning-treeコマンドの実行結果で示されます。ModeでPVST+，Rapid PVST+の動作モードを確認できます。トポロジーが正しく構築されていることを確認するためには，Root Bridge IDの内容が正しいこと，Port InformationのStatus，Roleが正しいことを確認してください。

図27‒8　show spanning-treeコマンドの実行結果
> show spanning-tree vlan 1 Date 20XX/09/04 11:39:43 UTC VLAN 1 PVST+ Spanning Tree:Enabled Mode:PVST+ Bridge ID Priority:32769 MAC Address:0012.e205.0900 Bridge Status:Designated Root Bridge ID Priority:32769 MAC Address:0012.e201.0900 Root Cost:1000 Root Port:1/0/1 Port Information 1/0/1 Up Status:Forwarding Role:Root 1/0/2 Up Status:Forwarding Role:Designated 1/0/3 Up Status:Blocking Role:Alternate 1/0/4 Down Status:Disabled Role:- 1/0/10 Up Status:Forwarding Role:Designated PortFast 1/0/11 Up Status:Forwarding Role:Designated PortFast 1/0/12 Up Status:Forwarding Role:Designated PortFast >

図27‒8　show spanning-treeコマンドの実行結果

> show spanning-tree vlan 1
Date 20XX/09/04 11:39:43 UTC
VLAN 1              PVST+ Spanning Tree:Enabled  Mode:PVST+
  Bridge ID        Priority:32769       MAC Address:0012.e205.0900
    Bridge Status:Designated
  Root Bridge ID   Priority:32769       MAC Address:0012.e201.0900
    Root Cost:1000
    Root Port:1/0/1
  Port Information
    1/0/1      Up    Status:Forwarding  Role:Root                 
    1/0/2      Up    Status:Forwarding  Role:Designated           
    1/0/3      Up    Status:Blocking    Role:Alternate            
    1/0/4      Down  Status:Disabled    Role:-                    
    1/0/10     Up    Status:Forwarding  Role:Designated PortFast  
    1/0/11     Up    Status:Forwarding  Role:Designated PortFast  
    1/0/12     Up    Status:Forwarding  Role:Designated PortFast  
>

27.5.2 PVST+の状態の確認

27.5.2　PVST+の状態の確認