RSTP（Rapid PVST+）の設定例②（その2）

RSTP（Rapid PVST+）の設定例②（その2）

ここからは、Rapid PVST+ の設定を行っていきます。

●S_Aの Rapid PVST+設定

S_A(config)#spanning-tree mode rapid-pvst

●S_Bの Rapid PVST+設定

S_B(config)#spanning-tree mode rapid-pvst

●S_Aでスパニングツリーのポートの確認をします。

S_A#show spanning-tree

S_Aの「show spanning-tree」コマンドの出力

S_A#show spanning-tree 
VLAN0001
  Spanning tree enabled protocol rstp
  Root ID    Priority    32769
             Address     0005.5EA2.DC98
             This bridge is the root
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)
             Address     0005.5EA2.DC98
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time  20

Interface        Role Sts Cost      Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/3            Desg FWD 19        128.3    P2p
Fa0/2            Desg FWD 19        128.2    P2p

VLAN0010
  Spanning tree enabled protocol rstp
  Root ID    Priority    32778
             Address     0005.5EA2.DC98
             This bridge is the root
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32778  (priority 32768 sys-id-ext 10)
             Address     0005.5EA2.DC98
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time  20

Interface        Role Sts Cost      Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/3            Desg FWD 19        128.3    P2p
Fa0/4            Desg FWD 19        128.4    P2p
Fa0/2            Desg FWD 19        128.2    P2p

VLAN0020
  Spanning tree enabled protocol rstp
  Root ID    Priority    32788
             Address     0005.5EA2.DC98
             This bridge is the root
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32788  (priority 32768 sys-id-ext 20)
             Address     0005.5EA2.DC98
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time  20

Interface        Role Sts Cost      Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/3            Desg FWD 19        128.3    P2p
Fa0/5            Desg FWD 19        128.5    P2p
Fa0/2            Desg FWD 19        128.2    P2p

黄色のマークと水色のマーカーからVLANごとに、RSTP（Rapid PVST+）が有効になっていることが確認できます。

●S_Bでスパニングツリーのポートの確認をします。

S_B#show spanning-tree

●S_Bの「show spanning-tree」コマンドの出力

S_B#show spanning-tree 
VLAN0001
  Spanning tree enabled protocol rstp
  Root ID    Priority    32769
             Address     0005.5EA2.DC98
             Cost        19
             Port        2(FastEthernet0/2)
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)
             Address     00E0.B044.7267
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time  20

Interface        Role Sts Cost