分类：
2012-02-07 20:43:51
可以使用一系列show命令来验证你上面的配置是否正确。建议每次改变配置后都进行这些验证，以便及时发现问题。
下面先来验证Distribution 1已作为了VLANs 10、3、100这三个VLAN的根交换机，然后验证网络中各条转发路径是否满足你的要求（主要检查各VLAN中的各端口转发状态，参见输出信息中的粗体字部分）。
Distribution 1#show spanning-tree vlan 10
VLAN0010
Spanning tree enabled protocol rstp
Root ID Priority 24586
Address 0015.63f6.b700
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 24586 (priority 24576 sys-id-ext 10)
Address 0015.63f6.b700
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa1/0/1 Desg FWD 19 128.1 P2p
Fa1/0/3 Desg FWD 19 128.3 P2p
Fa1/0/5 Desg FWD 19 128.5 P2p
Fa1/0/23 Desg FWD 19 128.23 P2p
Fa1/0/24 Desg FWD 19 128.24 P2p
Access 1#show spanning-tree summary
Switch is in rapid-pvst mode
Root bridge for: none
Extended system ID is enabled
Portfast Default is disabled
PortFast BPDU Guard Default is enabled
Portfast BPDU Filter Default is disabled
Loopguard Default is disabled
EtherChannel misconfig guard is enabled
UplinkFast is disabled
BackboneFast is disabled
Configured Pathcost method used is short
Name Blocking Listening Learning Forwarding STP Active
---------------------- -------- --------- -------- ---------- ----------
VLAN0010 1 0 0 1 2
VLAN0020 1 0 0 1 2
---------------------- -------- --------- -------- ---------- ----------
2 vlans 2 0 0 2 4
Access 2> (enable) show spantree 30
VLAN 30
Spanning tree mode RAPID-PVST+
Spanning tree type ieee
Spanning tree enabled
Designated Root 00-15-63-f6-b7-00
Designated Root Priority 24606
Designated Root Cost 19
Designated Root Port 3/3
Root Max Age 20 sec Hello Time 2 sec Forward Delay 15 sec
Bridge ID MAC ADDR 00-d0-00-50-30-1d
Bridge ID Priority 32768
Bridge Max Age 20 sec Hello Time 2 sec Forward Delay 15 sec
Port State Role Cost Prio Type
------------------------ ------------- ---- --------- ---- --------------------
3/3 forwarding ROOT 19 32 P2P
3/4 blocking ALTR 19 32 P2P
Access 2> (enable) show spantree 40
VLAN 40
Spanning tree mode RAPID-PVST+
Spanning tree type ieee
Spanning tree enabled
Designated Root 00-15-c6-c1-30-00
Designated Root Priority 24616
Designated Root Cost 19
Designated Root Port 3/4
Root Max Age 20 sec Hello Time 2 sec Forward Delay 15 sec
Bridge ID MAC ADDR 00-d0-00-50-30-27
Bridge ID Priority 32768
Bridge Max Age 20 sec Hello Time 2 sec Forward Delay 15 sec
Port State Role Cost Prio Type
------------------------ ------------- ---- --------- ---- --------------------
3/3 blocking ALTR 19 32 P2P
3/4 forwarding ROOT 19 32 P2P
Services 1#show spanning-tree vlan 100
VLAN0100
Spanning tree enabled protocol rstp
Root ID Priority 24676
Address 0015.63f6.b700
Cost 18
Port 7 (FastEthernet0/5)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32868 (priority 32768 sys-id-ext 100)
Address 0003.fd63.bb80
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/5 Root FWD 18 128.7 P2p
Fa0/46 Desg FWD 19 128.50 P2p
Fa0/47 Desg FWD 19 128.51 P2p
Services 1#show spanning-tree vlan 200
VLAN0200
Spanning tree enabled protocol rstp
Root ID Priority 24776
Address 0015.c6c1.3000
Cost 37
Port 51 (FastEthernet0/47)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32968 (priority 32768 sys-id-ext 200)
Address 0003.fd63.bb80
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/5 Altn BLK 19 128.7 P2p
Fa0/46 Altn BLK 19 128.50 P2p
Fa0/47 Root FWD 19 128.51 P2p
Services 2#show spanning-tree vlan 100
VLAN0100
Spanning tree enabled protocol rstp
Root ID Priority 24676
Address 0015.63f6.b700
Cost 37
Port 42 (GigabitEthernet0/42)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32868 (priority 32768 sys-id-ext 100)
Address 00d0.2bfc.7d80
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/6 Altn BLK 19 128.6 P2p
Fa0/42 Root FWD 19 128.42 P2p
Fa0/43 Altn BLK 19 128.43 P2p
Services 2#show spanning-tree vlan 200
VLAN0200
Spanning tree enabled protocol rstp
Root ID Priority 24776
Address 0015.c6c1.3000
Cost 18
Port 6 (GigabitEthernet0/6)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32968 (priority 32768 sys-id-ext 200)
Address 00d0.2bfc.7d80
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/6 Root FWD 18 128.6 P2p
Fa0/42 Desg FWD 19 128.42 P2p
Fa0/43 Desg FWD 19 64.43 P2p
