标签:b2c run 连接 cost vlan ima OLE png role
一、实验拓扑:三、命令部署:
1、IOU1、IOU2、IOU3部署MST
IOU1(config)#spanning-tree mode mst
IOU2(config)#spanning-tree mode mst
IOU3(config)#spanning-tree mode mst
四、验证:
1、IOU1、IOU2、IOU3未部署MST之前:
IOU3#show spanning-tree vlan 10
Interface Role Sts Cost Prio.Nbr Type
Et0/0 Root FWD 100 128.1 Shr
Et0/1 Altn BLK 100 128.2 Shr
2、SW1、SW2、SW3部署MST之后:
IOU3#show spanning-tree vlan 10
Interface Role Sts Cost Prio.Nbr Type
Et0/0 Root FWD 2000000 128.1 Shr
Et0/1 Altn BLK 2000000 128.2 Shr
3、IOU3的上行链路 e0/0 shutdown:可以看到e0/1秒变FWD
IOU3#show spanning-tree vlan 10
Interface Role Sts Cost Prio.Nbr Type
Et0/1 Root FWD 2000000 128.2 Shr
4、IOU3的 e0/0再no shutdown:可以看到e0/0秒变回FWD,e0/1继续成为BLK
IOU3#show spanning-tree vlan 10
Interface Role Sts Cost Prio.Nbr Type
Et0/0 Root FWD 2000000 128.1 Shr
Et0/1 Altn BLK 2000000 128.2 Shr
5、骨干链路IOU2的e0/0 shutdown:经历BLK(15S)——>LRN(15s)——FWD(时间总长为30s)
Interface Role Sts Cost Prio.Nbr Type
Et0/0 Root FWD 2000000 128.1 Shr
Et0/1 Desg BLK 2000000 128.2 Shr
Interface Role Sts Cost Prio.Nbr Type
Et0/0 Root FWD 2000000 128.1 Shr
Et0/1 Desg LRN 2000000 128.2 Shr
Interface Role Sts Cost Prio.Nbr Type
Et0/0 Root FWD 2000000 128.1 Shr
Et0/1 Desg FWD 2000000 128.2 Shr
标签:b2c run 连接 cost vlan ima OLE png role
原文地址:http://blog.51cto.com/13856092/2137253