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RSTP与MSTP的配置实例与演示-EI CCNP学习考试技术文档

发布日期:2022-04-05 浏览次数:2783 来源:杨广成

RSTP与MSTP的配置实例与演示-EI CCNP学习考试技术文档

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1.      配置sw2成为vlan 1Root

SW2

spanning-tree vlan 1 root primary

2.      sw3上开启debug spanning-tree events,将sw3F0/23接口shutdown。观察F0/13接口的状态。

SW3

interface f0/23

 shutdown

 

02:04:47: STP: VLAN0001 Fa0/13 -> listening

 

02:05:02: STP: VLAN0001 Fa0/13 -> learning

 

02:05:17: STP: VLAN0001 Fa0/13 -> forwarding   //此接口从Block状态到RP forwarding状态需要30s

 

SW3#show spanning-tree vlan 1

VLAN0001

             Aging Time 300

 

Interface        Role Sts Cost      Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Fa0/13           Root FWD 19        128.13   P2p

4.      sw1F0/1接口开启端口加速,将F0/1接口shutdown,然后再no shutdown,观察F0/1接口的状态。

SW1

interface FastEthernet0/1

spanning-tree portfast

shutdown

no shutdown

 

02:21:21: set portid: VLAN0001 Fa0/1: new port id 8001

02:21:21: STP: VLAN0001 Fa0/1 ->jump to forwarding from blocking  //直接跳转到forwarding状态

6.      sw1 sw2 sw3上开启backbonefast特性。将sw1F0/11-12接口shutdown。在sw3上观察F0/13接口的状态。

SW1 SW2 SW3

spanning-tree backbonefast

02:33:09: STP: VLAN0001 heard root 28673-000b.5f01.4380 on Fa0/13 

 

//收到次级BPDU,会向Root发出RLQ的请求,收到Root回复的RLQReply,立刻响应次级BPDU

 

02:14:28: STP: VLAN0001 Fa0/13 -> listening

 

02:14:43: STP: VLAN0001 Fa0/13 -> learning

 

02:14:58: STP: VLAN0001 Fa0/13 -> forwarding   //此接口从Block状态到DP forwarding状态需要30s

Fa0/13           Desg FWD 19        128.13   P2p

8.      sw1 sw2 sw3上,创建vlan 2-7,将vlan2-4划入instance 1,将vlan 5-7划入instance 2,将生成树类型配置为mst

SW1 SW2 SW3

vlan 2-7

 

spanning-tree mst configuration

 name WOLF

 revision 10

 instance 1 vlan 2-4

 instance 2 vlan 5-7

 

spanning-tree mode mst

 

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