生成树的详细配置及实验(3)

Fa0/21 Desg FWD 200000 128.21 P2p Pre-STD-Rx Po2 Desg FWD 100000 128.65 P2p MST2

Spanning tree enabled protocol mstp Root ID Priority 8194

Address 0013.80e2.4880 This bridge is the root

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 8194 (priority 8192 sys-id-ext 2) Address 0013.80e2.4880

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Interface Role Sts Cost Prio.Nbr Type

---------------- ---- --- --------- -------- -------------------------------- Fa0/21 Desg FWD 200000 128.21 P2p Pre-STD-Rx Po2 Desg FWD 100000 128.65 P2p

23. 配置ED-SW BPDU Guard

ed-sw(config-if)#int f0/24

ed-sw(config-if)#spanning-tree bpduguard enable ed-sw(config-if)#

02:51:16: %SPANTREE-2-BLOCK_BPDUGUARD: Received BPDU on port FastEthernet0/24 with BPDU Guard enabled. Disabling port. //端口启用此功能后，收到任何BPDU信息，则此端口进入

err-disable状态

02:51:16: %PM-4-ERR_DISABLE: bpduguard error detected on Fa0/24, putting Fa0/24 in err-disable state

02:51:17: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/24, changed state to down

24. 配置ED-SW F0/24端口，启用Guard Root功能

ed-sw(config-if)#spanning-tree guard root

02:54:56: %SPANTREE-2-ROOTGUARD_CONFIG_CHANGE: Root guard enabled on port FastEthernet0/24. 02:54:56: %SPANTREE-2-ROOTGUARD_BLOCK: Root guard blocking port FastEthernet0/24 on MST00. //启用此功能后， 如果

F0/24端口接入了>=目前根交换机生成树优先级的交换

机，则Block此端口

25. 验证ED-SW的STP状态

ed-sw#sh spanning-tree MST00

Spanning tree enabled protocol mstp Root ID Priority 32768

Address 000d.65dc.8800 Cost 0

Port 23 (FastEthernet0/23)

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 32768 (priority 32768 sys-id-ext 0) Address 000d.bdbb.7480

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Interface Role Sts Cost Prio.Nbr Type

---------------- ---- --- --------- -------- -------------------------------- Fa0/2 Desg FWD 200000 128.2 Edge P2p Fa0/4 Desg FWD 200000 128.4 P2p Fa0/23 Root FWD 200000 128.23 P2p

Fa0/24 Desg BKN*200000 128.24 P2p *ROOT_Inc // F0/24收到了相同优先级

BPDU，则阻塞此端口，并提示根不一致信息

MST01

Spanning tree enabled protocol mstp Root ID Priority 16385

Address 0013.80e2.4880 Cost 300000

Port 23 (FastEthernet0/23)

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 32769 (priority 32768 sys-id-ext 1) Address 000d.bdbb.7480

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Interface Role Sts Cost Prio.Nbr Type

---------------- ---- --- --------- -------- -------------------------------- Fa0/2 Desg FWD 200000 128.2 Edge P2p Fa0/4 Desg LRN 200000 128.4 P2p Fa0/23 Root FWD 200000 128.23 P2p

Fa0/24 Desg BKN*200000 128.24 P2p *ROOT_Inc

26. 配置Core1与Core2互联的接口启用udld功能

Core1，Core2:

interface range F0/23 - 24 udld port

27. 验证udld配置

Core1#sh udld f0/23

Interface Fa0/23 ---

Port enable administrative configuration setting: Enabled //配置启用 Port enable operational state: Enabled //已经正常运行 Current bidirectional state: Bidirectional //双向学到对等体， Current operational state: Advertisement - Single neighbor detected //检测到一个邻居 Message interval: 7 Time out interval: 5

Entry 1 ---

Expiration time: 41 Cache Device index: 1

Current neighbor state: Bidirectional Device ID: CAT0912R1HW Port ID: Fa0/23

Neighbor echo 1 device: CAT0730X1HN Neighbor echo 1 port: Fa0/23

Message interval: 15 Time out interval: 5 CDP Device name: Core2

28. 实验完成

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