10.1 RSTP
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1.SW1配置RSTP
[SW1]stp mode rstp
[SW1]stp root primary
[SW1]stp enable
2.SW2配置RSTP
[SW2]stp mode rstp
[SW2]stp root secondary
[SW2]stp enable
3.SW3配置RSTP
[SW3]stp mode rstp
[SW3]stp root secondary
[SW3]stp enable
4.SW4配置RSTP
[SW4]stp mode rstp
[SW4]stp root secondary
[SW4]stp enable
5.SW4查看STP信息
[SW4]display stp brief
MSTID Port Role STP State Protection
0 GigabitEthernet0/0/23 ROOT FORWARDING NONE
0 GigabitEthernet0/0/24 ALTE DISCARDING NONE
6.修改SW4 G0/0/23的COST值,使 G0/0/23为DISCARDING状态
[SW4]interface GigabitEthernet 0/0/23
[SW4-GigabitEthernet0/0/23]stp cost 100000
SW4]display stp brief
MSTID Port Role STP State Protection
0 GigabitEthernet0/0/23 ALTE DISCARDING NONE
0 GigabitEthernet0/0/24 ROOT FORWARDING NONE
[SW4]display stp interface GigabitEthernet 0/0/23
----[Port23(GigabitEthernet0/0/23)][DISCARDING]----
Port Protocol :Enabled
Port Role :Alternate Port
Port Priority :128
Port Cost(Dot1T ) :Config=100000 / Active=100000
Designated Bridge/Port :4096.4c1f-cc63-7b40 / 128.23
Port Edged :Config=default / Active=disabled
Point-to-point :Config=auto / Active=true
Transit Limit :147 packets/hello-time
Protection Type :None
Port STP Mode :RSTP
Port Protocol Type :Config=auto / Active=dot1s
BPDU Encapsulation :Config=stp / Active=stp
PortTimes :Hello 2s MaxAge 20s FwDly 15s RemHop 0
TC or TCN send :1
TC or TCN received :2
BPDU Sent :3
TCN: 0, Config: 0, RST: 3, MST: 0
BPDU Received :206
TCN: 0, Config: 0, RST: 206, MST: 0
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