上一次这笔记没有在博客里发表成功,今天再试试吧。


个人理解,时间关系,写的比较乱,还请包涵。


拓扑:

 Router id的防环:RID无穷自举_防环      

提醒:这个拓扑开起来后,看到实验效果后请马上关闭,否则eNSP会死机,死机后可能出现无法预料情况,可以整个关掉eNSP,想用再打开eNSP即可

 [R1]dis stp

 Protocol Status       :Disabled            

 Protocol Standard     :IEEE 802.1s            

 Version               :3            

 CIST Bridge Priority  :32768            

 MAC address           :5489-98b8-3a86            

 Max age(s)            :20            

 Forward delay(s)      :15            

 Hello time(s)         :2            

 Max hops              :20

路由器上STP生成树默认关闭

关键配置:

 

[R1]dis cur

#

sysname R1

#

router id 91.1.1.1

#

vlan batch 123

#

interface Vlanif123

 ip address 123.1.1.1 255.255.255.0

#

interface GigabitEthernet0/0/0

 portswitch

 shutdown

 port hybrid pvid vlan 123

 undo port hybrid vlan 1

 port hybrid untagged vlan 123

#

interface GigabitEthernet0/0/1

 portswitch

 shutdown

 port hybrid pvid vlan 123               

 undo port hybrid vlan 1

 port hybrid untagged vlan 123

#

ospf 10

 area 0.0.0.0

 network 123.1.1.1 0.0.0.0

#

 

 

[R2]dis cur

#

sysname R2

#

router id 92.2.2.2

#

vlan batch 123

#

interface Vlanif123

 ip address 123.1.1.2 255.255.255.0

#

interface GigabitEthernet0/0/1

 portswitch

 port hybrid pvid vlan 123

 undo port hybrid vlan 1

 port hybrid untagged vlan 123

这里有个小窍门:如果要更改为access接口会提示错误:renew configuration,这是希望你把接口下所有相关hybrid配置全部删除后再次配置接口

#

interface GigabitEthernet0/0/2

 portswitch

 port hybrid pvid vlan 123               

 undo port hybrid vlan 1

 port hybrid untagged vlan 123

#

ospf 10

 area 0.0.0.0

 network 123.1.1.2 0.0.0.0

#

 

 

[R3]dis cur

#

sysname R3

#

router id 93.3.3.3

#

vlan batch 123

#

interface Vlanif123

 ip address 123.1.1.3 255.255.255.0

#

interface GigabitEthernet0/0/0

 portswitch

 port hybrid pvid vlan 123

 undo port hybrid vlan 1

 port hybrid untagged vlan 123

#

interface GigabitEthernet0/0/2

 portswitch

 port hybrid pvid vlan 123               

 undo port hybrid vlan 1

 port hybrid untagged vlan 123

#

ospf 10

 area 0.0.0.0

 network 123.1.1.3 0.0.0.0

#

实验结果建议用:display ospf error查看router id confusion结果

 

这个实验说明RID也具备防环功能,原因是二层打破了hello只有一跳的限制,自己收到自己的hello报文从而报错,说明出现环路