PC1及PC2的PVID分别为8,9;SW2的g0/0/2口的PVID为10;通过设置Hybrid的Tag list及Untag list来实现R1分别与PC1和PC2通信,但PC1与PC2之间不能通信;(抓包验证来回流量所携带的Tag).
拓扑:
R1配置:
<Huawei>sy
Enter system view, return user view with Ctrl+Z.
[Huawei]sy R1
[R1]int g0/0/0
[R1-GigabitEthernet0/0/0]ip address 10.1.10.3 24
SW1配置:
<Huawei>sy
Enter system view, return user view with Ctrl+Z.
[Huawei]sy SW1
[SW1]v b 8 to 10 //创建vlan 8 9 10
Info: This operation may take a few seconds. Please wait for a moment...done.
[SW1]int g0/0/1
[SW1-GigabitEthernet0/0/1]p l h
[SW1-GigabitEthernet0/0/1]p h p v 8 //创建pvid 8
[SW1-GigabitEthernet0/0/1]p h u v 8 10 //0/0/1端口剥离tag 8和10
[SW1-GigabitEthernet0/0/1]int g
0/0/2
[SW1-GigabitEthernet0/0/2]p h p v 9 //创建pvid 9
[SW1-GigabitEthernet0/0/2]p h u v 9 10 //0/0/2端口剥离tag 9和10
[SW1-GigabitEthernet0/0/2]int g0/0/3
[SW1-GigabitEthernet0/0/3]p h t v 8 to 10 //和SW2发送数据时打上tag 8 9 10
SW2配置:
<Huawei>
<Huawei>sy
Enter system view, return user view with Ctrl+Z.
[Huawei]sy SW2
[SW2]v b 8 to 10 //创建vlan 8 9 10
Info: This operation may take a few seconds. Please wait for a moment...done.
[SW2]
int g0/0/1
[SW2-GigabitEthernet0/0/1]p h t v 8 to 10 //接受数据时打上tag 8 9 10
[SW2-GigabitEthernet0/0/1]int g0/0/2
[SW2-GigabitEthernet0/0/2]p h p v 10 //创建pvid 10
[SW2-GigabitEthernet0/0/2]p h u v
8 to 10 //R1接受和发送数据时剥离tag 8 9 10
PC1与R1/PC2通信:
PC2与R1通信:
抓取报文:
分析:PC1发送数据到达SW1时,PVID为8,而R1回复时,PVID为10,所以剥离的tag为8和10,PC2同理,PVID为9,所以剥离的tag为9和10;SW1和SW2之间连接是trunk模式,经过的数据需要打上tag,查看tag列表时,存在对应的tag并转发数据,当数据发送到R1上时,则需剥离掉tag8、9、10,所以PC1/PC2可以与R1通信,而PC1与PC2之间没有相应的Untag列表,则无法进行通信.
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