Network Requirements
- Intranet users CE1 and CE2, and CE3 and CE4 communicate with each other through the carrier network. CE1 and CE2 uses the Intranet VLAN10-VLAN20, CE3 and CE4 uses Intranet VLAN15-VLAN30, and PE1 and PE2 are two edge devices in the carrier network.
- Flexible QinQ is configured on PE1 and PE2. Then, CE1 and CE2 can communicate with each other through VLAN00 of the carrier public network, CE3 and CE4 can communicate with each other through VLAN101 of the carrier public network, and the packets that are transmitted in the carrier public network contain two layers of tags.
Network Topology
Figure 4-2 Networking for Configuring Flexible QinQ
Configuration Steps
Step 1: Configure PE1.
#On PE1, create VLAN10-VLAN30 and VLAN100-VLAN101.
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PE1#configure terminal
PE1(config)#vlan 10-30,100-101
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#On PE1, configure the link type of port gigabitethernet0/1 to Trunk and allow services of VLAN10-VLAN20 and VLAN100 to pass, and set PVID to 1.
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PE1(config)#interface gigabitethernet 0/1
PE1(config-if-gigabitethernet0/1)#switchport mode trunk
PE1(config-if-gigabitethernet0/1)#switchport trunk allowed vlan add 10-20,100
PE1(config-if-gigabitethernet0/1)#switchport trunk pvid vlan 1
PE1(config-if-gigabitethernet0/1)#exit
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#On PE1, configure the link type of port gigabitethernet0/2 to Trunk and allow services of VLAN15-VLAN30 and VLAN 1 to pass, and set PVID to 1.
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PE1(config)#interface gigabitethernet 0/2
PE1(config-if-gigabitethernet0/2)#switchport mode trunk
PE1(config-if-gigabitethernet0/2)#switchport trunk allowed vlan add 15-30,101
PE1(config-if-gigabitethernet0/2)#switchport trunk pvid vlan 1
PE1(config-if-gigabitethernet0/2)#exit
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#On PE1, configure the link type of port gigabitethernet0/3 to Trunk and allow services of VLAN100 and VLAN101 to pass, and set PVID to 1.
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PE1(config)#interface gigabitethernet 0/3
PE1(config-if-gigabitethernet0/3)#switchport mode trunk
PE1(config-if-gigabitethernet0/3)#switchport trunk allowed vlan add 100,101
PE1(config-if-gigabitethernet0/3)#switchport trunk pvid vlan 1
PE1(config-if-gigabitethernet0/3)#exit
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#On port gigabitethernet0/1 of PE1, configure the flexible QinQ function so that VLAN tags of VLAN100 are added to the packets of VLAN10-VLAN20.
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PE1(config)#interface gigabitethernet 0/1
PE1(config-if-gigabitethernet0/1)#vlan dot1q-tunnel enable
PE1(config-if-gigabitethernet0/1)#vlan dot1q-tunnel 10-20 100
PE1(config-if-gigabitethernet0/1)#exit
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#On port gigabitethernet0/2 of PE1, configure the flexible QinQ function so that VLAN tags of VLAN101 are added to the packets of VLAN15-VLAN30.
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PE1(config)#interface gigabitethernet 0/2
PE1(config-if-gigabitethernet0/2)#vlan dot1q-tunnel enable
PE1(config-if-gigabitethernet0/2)#vlan dot1q-tunnel 15-30 101
PE1(config-if-gigabitethernet0/2)#exit
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#On PE1, query the information about flexible QinQ entries.
PE1#show vlan dot1q-tunnel
--------------- -----------VLAN DOT1Q-TUNNEL------------- -----------------
Interface Count Inner VlanId Outer VlanId Inner VlanId
--------------- ------------------- -------------------- -----------------
gi0/1 --------------- 10-20 100 11
gi0/2 --------------- 15-30 101 16
Step 2: Configure PE2.
#On PE2, create VLAN10-VLAN30 and VLAN100-VLAN101.
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PE2#configure terminal
PE2(config)#vlan 10-30,100-101
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#On PE2, configure the link type of port gigabitethernet0/1 to Trunk and allow services of VLAN10-VLAN20 and VLAN100 to pass, and set PVID to 1.
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PE2(config)#interface gigabitethernet 0/1
PE2(config-if-gigabitethernet0/1)#switchport mode trunk
PE2(config-if-gigabitethernet0/1)#switchport trunk allowed vlan add 10-20,100
PE2(config-if-gigabitethernet0/1)#switchport trunk pvid vlan 1
PE2(config-if-gigabitethernet0/1)#exit
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#On PE2, configure the link type of port gigabitethernet0/2 to Trunk and allow services of VLAN15-VLAN30 and VLAN 1 to pass, and set PVID to 1.
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PE2(config)#interface gigabitethernet 0/2
PE2(config-if-gigabitethernet0/2)#switchport mode trunk
PE2(config-if-gigabitethernet0/2)#switchport trunk allowed vlan add 15-30,101
PE2(config-if-gigabitethernet0/2)#switchport trunk pvid vlan 1
PE2(config-if-gigabitethernet0/2)#exit
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#On PE2, configure the link type of port gigabitethernet0/3 to Trunk and allow services of VLAN100 and VLAN101 to pass, and set PVID to 1.
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PE2(config)#interface gigabitethernet 0/3
PE2(config-if-gigabitethernet0/3)#switchport mode trunk
PE2(config-if-gigabitethernet0/3)#switchport trunk allowed vlan add 100,101
PE2(config-if-gigabitethernet0/3)#switchport trunk pvid vlan 1
PE2(config-if-gigabitethernet0/3)#exit
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#On port gigabitethernet0/1 of PE2, configure the flexible QinQ function so that VLAN tags of VLAN100 are added to the packets of VLAN10-VLAN20.
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PE2(config)#interface gigabitethernet 0/1
PE2(config-if-gigabitethernet0/1)#vlan dot1q-tunnel enable
PE2(config-if-gigabitethernet0/1)#vlan dot1q-tunnel 10-20 100
PE2(config-if-gigabitethernet0/1)#exit
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#On port gigabitethernet0/2 of PE2, configure the flexible QinQ function so that VLAN tags of VLAN101 are added to the packets of VLAN15-VLA30.
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PE2(config)#interface gigabitethernet 0/2
PE2(config-if-gigabitethernet0/2)#vlan dot1q-tunnel enable
PE2(config-if-gigabitethernet0/2)#vlan dot1q-tunnel 15-30 101
PE2(config-if-gigabitethernet0/2)#exit
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#On PE2, query the information about flexible QinQ entries.
PE1#show vlan dot1q-tunnel
--------------- -----------VLAN DOT1Q-TUNNEL------------- -----------------
Interface Count Inner VlanId Outer VlanId Inner VlanId
--------------- ------------------- -------------------- -----------------
gi0/1 --------------- 10-20 100 11
gi0/2 --------------- 15-30 101 16
Step 3: Check the result.
#Through PE1 and PE2, the services of Intranet users CE1 and CE2 can be transmitted in VLAN100 of the carrier network with two layers of tags. Through PE1 and PE2, the services of Intranet users CE3 and CE4 can be transmitted in VLAN101 of the carrier network with two layers of tags.
Switch
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