10
[PE1-Twenty-FiveGigE1/0/3] quit
2. Configure PE 2:
# Configure Twenty-FiveGigE 1/0/1 as a trunk port, and assign it to VLAN 200.
<PE2> system-view
[PE2] interface twenty-fivegige 1/0/1
[PE2-Twenty-FiveGigE1/0/1] port link-type trunk
[PE2-Twenty-FiveGigE1/0/1] port trunk permit vlan 200
# Set the PVID of Twenty-FiveGigE 1/0/1 to VLAN 200.
[PE2-Twenty-FiveGigE1/0/1] port trunk pvid vlan 200
# Enable QinQ on Twenty-FiveGigE 1/0/1.
[PE2-Twenty-FiveGigE1/0/1] qinq enable
[PE2-Twenty-FiveGigE1/0/1] quit
# Configure Twenty-FiveGigE 1/0/2 as a trunk port, and assign it to VLANs 100 and 200.
[PE2] interface twenty-fivegige 1/0/2
[PE2-Twenty-FiveGigE1/0/2] port link-type trunk
[PE2-Twenty-FiveGigE1/0/2] port trunk permit vlan 100 200
# Set the TPID value in the SVLAN tags to 0x8200 on Twenty-FiveGigE 1/0/2.
[PE2-Twenty-FiveGigE1/0/2] qinq ethernet-type service-tag 8200
[PE2-Twenty-FiveGigE1/0/2] quit
# Configure Twenty-FiveGigE 1/0/3 as a trunk port, and assign it to VLAN 100.
[PE2] interface twenty-fivegige 1/0/3
[PE2-Twenty-FiveGigE1/0/3] port link-type trunk
[PE2-Twenty-FiveGigE1/0/3] port trunk permit vlan 100
# Set the PVID of Twenty-FiveGigE 1/0/3 to VLAN 100.
[PE2-Twenty-FiveGigE1/0/3] port trunk pvid vlan 100
# Enable QinQ on Twenty-FiveGigE 1/0/3.
[PE2-Twenty-FiveGigE1/0/3] qinq enable
[PE2-Twenty-FiveGigE1/0/3] quit
3. Configure the devices between PE 1 and PE 2:
# Set the MTU to a minimum of 1504 bytes for each port on the path of QinQ frames. (Details
not shown.)
# Configure all ports on the forwarding path to allow frames from VLANs 100 and 200 to pass
through without removing the VLAN tag. (Details not shown.)
Example: Configuring VLAN transparent transmission
Network configuration
As shown in Figure 4:
• The service provider assigns VLAN 100 to a company's VLANs 10 through 50.
• VLAN 3000 is the dedicated VLAN of the company on the service provider network.
Configure QinQ on PE 1 and PE 2 to provide Layer 2 connectivity for CVLANs 10 through 50 over the
service provider network.
Configure VLAN transparent transmission for VLAN 3000 on PE 1 and PE 2 to enable the hosts in
VLAN 3000 to communicate without using an SVLAN.
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