3Com S7906E Configuration Manual page 248

# Enter system view.
<DeviceB> system-view
# Configure GigabitEthernet 2/0/1 to permit frames of VLAN 100 to pass through.
[DeviceB] interface gigabitethernet 2/0/1
[DeviceB-GigabitEthernet2/0/1] port link-type trunk
[DeviceB-GigabitEthernet2/0/1] port trunk permit vlan 100
[DeviceB-GigabitEthernet2/0/1] quit
# Configure GigabitEthernet 2/0/2 to permit frames of VLAN 100 to pass through.
[DeviceB] interface gigabitethernet 2/0/2
[DeviceB-GigabitEthernet2/0/2] port link-type trunk
[DeviceB-GigabitEthernet2/0/2] port trunk permit vlan 100
3) Configuration on Device C
# Specify the original CVLAN and SVLAN in the VLAN mapping for VPN 1 traffic received on
GigabitEthernet 2/0/1.
<DeviceC> system-view
[DeviceC] traffic classifier downlink_in
[DeviceC-classifier-downlink_in] if-match customer-vlan-id 10
[DeviceC-classifier-downlink_in] if-match service-vlan-id 100
[DeviceC-classifier-downlink_in] quit
# Specify the new SVLAN used for replacing the original SVLAN for incoming VPN 1 traffic on
GigabitEthernet 2/0/1.
[DeviceC] traffic behavior downlink_in
[DeviceC-behavior-downlink_in] remark service-vlan-id 200
[DeviceC-behavior-downlink_in] quit
# Configure an uplink policy to map the original SVLAN and CVLAN to the new SVLAN.
[DeviceC] qos policy downlink_in
[DeviceC-qospolicy-downlink_in] classifier downlink_in behavior downlink_in
[DeviceC-qospolicy-downlink_in] quit
# Specify the new CVLAN and SVLAN in the VLAN mapping for outgoing VPN 1 traffic on
GigabitEthernet 2/0/1.
[DeviceC] traffic classifier downlink_out
[DeviceC-classifier-downlink_out] if-match customer-vlan-id 30
[DeviceC-classifier-downlink_out] if-match service-vlan-id 200
[DeviceC-classifier-downlink_out] quit
# Specify the original CVLAN and SVLAN for outgoing VPN 1 traffic on GigabitEthernet 2/0/1.
[DeviceC] traffic behavior downlink_out
[DeviceC-behavior-downlink_out] remark customer-vlan-id 10
[DeviceC-behavior-downlink_out] remark service-vlan-id 100
[DeviceC-behavior-downlink_out] quit
# Configure a downlink policy to map the new CVLAN and SVLAN to the original CVLAN and SVLAN for
the outgoing VPN 1 traffic on GigabitEthernet 2/0/1.
[DeviceC] qos policy downlink_out
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