3Com 4200G # Set the Tpid value of Ethernet 1/0/12 to, # Set the Tpid value of Ethernet 1/0/22 to

Configuring VLAN-VPN 323

# Set the TPID value of Ethernet 1/0/12 to 0x9200.

[SwitchA-Ethernet1/0/12] vlan-vpn tpid 9200

■Configure Switch B

#Enable VLAN-VPN on Ethernet 1/0/21 of Switch B, using the tag of VLAN 1040 as the outer VLAN tag for packets received on this port.

<SwitchB> system-view [SwitchB] vlan 1040 [SwitchB-vlan1040] port Ethernet 1/0/21

[SwitchB-vlan1040] quit

[SwitchB] interface Ethernet 1/0/21 [SwitchB-Ethernet1/0/21] undo ntdp enable

[SwitchB-Ethernet1/0/21] stp disable

[SwitchB-Ethernet1/0/21] vlan-vpn enable

#Set the TPID value of Ethernet 1/0/21 to 0x9200 for intercommunication with the devices in the public network.

[SwitchB-Ethernet1/0/21] vlan-vpn tpid 9200

[SwitchB-Ethernet1/0/21] quit

#Configure Ethernet 1/0/22 as a trunk port that permits tagged packets of VLAN 1024.

[SwitchA] interface Ethernet 1/0/22

[SwitchA-Ethernet1/0/22] port link-type trunk

[SwitchA-Ethernet1/0/22] port trunk permit vlan 1040

# Set the TPID value of Ethernet 1/0/22 to 0x9200.

[SwitchA-Ethernet1/0/22] vlan-vpn tpid 9200

■Configure the devices in the public network

#As the devices in the public network are from other vendors, only a basic principle is introduced here. That is, you need to configure the devices connecting to Ethernet 1/0/12 of Switch A and Ethernet 1/0/22 of Switch B to permit tagged packets of VLAN 1040.

Complete Configuration ■ Configure Switch A

#

vlan 1040

#

interface Ethernet1/0/11 port access vlan 1040

undo ntdp enable stp disable vlan-vpn enable vlan-vpn tpid 9200

#

interface Ethernet1/0/12 port link-type trunk

port trunk permit vlan 1 1040 vlan-vpn tpid 9200