3com WX3000 User Manual

 

1-4 

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To change the global TPID value 0x8100, you need to specify a port on the device as a VLAN VPN 

uplink port. Before the configuration, make sure that VLAN VPN is disabled on the port. 

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For proper packet transmission, confirm the TPID value of the peer device in the public network 

before adjusting the TPID value.  

Follow these steps to adjust the TPID value for VLAN-VPN packets on a port: 

Enter system view 

— 

Set the TPID value globally 

vlan-vpn tpid value 

Required 

Do not set the TPID value to any of the 
protocol type values listed in 

.

The default TPID value used on the 
device is 0x8100. 

Enter Ethernet port view 

interface interface-type 
interface-number  

— 

Set the port to be a VLAN-VPN 
uplink port 

Optional 

By default, the VLAN-VPN uplink 
function is disabled. 

 

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A port cannot be configured as both a VLAN VPN port and a VLAN VPN uplink port at the same 

time.  

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With the TPID being 0x8100, every port can be configured as a VLAN VPN uplink port. However, if 

the TPID value is not the default value, you need to use the vlan-vpn uplink enable command to 

specify a VLAN VPN uplink port.  

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A VLAN VPN uplink port does not remove the outer VLAN tags of packets to be sent through it, so 

a VLAN VPN uplink port must be configured as a trunk port or hybrid port and configured to keep 

the outer VLAN when sending packets of the outer VLAN.  

 

Display the VLAN-VPN 
configurations of all the ports 

Available in any view