H3C Technologies H3C WX3000 Series Unified Switches - Manual (Page 569)

56-3
uplink port sets the TPID value for outer VLAN tags of these packets to the user-defined value, so that
these packets forwarded to the public network can be recognized by devices of other vendors.
As the position of the TPID field in an Ethernet packet is the same as that of the upper-layer protocol
type field in a packet without VLAN Tag, to avoid confusion in the process of receiving/forwarding a
packet, the TPID value cannot be any of the protocol type value listed in
Table 56-1 .
Table 56-1 Commonly used protocol type values in Ethernet frames
Protocol type Value
ARP 0x0806
IP 0x0800
MPLS 0x8847/0x8848
IPX 0x8137
IS-IS 0x8000
LACP 0x8809
802.1x 0x888E
VLAN-VPN Configuration
Configuration Task List
Complete the following tasks to configure VLAN-VPN:
Task Remarks
Enabling the VLAN-VPN Feature for a Port Required
TPID Adjusting Configuration Optional
Enabling the VLAN-VPN Feature for a Port
Configuration Prerequisites
z
The port is not a VLAN-VPN uplink port.
z
The port is not a remote mirror reflection port.
Configuration procedure
Follow these steps to enable the VLAN-VPN feature for a port:
To do… Use the command… Remarks
Enter system view system-view —
Enter Ethernet port view
interface interface-type
interface-number
—
Enable the VLAN-VPN
feature on the port
vlan-vpn enable
Required
By default, the VLAN-VPN feature is
disabled on a port.