Configuring the TPID Value in an Outer VLAN Tag
To enable interoperation between devices from different vendors, set the same TPID value in outer VLAN tags on the devices.
Context
Devices from different vendors or in different network plans may use different TPID values in VLAN tags of VLAN packets. To adapt to an existing network plan, the switch supports TPID value configuration. You can set the TPID value on the switch to be the same as the TPID value in the network plan to ensure compatibility with the current network.
- To implement interoperability with a non-Huawei device, ensure that the protocol type in the outer VLAN tag added by the switch can be identified by the non-Huawei device.
- The qinq protocol command identifies incoming packets, and adds or changes the TPID value of outgoing packets.
- The protocol ID configured on an interface by the qinq protocol command must be different from other commonly used protocol IDs; otherwise, the interface cannot distinguish packets of these protocols. For example, protocol-id cannot be set to 0x0806, which is the ARP protocol ID.
- A maximum of four VLAN TPIDs can be configured on one card, and the TPID configured on an interface of an X series card takes effect on all interfaces of the card.
Procedure
- Run:
system-view
The system view is displayed.
- Run:
interface interface-type interface-number
The interface view is displayed.
- Run:
qinq protocol protocol-id
The protocol type in the outer VLAN tag is set.
The qinq protocol command cannot be used on Dot1q-tunnel interfaces.
By default, the TPID value in the outer VLAN tag is 0x8100.