To ensure that devices from different vendors can communicate with each other, set the TPID value of an outer VLAN tag.
Context
Devices from different vendors or different network plans may use different values for TPID fields in outer VLAN tags of QinQ packets. To be compatible with an existing network plan, the AR router supports configuration of the TPID value. You can set the TPID value on the AR router to be the same as the TPID value in the network plan so that the AR router can be compatible on the existing network.
NOTE
l To implement the connectivity between the devices of different vendors, ensure that the protocol type in the outer VLAN tag can be identified by the peer device.
l The qinq protocol command identifies incoming packets, and adds or changes the TPID value of outgoing packets.
l The protocol IDs set by the qinq protocol command cannot be the same as well-known 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.
The steps:
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
The interface view is displayed.
Step 3 Run:
qinq protocol protocol-id
The protocol type in the outer VLAN tag is set.
By default, the TPID value in the outer VLAN tag is 0x8100.
—-End
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