TPID

Hi friend!
if a frame carries the VLAN tag with TPID 0x8100 but the TPID configured for a customer network on a device is 0x8200.

https://support.huawei.com/hedex/hdx.do?docid=EDOC1100196229&id=EN-US_CONCEPT_0177102805&lang=en

Hope to help you!

Hi Hi

The Tag Protocol Identifier (TPID) specifies the protocol type of a VLAN tag. The TPID value defined in IEEE 802.1Q is 0x8100.

The Ethernet packet format is defined in IEEE 802.1Q. An IEEE 802.1Q tag, containing the TPID, is located between the Source Address field and the Length/Type field. The device checks the TPID value in a received frame to determine whether the VLAN tag is a service VLAN (S-VLAN) tag or a customer (C-VLAN) tag. The device compares the configured TPID value with the TPID value in the frame. For example, if a frame carries the VLAN tag with TPID 0x8100 but the TPID configured for a customer network on a device is 0x8200, the device considers the frame untagged.