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tag control information (802.1ad) (TCI)

For VLAN tagging according to IEEE 802.1ad and 802.1ah, a 4- byte tagging field is inserted into the Ethernet frame. It consists of two 2-byte data fields each, the Tag Protocol Identifier( TPID) and the Tag Control Information (TCI).

TPID and TCI data field for VLAN tagging according to 802.1Q and 802.1ah

TPID and TCI data field for VLAN tagging according to 802.1Q and 802.1ah

The TCI data field, in turn, is composed of the 3-bit-long Priority Code Point( PCP) data field, the 1-bit Canonical Format Indicator( CFI) field and the 12-bit-long VLAN Identifier( VID) data field.

Informations:
Englisch: tag control information (802.1ad) - TCI
Updated at: 22.07.2011
#Words: 83
Links: VLAN tagging, IEEE 802, byte (B), field, Ethernet frame
Translations: DE
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