802.3 Type/Length Fields

The Type/Length field is assigned and controlled by the IEEE which we are delighted to say are now publicly available. IANA maintains a public list of values that have been culled from various sources BUT IS NOT DEFINITIVE and in fact shows a number of conflicts.

The list below was derived from personal inspection and research and is INCOMPLETE and in the interests of consistency we will not be maintaining.

Value (Hex)	Status	Assigned to/Used by
0600	?	Xerox XNS
0800	Active	IP (TCP/IP) IETF
0801	?	X.75 over LAN
0805	?	X.25 Level 3 over LAN
0806	Active	ARP (IP) Address Resolution Protocol. IETF
08AD	?	Banyan
6004	?	DEC LAT
6005	?	DECNet diagnostics
8035	Active	RARP (Reverse ARP) IETF
8046 - 8047	?	AT&T
80D5	?	IBM SNA Service over Ethernet
8100	Active	IEEE VLAN 802.1Q Tag Protocol Identifier (TPID) followed by a 16 bit TCI value. IEEE.
8137 - 8138	?	Novell IPX/SPX

Problems, comments, suggestions, corrections (including broken links) or something to add? Please take the time from a busy life to 'mail us' (at top of screen), the webmaster (below) or info-support at zytrax. You will have a warm inner glow for the rest of the day.

802.3 Type/Length Fields

Tech

Standards

General

Telecom

Internet

Electronics