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Topic: EtherType

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Ethernet

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	Use of IEEE Assigned Type Field
		The length and EtherType interpretations of this field are mutually exclusive.
		Requests for multiple EtherType Fields by the same applicant will not be granted unless the applicaant certifies that they are for unrelated purposes.
		In particular, only one new EtherType Field is necessary to limit reception of a new protocol or protocol family to the intended class of devices.
	standards.ieee.org /regauth/ethertype/type-tut.html (531 words)

	ng_etf(4) - Ethertype filtering netgraph node type
		etf node type multiplexes and filters data between hooks on the basis of the ethertype found in an ethernet header, presumed to be in the first 14 bytes of the data.
		If a packet has an ethertype that matches one of the values configured into the node, it must have arrived in on the hook for which that value was configured, otherwise it will be discarded.
		Sets the a new ethertype filter into the node and specifies the hook to and from which packets of that type should use.
	www.gsp.com /cgi-bin/man.cgi?section=4&topic=ng_etf (437 words)

	EtherType - Wikipedia, the free encyclopedia
		EtherType is a field in the Ethernet networking standard.
		It is used to indicate which protocol is being transported in an Ethernet frame.
		With the advent of the IEEE 802 suite of standards, the SNAP header, with the IEEE 802.2 LLC header, is used to transmit the EtherType of the packet for IEEE 802 networks other than Ethernet, as well as for non-IEEE networks that use the IEEE 802.2 LLC header, such as FDDI.
	www.sciencedaily.com /encyclopedia/ethertype (147 words)

	IEEE EtherType Registration Authority
		This listing will be updated as new assignments are issued.
		It is important to realize that this is a partial listing of all assigned EtherType Field.
		Not all recipients wish to publish their assignment at this time.
	standards.ieee.org /regauth/ethertype/index.shtml (37 words)

	EtherType: The Ethernet Type Field and Values
		EtherType is a field in the Ethernet frame, which indicates the protocol used in the data field of the frame.
		When the value of this field is greater than or equal to 1536 decimal (equal to 0600 hexadecimal) the EtherType Field indicates the nature of the MAC client protocol (EtherType interpretation).
		EtherType Field is administrated by the IEEE RAC EtherType Field Approval Authority for review and approval.
	www.networkdictionary.com /networking/EtherType.php (184 words)

	IEEE Standards Website Outline
		Guidelines for Fibre Channel Use of the Company_id
		Wire Transfer Instruction Sheet for Purchase of an EtherType Field Address
		IEEE POSIX®: Testing Policy - Certificate of Validation Requirements for FIPS 151-2
	standards.ieee.org /sitenav.html (75 words)

	Ethertype :: netzikon :: Netzwerklexikon (Site not responding. Last check: )
		Ethertype ist das Typfeld im Header von Ethernet II.
		Der Ethertype spezifiziert das im Ethernetframe transportierte Protokoll.
		Ethertype 0x0800 = IP V4 Ethertype 0x0806 = ARP
	www.netzikon.net /lexikon/e/ethertype.html (85 words)

	Chapter 15 - Configuring Filters (Site not responding. Last check: )
		Protocol filters (IP protocol, IP port, and Ethertype) prevent or allow the use of specific protocols through the access point/bridge's Ethernet and radio ports.
		Ethertype filters prevent or allow the use of specific protocols through the access point/bridge's Ethernet and radio ports.
		The filter's default action must be the opposite of the action for at least one of the Ethertypes in the filter.
	www.cisco.com /univercd/cc/td/doc/product/wireless/airo1300/brsc1234/o13filt.htm (2388 words)

	[rbridge] FTag
		With all the respect for wikipedia, I prefer a reference to IEEE 802.1Q and IEEE 802.1D in which the Ethertype is considered part of the options/shims.
		This is hardware friendly, since inserting or removing the shim does not change the 32 bit alignment of what follows.
		IMHO TRILL should adopt a shim header that is N32 including the Ethertype* = TRILL or 16 + M32 excluding the Ethertype*.
	www.postel.org /pipermail/rbridge/2006-October/001385.html (634 words)

	[rbridge] FTag
		802.1Q --> > "shims" include the Ethertype, because they replace the original --> > one with 0x8100 and have to include the original in the "shim." --> > --> > I assume that a similar observation could be made about 802.1S.
		The original Ethertype stays in the original --> > - re-encapsulated, or tunneled - Ethernet frame.
		--> 6 bytes of DA --> 6 bytes of SA --> 2 bytes of Ethertype --> 4 bytes of shim --> ---------------------- --> 18 bytes --> --> Which is 2 bytes short of N*32, i.e.
	www.postel.org /pipermail/rbridge/2006-October/001412.html (1386 words)

	Проект OpenNet: MAN ng_etf (4) Специальные файлы /dev/* (FreeBSD и Linux)
		Incoming Ethernet frames are accepted on the downstream hook and if the ethertype matches a value which the node has been configured to filter, the packet is forwarded out the hook which was identified at the time that value was configured.
		Ethertypes of values other than those configured by the control messages must have arrived via the nomatch hook.
		The hook and ethertype are specified in a structure of type Vt struct ng_etffilter :
	bsd.opennet.ru /man.shtml?topic=ng_etf&category=4&russian=1 (606 words)

	When protocols collide: Field technicians can benefit from learning frame relay protocol quirks (Site not responding. Last check: )
		Ethertype and encapsulation Network layer protocol identification over WAN links is not a problem unique to frame relay.
		Ethertype encapsulation worked well enough that frame relay CPE manufacturers were successful and established large installed equipment bases.
		The next two bytes are the Ethertype, 0800 hexadecimal, which indicates that the encapsulated data is an IP datagram.
	telephonyonline.com /mag/telecom_protocols_collide_field (2425 words)

	EtherType (Site not responding. Last check: )
		The original Xerox Version 1 Ethernet network standard had a 16 bit lengthfield, although the maximum length of a packet was 1500 bytes.
		This length field was soon re-used in the Version 2 Ethernetprotocol as a sub-protocol label field called the EtherType, with the convention that values between 0 and 1500indicated the use of the original Ethernet format with a length field, but higher values indicated the use of the new frameformat with an EtherType sub-protocol identifier.
		With the advent of the IEEE 802 suite of standards, the SNAP header is now sometimes used to transmit the EtherType of the packet forstandards such as the Internet Protocol that originally used theearlier Ethernet standard.
	www.therfcc.org /ethertype-44366.html (141 words)

	[No title] (Site not responding. Last check: )
		Header Compression Algorithm In order to use the proposed EtherType to indicate the PDU is header-compressed, both the sender and receiver have to agree with the compression algorithm.
		It uses a newly proposed EtherType to indicate that the payload is header-compressed.
		The EtherType has the value of TBD which is not tied to a specific header compression algorithm.
	www.ietf.org /internet-drafts/draft-byun-ipdvb-ule-header-comp-01.txt (1662 words)

	The Ethernet Version II Frame Fo (Site not responding. Last check: )
		The Ethertype is analogous to the SAPs in the 802.3 frame in that it specifies the memory buffer in which to place this frame.
		Since the maximum frame size in Ethernet is 1518 bytes, there is no point in overlapping between Ethertypes and lengths.
		Following the Ethertype are 46 to 1,500 bytes of data, generally consisting of upper layer headers such as TCP/IP or IPX and then the actual user data.
	www.netcolony.com /clifford/ethernet_version_ii_frame_fo.htm (464 words)

	Qustion about minimum Ethertype value.
		>>> "Ethertypes were originally specified by Xerox under the DIX framework for Ethernet.
		After specification of IEEE 802.3 [LLC], the set of Ethertypes less than or equal to 1500 (0x05FC), assumed the role of a length indicator.
		Ethertypes less than 1536 (0x600 in hexadecimal), assumed the role of a
	www.erg.abdn.ac.uk /ipdvb/archive/0405/msg00001.html (382 words)

	RFC 3293 (rfc3293) - General Switch Management Protocol (GSMP) Packet Enca
		(0x880C is the assigned Ethertype for GSMP.) The maximum transmission unit (MTU) of the GSMP Message field is 1492 bytes.
		The virtual channel over which a GSMP session is established between a controller and the switch it is controlling is called the GSMP control channel.
		Ethertype The assigned Ethertype for GSMP is 0x880C.
	www.incywincy.com /default?catid=829242&cached=www.faqs.org/rfcs/rfc3293.html (1674 words)

	Protocol Filtering: Creating Cool Filters
		For example, in the Ethernet II header, the value in the Ethertype field indicates which protocol follows the Ethernet header.
		A value of 0x0800 in the Ethertype field indicates that an IP header is coming next.
		The first PID field is the Ethertype field in the Ethernet header.
	support.novell.com /techcenter/articles/nc2002_04c.html (2213 words)

	Extend 802.1Q dissector for 802.1QinQ \| Ethereal \| dev
		ethertype field values is 0x9100 (default in the realization of the most
		A fixed ethertype can be included when one is officially assigned.
		> ethertype field values is 0x9100 (default in the realization of the most
	www.gossamer-threads.com /lists/ethereal/dev/68822 (273 words)

	PC/TCP Packet Driver Specification
		The link-layer demultiplexing information is passed via the type and typelen fields, but values and interpretation depend on the class of packet driver (and thus on the media in use).
		Developers should note that, on many networks and protocol families, the byte-ordering of 16-bit quantities on the network is opposite to the native byte-order of the PC.
		The problem is that the "ethertype" of Blue Book packets is in bytes 12 and 13 of the header, and in 802.3 the corresponding bytes are interpreted as a length.
	crynwr.com /packet_driver.html (4139 words)

	RFC 4441 - The IEEE 802/IETF Relationship
		EtherType Allocation The EtherType field is very limited, so that allocations are made solely on an "as needed" basis.
		For related uses, a single EtherType should be requested, with additional fields serving as sub-protocol identifiers, rather than applying for multiple EtherTypes.
		While a fee is normally charged by IEEE 802 for the allocation of an EtherType, IEEE 802 will consider waiving the fee for allocations relating to an IETF standards track document, based on a request from the IESG.
	www.packetizer.com /rfc/rfc4441 (5814 words)

	DomainsAreFree - Definition of Ethernet
		The original Xerox Version 1 Ethernet had a 16 bit length field, although the maximum length of a packet was 1500 bytes.
		The 802.x variants of Ethernet are not in widespread use on common networks currently, with the exception of large corporate Netware installations that have not yet migrated to Netware over IP.
		The most common type used today is Ethernet Version 2, as it is used by most Internet Protocol-based networks, with its EtherType set to 0x0800.
	www.domainsarefree.com /glossary/Ethernet.html (2600 words)

	Type / Length (2 bytes) (Ethernet) (Site not responding. Last check: )
		A well-known EtherType value is 0x0800 for DoD IP.
		EtherType values less than 1536 (0x0600) had been cancelled during IEEE 802.3 standardization; they were replaced by higher values above 1536.
		This had been necessary in order to enable Ethernet stations to identify the used Ethernet variant (DIX or IEEE standard).
	www.synapse.de /ban/HTML/P_LAYER2/Eng/P_layer7.html (264 words)

	Ethereal: [Ethereal-users] MS-based Ethertype Decode
		Hello, I'm seeing a good deal (from one host) of traffic of Ethertype x886f sourced from MAC address 02:01:00:00:00:00 destined to the local broadcast.
		The frames are 1510 bytes in size, and repeat at a rate of roughly two per second.
		The user of the system is not aware of anything 'enabled' on his Win2000 system that could be generating this traffic.
	www.ethereal.com /lists/ethereal-users/200202/msg00012.html (183 words)

	EHS Company - - Primer: Bringing Prioritization Services To Ethernet -
		The 802.1p addendum to the 802.1D standard should be finalized by the time you read this, and the 802.1Q specification is expected to be ratified this fall (we were unable to obtain exact dates from the IEEE).
		With the addition of 4 bytes to the frame's header, the frame is made incompatible with all of the legacy Ethernet devices that are trying to use the older frame format.
		In particular, since the data is inserted before the 802.3 length field (or Ethernet II's ethertype field), any product that expects to see length or ethertype data at that location will not find it.
	www.ehsco.com /reading/19980801ncw1.html (2502 words)

	[No title]
		The ethertype value 8847 hex is used to indicate that a frame is carrying an MPLS unicast packet.
		The ethertype value 8848 hex is used to indicate that a frame is carrying an MPLS multicast packet.
		These ethertype values can be used with either the ethernet encapsulation or the 802.3 SNAP/SAP encapsulation to carry labeled packets.
	www-x.antd.nist.gov /nistswitch/drafts/draft-rosen-mpls-lan-encaps-00.txt (642 words)

	Protocol Analysis - Unit 2 Sec 2a
		he original Ethernet Version 2 frame varies slightly from the 802.3 Ethernet frame format in that a Type field, also referred to as Ethertype, is used in place of the Length field (also 2 bytes), as shown on the Ethernet V2 Frame Format Diagram.
		The Type field is used to "steer" the information up the protocol stack to the next layer, just as the DSAP value did in the 802.2 LLC header.
		Examples of Ethertype values are 0x0800 for IP and 0x0806 for Address Resolution Protocol (ARP).
	www.webclasses.net /Courses/Protocols/7.0/DemoBuild/units/unit02/sec02a.html (1060 words)

	Ethernet Frame Types (Site not responding. Last check: )
		Ethernet II Again, a similar frame type, EXCEPT that the two-byte Length field has been replaced with a two-byte Type field (Ethertype).
		If the EtherType/Length value is greater than 0x05-DC (decimal 1500), then process the frame as Ethernet II.
		Any EtherType value greater than 0x05-DC (such as 0x0800 for IP or 0x81-37 for NetWare IPX/SPX) will be interpreted as an Ethernet II frame.
	telecom.tbi.net /frmlan.html (574 words)

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