Field in Ethernet frames indicating which protocol is encapsulated in the payload
EtherType is a two-octet field in an Ethernet frame. It is used to indicate which protocol is encapsulated in the payload of the frame and is used at the receiving end by the data link layer to determine how the payload is processed. The same field is also used to indicate the size of some Ethernet frames.
EtherType is also used as the basis of 802.1Q VLAN tagging, encapsulating packets from VLANs for transmission multiplexed with other VLAN traffic over an Ethernet trunk.
EtherType was first defined by the Ethernet II framing standard and later adapted for the IEEE 802.3 standard. EtherType values are assigned by the IEEE Registration Authority.
the IEEE Assigned Ethertype with IEEE Std 802.3 Local and Metropolitan Area Networks (PDF), retrieved 2022-02-03 "Public EtherType list". IEEE. Retrieved...
(each six octets in length), the EtherType field and, optionally, an IEEE 802.1Q tag or IEEE 802.1ad tag. The EtherType field is two octets long and it...
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maintained and published by the Internet Assigned Numbers Authority (IANA). EtherType Internet Protocol IPv4 (including packet structure) IPv6 (and packet structure)...
protocol). Instead, retransmissions rely on higher-layer protocols. As the EtherType in an Ethernet frame using Ethernet II framing is used to multiplex different...
Service Access Point (SAP) fields. SNAP supports identifying protocols by EtherType field values; it also supports vendor-private protocol identifier spaces...
underlying network as raw payload. In the case of Ethernet, a 0x0806 EtherType value is used to identify ARP frames. The size of the ARP message depends...
indicates an encapsulated EtherType. Ethernet II encapsulation comprises an Ethernet II frame header (destination MAC, source MAC, EtherType 0x8137) followed by...
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Other multicast and unicast destination addresses are permitted. The EtherType field is set to 0x88cc. Each LLDP frame starts with the following mandatory...
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sender for a specified period of time. A media access control (MAC) frame (EtherType 0x8808) is used to carry the pause command, with the Control opcode set...
in turn may be encapsulated into a proper Ethernet frame format with EtherType values of 0x8847 and 0x8848. The increased overhead of extra MPLS and...
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switch. In the case of Ethernet frames this is done through the use of EtherType values 0x8847 and 0x8848, for unicast and multicast connections respectively...
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