What is 0x8100 EtherType?

802.1Q VLAN tagging uses an 0x8100 EtherType value. The payload following includes a 16-bit tag control identifier (TCI) followed by an Ethernet frame beginning with a second (original) EtherType field for consumption by end stations. IEEE 802.1ad extends this tagging with further nested EtherType and TCI pairs.

What is the EtherType for an encapsulated IPv6 packet?

IPv6 Ethernet encapsulation (RFC 2464) IPv6 packets are encapsulated in Ethernet packets just like IPv4 packets, but with a new Ethertype (86DD rather than 0800).

What is the EtherType for IPv4 and IPv6 IP packets?

For example, a common link-layer encapsulation for Ethernet, called Ethernet II, uses a 16-bit EtherType field to identify the Ethernet frame payload. For IPv4 packets, the EtherType field is set to 0x800. For IPv6 packets, the EtherType field is set to 0x86DD.

What is EtherType 0x0800?

The EtherType is the last two bytes in the Ethernet/IEEE 802.3 header, meaning that the next byte in the stream will be the first byte in the header of the next higher protocol. If the EtherType = 0x0800, the higher-layer protocol is IPv4. The first nibble is the version number; this value is 0x4 to indicate IPv4.

Why transition from IPv4 to IPv6 is performed?

The rationale for transition is either the lack of IPv4 address space or the required use of new features in IPv6, or both. IPv6/IPv4 node – A host or router that implements both IPv4 and IPv6, which is also known as dual-stack. IPv6-only node – A host or router that implements IPv6, and does not implement IPv4.

What is canonical format indicator?

The Canonical Format Indicator (CFI) bit indicates whether the following 12 bits of VLAN identifier conform to Ethernet or not. (The other possible value, CFI=1, is used for Token Ring LANs, and tagged frames should never be bridged between an Ethernet and Token Ring LAN regardless of the VLAN tag or MAC address.)

What are the values of the EtherType field?

Thus, values of 1500 and below for this field indicate that the field is used as the size of the payload of the Ethernet frame while values of 1536 and above indicate that the field is used to represent an EtherType. The interpretation of values 1501–1535, inclusive, is undefined.

How is EtherType and EtherType used in Ethernet?

The same field is also used to indicate the size of some Ethernet frames. EtherType was first defined by the Ethernet II framing standard, and later adapted for the IEEE 802.3 standard. This field is used by the data link layer to determine which protocol to hand over the payload to on the receiving end.

How many octets are in the EtherType field?

Each lower slot designates an octet; the EtherType is two octets long. In modern implementations of Ethernet, the field within the Ethernet frame used to describe the EtherType also can be used to represent the size of the payload of the Ethernet Frame.

How big of a frame can EtherType be used for?

The size of the payload of non-standard jumbo frames, typically ~9000 Bytes long, falls within the range used by EtherType, and cannot be used for indicating the length of such a frame.