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IEEE 802.1ad is an amendment to the IEEE 802.1Q-1998 networking standard which adds support for provider bridges. It was incorporated into the base 802.1Q standard in 2011. [ 1 ] The technique specified by the standard is known informally as stacked VLANs or QinQ .
IEEE 802.1Q, often referred to as Dot1q, is the networking standard that supports virtual local area networking (VLANs) on an IEEE 802.3 Ethernet network. The standard defines a system of VLAN tagging for Ethernet frames and the accompanying procedures to be used by bridges and switches in handling such frames.
With the advent of the IEEE 802 suite of standards, a Subnetwork Access Protocol (SNAP) header combined with an IEEE 802.2 LLC header is used to transmit the EtherType of a payload 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. However, for Ethernet, Ethernet II ...
VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol that propagates the definition of VLANs on the whole local area network. VTP is available on most of the Cisco Catalyst Family products. The comparable IEEE standard in use by other manufacturers is GARP VLAN Registration Protocol (GVRP) or the more recent Multiple VLAN Registration ...
The IEEE 802.1Q tag or IEEE 802.1ad tag, if present, is a four-octet field that indicates virtual LAN (VLAN) membership and IEEE 802.1p priority. The first two octets of the tag are called the T ag P rotocol ID entifier (TPID) and double as the EtherType field indicating that the frame is either 802.1Q or 802.1ad tagged. 802.1Q uses a TPID of ...
Incorporated into 802.1Q-2003 802.1s-2002: Multiple Spanning Trees: Incorporated into 802.1Q-2003 802.1Q-2003: Virtual Bridged Local Area Networks (Rollup of 802.1Q-1998, 802.1s, 802.1u and 802.1v) Superseded by 802.1Q-2005 P802.1z Maintenance to 802.1Q-2003 Merged into 802.1Q-2005 802.1Q-2005: Virtual Bridged Local Area Networks (Rollup of 802 ...
SPB (the generic term for both) combines an Ethernet data path (either IEEE 802.1Q in the case of SPBV, or PBBs per IEEE 802.1ah in the case of SPBM) with an IS-IS link state control protocol running between Shortest Path bridges (Network-to-network interface (NNI) links). The link state protocol is used to discover and advertise the network ...
VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol that propagates the definition of Virtual Local Area Networks on the whole local area network. [1] To do this, VTP carries VLAN information to all the switches in a VTP domain. VTP advertisements can be sent over 802.1Q, and ISL trunks.