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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 802.1 is a working group of the IEEE 802 project of the IEEE Standards Association. It is concerned with: 802 LAN/MAN architecture; internetworking among 802 LANs, MANs and wide area networks; 802 Link Security; 802 overall network management; protocol layers above the MAC and LLC layers; LAN/MAN bridging and management.
StandardDescriptionStatus802.1B-1992LAN/MAN ManagementWithdrawn in 2004802.1k-1993 [2]Discovery and Dynamic Control of Event ...Withdrawn in 2004Superseded by 802.1D-1998802.1i-1995FDDI bridging (see ANSI X3T9.5)SupersededDec 11, 2002 · This amendment specifies changes to IEEE Std 802.1Q-2005, as amended by IEEE Std 802.1ad-2005, IEEE Std 802.1ag-2007, IEEE Std 802.1ak-2007, IEEE Std 802.1ah-2008, and IEEE Std 802.1ap-2008, that support provisioning systems that explicitly select traffic engineered paths within Provider Backbone Bridged Networks.
Dec 31, 2002 · 802.1ad - Provider Bridges. This amendment to IEEE Std 802.1Q-1998 is intended to develop an architecture and bridge protocols, compatible and interoperable with existing Bridged Local Area Network protocols and equipment, to provide separate instances of the MAC services to multiple independent users of a Bridged Local Area Network in a manner that does not require cooperation among the users ...
DateDocument31 Dec 200214 Jul 200320 Jul 200322 Sep 2003- Tony Jeffree
IEEE 802.1ad is an Ethernet networking standard. It is as an amendment to IEEE standard IEEE 802.1Q-1998 and was incorporated into the base 802.1Q standard in 2011. The technique specified by the standard is known as provider bridging and stacked VLANs and informally as QinQ. The original 802.1Q specification allows a single virtual local area network (VLAN) header to be inserted into an ...
Feb 15, 2022 · Main Question: I'm wondering why the IEEE standard 802.1ad, which specifies the TPID of a S-VLAN as 0x88a8, for double tagged vlans exists, when it's also possible to just use two 802.1Q tags with the TPID 0x8100. What is the advantage of using 0x88a8?
Apr 9, 2014 · From Cisco's Inter-Switch Link and IEEE 802.1Q Frame Format: Frame Size. The default maximum transmission unit (MTU) of an interface is 1500 bytes. With an outer VLAN tag attached to an Ethernet frame, the packet size increases by 4 bytes. Therefore, it is advisable that you appropriately increase the MTU of each interface on the provider network.
