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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. 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Withdrawn in 2004Superseded by 802.1D-1998802.1i-1995FDDI bridging (see ANSI X3T9.5)SupersededIEEE 802.11ad. IEEE 802.11ad is an amendment to the IEEE 802.11 wireless networking standard, developed to provide a Multiple Gigabit Wireless System (MGWS) standard in the 60 GHz band, and is a networking standard for WiGig networks.
IEEE 802.1ad ist eine Änderung des Netzstandards IEEE 802.1Q-1998, mit der die Unterstützung für Provider-Bridges hinzugefügt wird. Sie wurde 2011 in den Basisstandard 802.1Q aufgenommen. Die in der Norm spezifizierte Technik ist informell als gestapelte VLANs oder QinQ bekannt.
IEEE 802.1ad è uno standard definito dall'ente internazionale IEEE nell'ambito del gruppo 802.1 sull'architettura delle reti dati basate sul protocollo Ethernet . L'ultima versione, intitolata 802.1ad Provider Bridges, è stata approvata l'8 dicembre 2005 e pubblicata il 26 maggio 2006. [1] Indice. 1 Caratteristiche. 2 Formato di trama. 3 Meccanismo
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 ...
IEEE 802.1ad 或稱為 QinQ 、 vlan stacking 。 是一種以 802.1Q 為基礎衍生出來的通訊協定。 原始 802.1Q 為允許加入單一Vlan header。 QinQ允許兩個Vlan header被放置在同一個frame中。 主要用途為電信供應商可以放置一個vlan標籤作為通過外部網路的辨識,而不需變動客戶的封包所帶出的vlan標籤。 優點. 1. 擴充原始的vlan個數,从4094扩大到4094(inner)*4094(outer)。 2. ISP可以針對單一客戶設置單一vlan tag,而不需變更客戶的封包資訊。 3. 不需要客戶的相互配合及合作,即可進行供應商橋樑的配置。 端口角色. Normal port : 给802.1Q訊框通行的port。