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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 a VLAN Management Policy Server (VMPS), an administrator can assign switch ports to VLANs dynamically based on information such as the source MAC address of the device connected to the port or the username used to log onto that device. As a device enters the network, the switch queries a database for the VLAN membership of the port that ...
With ISL, an Ethernet frame is encapsulated with a header that transports VLAN IDs between switches and routers. With IEEE 802.1Q the tag is internal. This is a key advantage for IEEE 802.1Q as it means tagged frames can be sent over standard Ethernet links. ISL does add overhead to the frame as a 26-byte header containing a 10-bit VLAN ID.
VLAN Classification by Protocol and Port Incorporated into 802.1Q-2003 802.1u-2001 Technical and Editorial corrections for 802.1Q-1998 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into 802.1Q-2003 802.1Q-2003: Virtual Bridged Local Area Networks (Rollup of 802.1Q-1998, 802.1s, 802.1u and 802.1v) Superseded by ...
IEEE 802.3 is a working group and a collection of standards defining the physical layer and data link layer's media access control (MAC) of wired Ethernet. The standards are produced by the working group of the Institute of Electrical and Electronics Engineers (IEEE).
802.1aq is the IEEE-sanctioned link state Ethernet control plane for all IEEE VLANs covered in IEEE 802.1Q. [28] The Shortest Path Bridging virtual local area network identifier (VLAN ID) or Shortest Path Bridging VID (SPBV) provides a capability that is backward compatible with spanning tree technologies. The SPBM provides additional values ...
It is a method of inter-VLAN routing where one router is connected to a switch via a single cable. The router has physical connections to the broadcast domains where one or more VLANs require the need for routing between them. Devices on separate VLANs or in a typical local area network are unable to
STP is based on an algorithm that was invented by Radia Perlman while she was working for Digital Equipment Corporation. [1] [2] In 2001, the IEEE introduced Rapid Spanning Tree Protocol (RSTP) as 802.1w. RSTP provides significantly faster recovery in response to network changes or failures, introducing new convergence behaviors and bridge port ...
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