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The general concept of virtual LANs. ... (VLAN) is any broadcast ... This was extended with IEEE 802.1ad to allow nested VLAN tags in service of provider bridging.
IEEE 802.1ad introduced the concept of double tagging. Double tagging can be useful for Internet service providers (ISPs), allowing them to use their VLANs internally while carrying traffic from clients that is already VLAN tagged. The outer (next to source MAC and representing ISP VLAN) S-TAG (service tag) comes first, followed by the inner C ...
A Private VLAN divides a VLAN (Primary) into sub-VLANs (Secondary) while keeping existing IP subnet and layer 3 configuration. A regular VLAN is a single broadcast domain, while private VLAN partitions one broadcast domain into multiple smaller broadcast subdomains. Primary VLAN: Simply the original VLAN. This type of VLAN is used to forward ...
The idea is to provide, for example, the possibility for customers to run their own VLANs inside a service provider's provided VLAN. This way the service provider can just configure one VLAN for the customer and the customer can then treat that VLAN as if it were a trunk. IEEE 802.1ad was created for the following reasons: 802.1Q has a 12-bit ...
IEEE 802.1Q describes VLANs, and IEEE 802.1X defines a port-based network access control protocol, which forms the basis for the authentication mechanisms used in VLANs [60] (but it is also found in WLANs [61]) – it is what the home user sees when the user has to enter a "wireless access key".
Quality of service (QoS) is the ... VLAN IEEE 802.1Q and IEEE 802.1p can be used to distinguish between Ethernet frames and classify them. Queueing theory models have ...
One implementation of this concept is a private VLAN. Another implementation is possible with Linux and iptables. One analogy is that by creating multiple VLANs, the number of broadcast domains increases, but the size of each broadcast domain decreases. This is because a VLAN defines a broadcast domain.
Hierarchical VLAN is a proposed extension to VLAN which, like PBB and PBT, turns cost-efficient Ethernet into a flexible, carrier-grade transport technology. Unlike other technologies, HVLAN uses the mature VLAN functionality to support all connectivity schemes: point-to-point, point-to-multipoint, and multipoint-to-multipoint.