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Title : VPLS Extensions for Provider Backbone Bridging
Author(s) : F. Balus, et al.
Filename : draft-balus-l2vpn-vpls-802.1ah-01.txt
Pages : 15
Date : 2007-7-10
IEEE 802.1ah draft standard [IEEE802.1ah], also known as Provider
Backbone Bridges (PBB) defines an architecture and bridge protocols
for interconnection of multiple Provider Bridge Networks (PBNs). PBB
was defined in IEEE as a connectionless technology based on
multipoint VLAN tunnels. MSTP is used as the core control plane for
loop avoidance and load balancing. As a result, the coverage of the
solution is limited by STP scale in the core of large service
provider networks.
Virtual Private LAN Service (VPLS) [RFC4762] provides a solution for
extending Ethernet LAN services, using MPLS tunneling capabilities,
through a routed MPLS backbone without running (M)STP across the
backbone. As a result, VPLS has been deployed on a large scale in
service provider networks.
This draft discusses extensions to the VPLS model required to
incorporate desirable PBB components while maintaining the Service
Provider fit of the initial model.
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