Ieee 802.1Ah Provider Backbone Bridging (Pbb) Overview; Ieee 802.1Ah Provider Backbone Bridging - Alcatel-Lucent 7750 SR Manual

IEEE 802.1ah Provider Backbone Bridging (PBB) Overview

IEEE 802.1ah Provider Backbone Bridging (PBB) Overview
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 - IEEE802.1ad QinQ networks). PBB is defined in IEEE as a connectionless
technology based on multipoint VLAN tunnels. IEEE 802.1ah employs Provider MSTP 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), RFC 4762, Virtual Private LAN Service (VPLS) Using Label
Distribution Protocol (LDP) Signaling, provides a solution for extending Ethernet LAN services
using MPLS tunneling capabilities through a routed, traffic-engineered MPLS backbone without
running (M)STP across the backbone. As a result, VPLS has been deployed on a large scale in
service provider networks.
Alcatel-Lucent's implementation fully supports a native PBB deployment and an integrated PBB-
VPLS model where desirable PBB features such as MAC hiding, service aggregation and the
service provider fit of the initial VPLS model are combined to provide the best of both worlds.
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