H3C S5830V2 series, Руководство по настройке, Страница: 245 / 318

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Configuring PBB
Overview
IEEE 802.1ah Provider Backbone Bridge (PBB) is a MAC-in-MAC Layer 2 VPN technology. It
interconnects multiple provider bridged networks to build a large-scale end-to-end Layer 2 provider
bridged network.
PBB network model
As shown in Figure 64 , the PBB network includes backbone edge bridges and backbone core bridges.
Backbone edge bridges connect customer sites or provider bridge networks to the PBB network. They
encapsulate the customer MAC in the service provider MAC. Backbone core bridges forward traffic
based on the service provider MAC.
Figure 64 Typical PBB network
Terminology
PBBN
A network using PBB is a provider backbone bridge network (PBBN). A PBBN is a Layer 2 switching
network where Layer 2 connections are established between different nodes.