R0106-HP MSR Router Series Layer 3 - IP Services Configuration Guide(V7)

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Figure 129 Full mesh ADVPN
• Hub-spoke— In a hub-spoke ADVPN, spokes communicate with each other through the hub. The
hub acts as both the route exchange center and data forwarding center.
As shown in Figure 130, eac
h spoke establishes a permanent tunnel to the hub. Spokes
communicate with each other through the hub.
Figure 130 Hub-spoke ADVPN
• Hub-group—A hub-group ADVPN can accommodate more ADVPN clients. This structure solves the
problem that one hub cannot manage all clients, for example, because of a routing protocol's limit
to neighbors. As shown in Figure 131, a h
u
b-group ADVPN contains multiple hub groups. Each hub
group has one or multiple hubs and spokes.
Use the following guidelines to classify hub groups: