HP VPN Firewall Appliances VPN Configuration Guide

402
Figure 307 Full mesh DVPN
• Hub-spoke DVPN—In a hub-spoke DVPN, no tunnel can be established between two spokes, and
data between them has to be forwarded through the hub. The hub is used as both the routing
information exchange center and the data forwarding center.
As shown in Figure 308, each spoke establishes a permanent tunnel with the hub, and dat
a
between spokes is forwarded through the hub.
Figure 308 Hub-spoke DVPN
DVPN implementation
DVPN works in three phases: connection initialization, registration, and tunnel establishment.