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JunosE 11.2.x BGP and MPLS Configuration Guide
Hub-and-Spoke VPNs
410
Figure 82: Site Connectivity in a Full-Mesh VPN
Figure 83 on page 410 illustrates how you can configure the VRF import and export route
targets to build a full-mesh VPN. Each VRF in VPN A has the same route target, 100:10,
in their import list and export list. Each VPN A VRF accepts only received routes that have
this route target attached. Because this route target is attached to each route advertised
by VPN A VRFs, every site in VPN A accepts routes only from other sites in VPN A. The
same principle applies to VPN B.
Figure 83: Route Target Configuration for a Full-Mesh VPN
In a hub-and-spoke VPN, the spoke sites in the VPN can communicate only with the hub
sites; they cannot communicate with other spoke sites, as shown in Figure 84 on page 411.
Copyright © 2010, Juniper Networks, Inc.
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