This example shows how to configure a generic routing encapsulation (GRE) tunnel interface between PE routers to provide VPN connectivity. You can use this configuration to tunnel VPN traffic across a non-MPLS core network. The network topology used in this example is shown in Figure 30. The P routers shown in this illustration do not run MPLS.
Figure 30: PE Routers A and D Connected by a GRE Tunnel Interface
For configuration information, see the following sections:
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