5 VPN routing forwarding instance, routing and routing objective distinction between the concept of character VPN IP routing table and associated VPN IP forwarding is referred to as VPN routing and forwarding instance. In extreme cases, can be connected to the PE router is assigned a VRF for each site to store VPN routes, but the PE router connected to the same site on the following three conditions are met, you can share a VRF: The site is with a VPN; routing information is the same; direct communication between sites to allow each other. Usually PE router port for each user associated with a particular VRF, the VPN port input from the group will find their corresponding VRF VPN label and its exports to the next hop PE router address. VRF isolation of the different VPN.
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