Understanding Virtual Routing And Forwarding Tables - Juniper ACX1000 Configuration Manual

ACX Series Universal Access Router Configuration Guide

Understanding Virtual Routing and Forwarding Tables

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Figure 47: Route Distinguishers
To separate a VPN's routes from routes in the public Internet or those in other VPNs, the
PE router creates a separate routing table for each VPN, called a VPN routing and
forwarding (VRF) table. The PE router creates one VRF table for each VPN that has a
connection to a CE router. Any customer or site that belongs to the VPN can access only
the routes in the VRF tables for that VPN.
Figure 48 on page 819 illustrates the VRF tables that are created on the PE routers. The
three PE routers have connections to CE routers that are in two different VPNs, so each
PE router creates two VRF tables, one for each VPN.
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