Chapter 10. Provider Edge (PE) to Customer Edge (CE) Connectivity Options
VPN Customer Access into the MPLS/VPN Backbone
We have seen in previous chapters how VPN customer routes are propagated around an MPLS/VPN backbone network, through the use of MP-BGP. These routes are taken from VPN routing and forwarding instances (VRFs), with which customer sites are associated. The population of these forwarding tables is achieved through advertisement of VPN routes across the backbone network, as discussed in Chapter 9, "MPLS/VPN Architecture Operation," and also from the receipt of routing updates from attached customers (or through static routing).
There are currently four separate ways that an MPLS/VPN backbone can receive routes from a VPN customer ...
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