Juniper BGP, Configuration Manual

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forwarding works. The global VPN RIB never contains unlabeled routes, so the issue
is moot for import maps.
When a route that was previously imported into the local VRF RIB is modified in the
global BGP RIB (VPN or non-VPN) such that it no longer matches the import or global
import map, that route is removed from the local VRF RIB.
Imported routes point to the same interface and next hop as the original route. Shared
IP interfaces are not created.
Table 62 on page 428 lists additional characteristics of import and global import maps.
Table 62: Characteristics of Import and Global Import Maps
Global Import Import Characteristic
– Yes Distributes routes from the global BGP VPN RIB local to the VR.
This RIB is often referred to as the core VPN RIB.
Yes – Distributes routes from the global BGP non-VPN RIB local to the
VR. This RIB is often referred to as the core non-VPN RIB or core
RIB.
Yes Yes Imports all types of routes (received routes, redistributed routes,
network routes, aggregate routes, and auto-summary routes).
Yes Yes Imports both best and non-best routes. The best route selection
(including the decision to use or not use ECMP) is made in the VRF
after the routes are imported.
Characteristics of Export and Global Export Maps
Export maps and global export maps can export both labeled and unlabeled routes.
If you want to export only one or the other, you can use a
match mpls-label
command in the export or global export route map.
Table 63 on page 428 lists additional characteristics of export and global export maps.
Table 63: Characteristics of Export and Global Export Maps
Global Export Export Characteristic
– Yes Distributes routes to the global BGP VPN RIB local to the VR. This
RIB is often referred to as the core VPN RIB.
Yes – Distributes routes to the global BGP non-VPN RIB local to the VR.
This RIB is often referred to as the core non-VPN RIB or core RIB.
– Yes Exports all types of routes (received routes, redistributed routes,
network routes, aggregate routes, and auto-summary routes).
Yes – Exports only locally originated routes (all routes other than those
that have been received).
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Configuring BGP VPN Services
JUNOSe 11.1.x BGP and MPLS Configuration Guide