Figure 102: Fallback Global Option - Juniper JUNOSE SOFTWARE FOR E SERIES 11.0.X - BGP AND MPLS CONFIGURATION GUIDE 2009-12-30 Configuration Manual

JUNOSe 11.0.x BGP and MPLS Configuration Guide

Figure 102: Fallback Global Option

If BGP finds a route in the VRF context, it uses that route. If BGP does not find a route
in the VRF context but does find a route in the VR context, it falls back on the global
route in the parent VR. BGP drops the packet if it does not find a route in either
context.
To enable fallback global on a PE-CE IP interface:
See "Defining Secondary Routing Table Lookup" on page 428 for more information.
Configuring a Global Import Map for Specific Routes
For the third solution you create a global import map to import only the specific
routes needed to reach the desired small number of networks in the Internet. See
Figure 103 on page 459.
458
Providing Internet Access to and from VPNs
host1:pe1(config)#interface atm2/0.11
host1:pe1(config-if)#ip vrf forwarding pe11 fallback global
host1:pe1:pe11(config-if)#atm pvc 11 0 11 aal5snap
host1:pe1:pe11(config-if)#ip address 10.11.11.1 255.255.255.0
host1:pe1:pe11(config-if)#exit