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1: Dealing with Routes within a Junos OS... > 1.2 RIB Route Advertisement at MPLS ...

1.2 RIB Route Advertisement at MPLS Layer 3 VPNs

For a PE router in the MPLS L3VPN architecture, the routing information that populates its local VRFs and which is learned from remote PE routers has to be advertised to the CEs. The advertisement can be achieved in Junos OS using a configuration similar to that for the main routing instance, but constrained to the specific VRF configuration block. Configuring protocols within a routing-instance constrains the route advertisements to the VRF.

Conversely, the routing information advertised by the CE must be propagated from the PE-CE connection to the MPLS L3VPN cloud by the PE router, which does so performing proper NLRI conversion to include the VPN Label and RD information, eventually tagging the NLRI with RTs.


  

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