V-283843

Discussion

The primary security model for an MPLS L3VPN infrastructure is traffic separation. The service provider must guarantee the customer that traffic from one VPN does not leak into another VPN or into the core and that core traffic does not leak into any VPN. Hence, it is imperative that each CE-facing interface is associated to only one VRF. This alone is the fundamental framework for traffic separation.

Check Content

Review the design plan for deploying L3VPN and VRF-lite. 

Review all CE-facing interfaces and verify the proper VRF is defined.

Use the command below and verify CE-facing interfaces and the physical ports:

- show router 30 interface "TO-CE"

Interface Table (Service: 30)

Interface-Name                   Adm       Opr(v4/v6)  Mode    Port/SapId
   IP-Address                                                  PfxState
-------------------------------------------------------------------------------
TO-CE                         Up        Up/Down     VPRN    1/1/c3/1
   172.200.200.1/30                                            n/a
-------------------------------------------------------------------------------
Interfaces : 1

If any VRFs are not bound to the appropriate physical or logical interface, this is a finding.