The Nokia Provider Edge (PE) router must be configured to have each Virtual Routing and Forwarding (VRF) instance bound to the appropriate physical or logical interfaces to maintain traffic separation between all Multiprotocol Label Switching (MPLS) layer 3 virtual private networks (L3VPNs).
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-283843 | NOKI-RT-000250 | SV-283843r1203778_rule | CCI-000366 | high |
| Description | ||||
| 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. | ||||
| STIG | Date | |||
| Nokia Service Router OS 25.x Router Security Technical Implementation Guide | 2026-06-15 | |||
Details
Check Text (C-283843r1203778_chk)
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.
Fix Text (F-88313r1203777_fix)
Configure the PE router to have each VRF bound to the appropriate physical or logical interfaces to maintain traffic separation between all MPLS L3VPNs.
Add appropriate physical and logical interfaces to each MPLS L3VPN service, as shown in the example below:
- configure service vprn 30 customer 1 create
- config>service>vprn# interface "TO-CE" create
- config>service>vprn>if# address 172.200.x.x/30
- config>service>vprn>if# sap 1/1/c3/1 create
- config>service>vprn>if>sap# exit
- config>service>vprn>if# exit
- config>service>vprn#