CISC-RT-000670 - The Cisco PE router providing MPLS Virtual Private Wire Service (VPWS) must be configured to have the appropriate pseudowire ID for each attachment circuit - xconnect group

Information

VPWS is an L2VPN technology that provides a virtual circuit (aka pseudowire) between two PE routers to forward Layer 2 frames between two customer-edge routers or switches through an MPLS-enabled IP core. The ingress PE router (virtual circuit head-end) encapsulates Ethernet frames inside MPLS packets using label stacking and forwards them across the MPLS network to the egress PE router (virtual circuit tail-end). During a virtual circuit setup, the PE routers exchange label bindings for the specified pseudowire ID. The pseudowire ID specifies a pseudowire associated with an ingress and egress PE router and the customer-facing attachment circuits.

To guarantee that all frames are forwarded onto the correct pseudowire and to the correct customer and attachment circuits, it is imperative that the correct pseudowire ID is configured for each attachment circuit.

Solution

Assign globally unique pseudowire IDs for each virtual circuit and configure the attachment circuits with the appropriate pseudowire ID.

RP/0/0/CPU0:R3(config)#l2vpn
RP/0/0/CPU0:R3(config-l2vpn)#xconnect group COI1
RP/0/0/CPU0:R3(config-l2vpn-xc)#p2p COI1-S1-S2
RP/0/0/CPU0:R3(config-l2vpn-xc-p2p)#interface g0/0/0/1
RP/0/0/CPU0:R3(config-l2vpn-xc-p2p)#neighbor 10.1.12.4 pw-id 55

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Cisco_IOS-XR_Router_Y24M07_STIG.zip

Item Details

Category: CONTINGENCY PLANNING

References: 800-53|CP-8, CAT|I, CCI|CCI-004931, Rule-ID|SV-216795r991942_rule, STIG-ID|CISC-RT-000670, STIG-Legacy|SV-105935, STIG-Legacy|V-96797, Vuln-ID|V-216795

Plugin: Cisco

Control ID: fdf9d3204c657614fbb3f12880eafa6b10b4f346f8a32c1b3cb9da86023691ca