ARST-RT-000480 - The PE router providing MPLS Layer 2 Virtual Private Network (L2VPN) services must be configured to authenticate targeted Label Distribution Protocol (LDP) sessions used to exchange virtual circuit (VC) information using a FIPS-approved message authentication code algorithm.

Information

LDP provides the signaling required for setting up and tearing down pseudowires (virtual circuits used to transport Layer 2 frames) across an MPLS IP core network. Using a targeted LDP session, each PE router advertises a virtual circuit label mapping that is used as part of the label stack imposed on the frames by the ingress PE router during packet forwarding. Authentication provides protection against spoofed TCP segments that can be introduced into the LDP sessions.

Solution

Implement authentication for all targeted LDP sessions using a FIPS-approved message authentication code algorithm.

Step 1: Configure the mpls LDP on the Arista MLS.

PE11(config)#mpls ldp
PE11(config-mpls-ldp)#router-id interface Loopback0
PE11(config-mpls-ldp)#no shutdown

Step 2: Enable the authentication for LDP neighbors.

PE11(config-mpls-ldp)#password 0 xxxxx

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Arista_MLS_EOS_4-2x_Y24M07_STIG.zip

Item Details

Category: IDENTIFICATION AND AUTHENTICATION

References: 800-53|IA-3, CAT|II, CCI|CCI-001958, Rule-ID|SV-256028r882426_rule, STIG-ID|ARST-RT-000480, Vuln-ID|V-256028

Plugin: Arista

Control ID: 07f15bd179777716eb47b4d59d588aa1d2081e7ace372f5aef12a226e734db68