STIGQter: STIG Summary: Arista MLS EOS 4.X Router Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 02 Apr 2025:

The MPLS router must be configured to synchronize IGP and LDP to minimize packet loss when an IGP adjacency is established prior to LDP peers completing label exchange.

DISA Rule

SV-256050r882492_rule

Vulnerability Number

V-256050

Group Title

SRG-NET-000512-RTR-000003

Rule Version

ARST-RT-000710

Severity

CAT III

CCI(s)

• CCI-000366 - Implement the security configuration settings.

Weight

10

Fix Recommendation

Configure the Arista MPLS router to synchronize IGP and LDP, minimizing packet loss when an IGP adjacency is established prior to LDP peers completing label exchange.

ISIS configuration example:

P-Router-EOS(config)#router isis 1
P-Router-EOS(config-router-isis)#mpls ldp sync default

OSPF configuration example:

LEAF-1A(config-mpls-ldp)#router ospf 1
LEAF-1A(config-router-ospf)#mpls ldp sync default

Configure LDP to synchronize with the link-state routing protocol.

LEAF-1A(config)#interface Loopback1
LEAF-1A(config-if-Lo0)#erface Loopback1
LEAF-1A(config-if-Lo0)#description MPLS-LDP-Router-ID
LEAF-1A(config-if-Lo0)#ip address 10.1.129.94/32
LEAF-1A(config-if-Lo0)#mpls ldp igp sync
LEAF-1A(config-if-Lo0)#ip ospf area 0.0.0.5

Check Contents

Review the Arista router OSPF or IS-IS configuration.

ISIS configuration example:

router isis 1
mpls ldp sync default

OSPF configuration example:

router ospf 1
mpls ldp sync default

Verify LDP will synchronize with the link-state routing protocol.

interface Loopback1
description MPLS-LDP-Router-ID
ip address 10.1.129.94/32
mpls ldp igp sync
ip ospf area 0.0.0.5

If the Arista router is not configured to synchronize IGP and LDP, this is a finding.

Vulnerability Number

V-256050

Documentable

False

Rule Version

ARST-RT-000710

Severity Override Guidance

Review the Arista router OSPF or IS-IS configuration.

ISIS configuration example:

router isis 1
mpls ldp sync default

OSPF configuration example:

router ospf 1
mpls ldp sync default

Verify LDP will synchronize with the link-state routing protocol.

interface Loopback1
description MPLS-LDP-Router-ID
ip address 10.1.129.94/32
mpls ldp igp sync
ip ospf area 0.0.0.5

If the Arista router is not configured to synchronize IGP and LDP, this is a finding.

Check Content Reference

M

Target Key

5513