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

The 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 MPLS L3VPNs.

DISA Rule

SV-256052r991791_rule

Vulnerability Number

V-256052

Group Title

SRG-NET-000512-RTR-000005

Rule Version

ARST-RT-000730

Severity

CAT I

CCI(s)

• CCI-004931 - Establish organization-defined alternate communications paths for system operations organizational command and control.

Weight

10

Fix Recommendation

Configure the Arista PE router to have each VRF bound to the appropriate physical or logical interfaces to maintain traffic separation between all MPLS L3VPNs.

Configure the VRF on the CE facing interfaces.

PE11(config)#vrf instance PROD
PE11(config)#vrf instance DEVP
!
PE11(config)#ip routing vrf PROD
PE11(config)#ip routing vrf DEVP
!
PE11(config)#interface Ethernet3
PE11(config-if-Et3)#no routerport
PE11(config-if-Et3)#vrf PROD
PE11(config-if-Et3)#ip address 10.1.99.11/24
!
PE11(config)#interface Ethernet4
PE11(config-if-Et3)#no routerport
PE11(config-if-Et3)#vrf DEVP
PE11(config-if-Et3)#ip address 10.11.5.11/24

Check Contents

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

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

To verify the interfaces toward CE facing with proper VRF defined, execute the command "sh run int ethernet YY".

vrf instance PROD
vrf instance DEVP

ip routing vrf PROD
ip routing vrf DEVP

interface Ethernet3
no routerport
vrf PROD
ip address 10.1.99.11/24

interface Ethernet4
no routerport
vrf DEVP
ip address 10.11.5.11/24

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

Vulnerability Number

V-256052

Documentable

False

Rule Version

ARST-RT-000730

Severity Override Guidance

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

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

To verify the interfaces toward CE facing with proper VRF defined, execute the command "sh run int ethernet YY".

vrf instance PROD
vrf instance DEVP

ip routing vrf PROD
ip routing vrf DEVP

interface Ethernet3
no routerport
vrf PROD
ip address 10.1.99.11/24

interface Ethernet4
no routerport
vrf DEVP
ip address 10.11.5.11/24

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

Check Content Reference

M

Target Key

5513