STIGQter STIGQter: STIG Summary: Cisco NX-OS Switch RTR Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 23 Apr 2021:

The Cisco PE switch must be configured to have each Virtual Routing and Forwarding (VRF) instance with the appropriate Route Target (RT).

DISA Rule

SV-221118r622190_rule

Vulnerability Number

V-221118

Group Title

SRG-NET-000512-RTR-000006

Rule Version

CISC-RT-000640

Severity

CAT I

CCI(s)

Weight

10

Fix Recommendation

Configure the switch to have each VRF instance defined with the correct RT.

SW1(config)# vrf context CUST1
SW1(config-vrf)# address-family ipv4 unicast
SW1(config-vrf-af-ipv4)# route-target import 13:13
SW1(config-vrf-af-ipv4)# route-target export 13:13
SW1(config-vrf-af-ipv4)# end

Check Contents

Review the design plan for MPLS/L3VPN to determine what RTs have been assigned for each VRF. Review the switch configuration and verify that the correct RT is configured for each VRF. In the example below, route target 13:13 has been configured for customer 1.

vrf context CUST1
address-family ipv4 unicast
route-target export 13:13
route-target import 13:13

If there are VRFs configured with the wrong RT, this is a finding.

Vulnerability Number

V-221118

Documentable

False

Rule Version

CISC-RT-000640

Severity Override Guidance

Review the design plan for MPLS/L3VPN to determine what RTs have been assigned for each VRF. Review the switch configuration and verify that the correct RT is configured for each VRF. In the example below, route target 13:13 has been configured for customer 1.

vrf context CUST1
address-family ipv4 unicast
route-target export 13:13
route-target import 13:13

If there are VRFs configured with the wrong RT, this is a finding.

Check Content Reference

M

Target Key

4075

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