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The Cisco ACI must be configured to advertise a hop limit of at least 32 in Cisco ACI Advertisement messages for IPv6 stateless auto-configuration deployments.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-272100CACI-RT-000040SV-272100r1114112_ruleCCI-000366low
Description
The Neighbor Discovery Protocol allows a hop limit value to be advertised by routers in a router advertisement message being used by hosts instead of the standardized default value. If a very small value was configured and advertised to hosts on the LAN segment, communications would fail due to the hop limit reaching zero before the packets sent by a host reached its destination.
STIGDate
Cisco ACI Router Security Technical Implementation Guide2025-06-18

Related Frameworks

1 mapping across 5 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (8) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

CFG-01Configuration Management Program
1.00
END-01Endpoint Device Management (EDM)
1.00
END-04Malicious Code Protection (Anti-Malware)
1.00
END-06Endpoint File Integrity Monitoring (FIM)
1.00
MON-01Continuous Monitoring
1.00
MON-01.7File Integrity Monitoring (FIM)
1.00
CFG-02Secure Baseline Configurations
0.50
CFG-02.7Approved Configuration Deviations
0.50
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (100) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-12Session Termination
1.00
AC-16(1)Dynamic Attribute Association
1.00
AC-17(1)Monitoring and Control
1.00
AC-2Account Management
1.00
AC-2(1)Automated System Account Management
1.00
AC-2(11)Usage Conditions
1.00
AC-2(3)Disable Accounts
1.00
AC-2(4)Automated Audit Actions
1.00
AC-24(1)Transmit Access Authorization Information
1.00
AC-25Reference Monitor
1.00

+90 more (top 10 by confidence shown)

NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (2) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

3.4.1
1.00
3.4.2
1.00
CCI1 mapping
CCI-000366
1.00
NIST CSF 2.00 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (5) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

DE.CM-09
1.00
PR.PS-01
1.00
PR.DS-10
0.50
PR.PSPlatform Security
0.50
PR.PS-05
0.50

Who does this work

10 NICE work roles and 9 EC-Council certifications.

This is an inference across published mappings, not a single claim by anyone. This check maps to a control, which maps to a Cybersecurity Framework outcome, which NIST assigns to the work roles below. EC-Council separately maps its certifications to those same roles.

A certification prepares someone for a role. It is not evidence that a holder is qualified, and neither NIST nor EC-Council has stated that any certification here addresses this check.

Work-role assignments published by NIST (NICE Framework Components 2.2.0 and the CSF 2.0 OLIR crosswalk). Certification mappings published by EC-Council.

Details

Check Text (C-272100r1114112_chk)

Enter the "show ipv6 int" command on the leaf switch to verify the configuration was pushed out correctly to the leaf switch. interface Ethernet 1/1 ipv6 router advertisement hop-limit 32 If a hop limit of at least 32 is not advertised in Cisco ACI advertisement messages for IPv6 stateless auto-configuration deployments, this is a finding.

Fix Text (F-76057r1114111_fix)

Configure the switch to advertise a hop limit of at least 32 in router advertisement messages as shown in the example. Depending on the ACI configuration, it may be necessary to specify the appropriate context (like a specific VLAN or L3Out) before issuing the command. apic1(config)# interface Ethernet 1/1 apic1(config-if)# ipv6 router advertisement hop-limit 32 Note: When configuring using a VPC interface, the ND RA prefix must be enabled for both side A and side B as both are members in the VPC configuration. Enable the ND RA prefix: 1. In the Work Pane, in the Logical Interface Profile screen, click the SVI tab. 2. Under Properties, click the check boxes to enable the ND RA Prefix for both Side A and Side B. Choose the identical ND RA Prefix Policy for Side A and Side B.