The Cisco switch must be configured to advertise a hop limit of at least 32 in Switch Advertisement messages for IPv6 stateless auto-configuration deployments.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-237751 | CISC-RT-000236 | SV-237751r648779_rule | CCI-000366 | low |
| 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. | ||||
| STIG | Date | |||
| Cisco IOS Switch RTR Security Technical Implementation Guide | 2024-06-06 | |||
Related Frameworks
4 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
CM-6
1.00
- DISA · 3 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1712 mappings
3.4.1
1.00
- DISA · 3 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
3.4.2
1.00
- DISA · 3 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-000366
1.00
- DISA · 3 · disa_xccdf · related
Details
Check Text (C-237751r648779_chk)
Review the switch configuration to determine if the hop limit has been configured for Router Advertisement messages as shown in the example.
ipv6 hop-limit 128
If hop-limit has been configured and has not been set to at least 32, it is a finding.
Fix Text (F-40932r648778_fix)
Configure the switch to advertise a hop limit of at least 32 in Router Advertisement messages as shown in the example.
SW1(config)#ipv6 hop-limit 128