The Cisco perimeter switch must be configured to suppress Router Advertisements on all external IPv6-enabled interfaces.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-237759 | CISC-RT-000391 | SV-237759r648792_rule | CCI-000366 | medium |
| Description | ||||
| Many of the known attacks in stateless autoconfiguration are defined in RFC 3756 were present in IPv4 ARP attacks. To mitigate these vulnerabilities, links that have no hosts connected such as the interface connecting to external gateways must be configured to suppress router advertisements. | ||||
| STIG | Date | |||
| Cisco IOS XE Switch RTR Security Technical Implementation Guide | 2025-05-20 | |||
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-237759r648792_chk)
This requirement is not applicable for the DODIN Backbone.
Review the switch configuration to verify that Router Advertisements are suppressed on all external IPv6-enabled interfaces as shown in the example below.
interface gigabitethernet1/0
ipv6 address 2001::1:0:22/64
ipv6 nd ra suppress
If the switch is not configured to suppress Router Advertisements on all external IPv6-enabled interfaces, this is a finding.
Fix Text (F-40936r648790_fix)
Configure the switch to suppress Router Advertisements on all external IPv6-enabled interfaces as shown in the example below.
SW1(config)#int g1/0
SW1(config-if)#ipv6 nd ra suppress
SW1(config-if)#end