The Arista router must be configured to advertise a hop limit of at least 32 in Router Advertisement messages for IPv6 stateless auto-configuration deployments.
An XCCDF Rule
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.
- ID
- SV-256057r882513_rule
- Version
- ARST-RT-000780
- Severity
- Low
- References
- Updated
Remediation Templates
A Manual Procedure
This requirement is not applicable for the DODIN backbone.
Configure the Arista router to advertise a hop limit of at least 32 in Router Advertisement messages.
LEAF-1A(config-if-Et3)#interface ethernet 3
LEAF-1A(config-if-Et3)#ipv6 nd ra hop-limit 32