The Dell OS10 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-269902r1052091_rule
- Version
- OS10-RTR-001020
- Severity
- Low
- References
- Updated
Remediation Templates
A Manual Procedure
Configure each IPv6 interface to advertise a hop limit of at least 32 in Router Advertisement messages as in the example below.
OS10(config)# interface ethernet 1/1/4
OS10(conf-if-eth1/1/4)# ipv6 nd send-ra
OS10(conf-if-eth1/1/4)# ipv6 nd hop-limit 32