The Dell OS10 Router must be configured to have Gratuitous ARP disabled on all external interfaces.
An XCCDF Rule
Description
A gratuitous ARP is an ARP broadcast in which the source and destination MAC addresses are the same. It is used to inform the network about a host IP address. A spoofed gratuitous ARP message can cause network mapping information to be stored incorrectly, causing network malfunction.
- ID
- SV-269887r1052046_rule
- Version
- OS10-RTR-000620
- Severity
- Medium
- References
- Updated
Remediation Templates
A Manual Procedure
Configure the Dell OS10 Switch to disable gratuitous arp on all external interfaces as shown in the example below:
OS10(config)# interface ethernet 1/1/1
OS10(conf-if-eth1/1/1)# no ip arp gratuitous update