Figure 50. ARP Learning via ARP RequestBeginning with Dell Networking OS version 8.3.1.0, when you enable ARP learning via gratuitous ARP, the system installs a new ARP entry,or updates an existing entry for all received ARP requests.Figure 51. ARP Learning via ARP Request with ARP Learning via Gratuitous ARP EnabledWhether you enable or disable ARP learning via gratuitous ARP, the system does not look up the target IP. It only updates the ARP entryfor the Layer 3 interface with the source IP of the request.Configuring ARP RetriesYou can configure the number of ARP retries.The default backoff interval remains at 20 seconds. On the device, the time between ARP resend is configurable. This timer is anexponential backoff timer. Over the specified period, the time between ARP requests increases. This time increase reduces the potential forthe system to slow down while waiting for a multitude of ARP responses.To set and display ARP retries, use the following commands.• Set the number of ARP retries.CONFIGURATION modearp retries numberThe default is 5.The range is from 1 to 20.• Set the exponential timer for resending unresolved ARPs.444 IPv4 Routing
