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Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

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Configuring ARP Retries

In the Dell Networking OS versions prior to 8.3.1.0, the number of ARP retries is set to five and is not configurable. After five retries, the system backs off for 20 seconds before it sends a new request. Beginning with the Dell Networking OS version 8.3.1.0, the number of ARP retries is configurable.

The default backoff interval remains at 20 seconds. On the switch using the Dell Networking OS version 8.3.8.0 and later, the time between ARP re-send is configurable. This timer is an exponential backoff timer. Over the specified period, the time between ARP requests increases. This reduces the potential for the 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 mode arp retries number The default is 5. The range is from 1 to 20.
  • Set the exponential timer for resending unresolved ARPs. CONFIGURATION mode arp backoff-time The default is 30. The range is from 1 to 3600.
  • Display all ARP entries learned via gratuitous ARP. EXEC Privilege mode show arp retries

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