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Troubleshooting Guide

CloudEngine 16800, 12800, 12800E, 8800, 7800, 6800, and 5800 Series Switches

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What Does Incomplete in an ARP Entry Mean?

What Does Incomplete in an ARP Entry Mean?

If the MAC ADDRESS field of an ARP entry in the display arp command output displays Incomplete, the ARP entry is temporary. When IP packets trigger ARP Miss messages, the switch generates temporary ARP entries based on the ARP Miss messages, and sends ARP request packets to the destination network segment.
  • Within the aging time of the temporary ARP entries:
    • Before the switch receives ARP reply packets, IP packets matching the temporary ARP entries are discarded and do not trigger ARP Miss messages.
    • After the switch receives ARP reply packets, it generates correct ARP entries to replace the temporary ARP entries.
  • If the aging time of the temporary ARP entries expires, the switch clears the temporary ARP entries.
Updated: 2020-01-07

Document ID: EDOC1000060766

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