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Technical Tip: How to display the ARP table on a FortiGate, configured in NAT mode

Description

This article describes how to display the ARP table on a FortiGate, configured in NAT mode.

Scope

FortiGate.

Solution

When VDOMs are not enabled:

get system arp

Below is shown the output after executing the above command:

When VDOMs are enabled:

config vdom
edit root
get system arp

Below is shown the output after executing the above commands:

The sniffer command below can be used to capture the ARP frames on a specific interface.

diagnose sniffer packet <interface_name> "arp" 6 0 l

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