Check DHCP logs for IP Address Assignmen...

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Article Id 270049

Description

This article describes where to see DHCP logs when a certain IP is reserved for a certain MAC address.

Scope

FortiGate.

Solution

Whenever an IP is reserved for a certain MAC address under the advanced setting of the DHCP server available under the physical interface setting, it is possible to see the logs related to it in System Events logs with the message like 'Edit system.dhcp.server'.

In the given example, 192.168.1.10 IP has been reserved for 01:02:03:04:05:06 MAC address:

CLI reference:

config system dhcp server
edit 2
set dns-service default
set default-gateway 192.168.1.1
set netmask 255.255.255.0
set interface "port2"
config ip-range
edit 1
set start-ip 192.168.1.2
set end-ip 192.168.1.254
next
end
config reserved-address
edit 1
set ip 192.168.1.10
set mac 01:02:03:04:05:06
next
end
next
end

It is possible to see the log related to it under Logs and Report -> System events:

It is possible to expand this log and see the contents:

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Technical Tip: Check DHCP logs for IP Address Assignment Rules

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