Technical Tip: How to control Discovered Device Timeout for Device Monitoring

[gcortes1]

Description
This article describes how to control Discovered Device Timeout for Device Monitoring. The FortiGate unit can monitor networks and gather information about the devices operating on those networks. Collected information includes:

    1) MAC address
    2) IP address
    3) operating system
    4) hostname
    5) user name
    6) how long the device has been detected and on which FortiGate interface

Devices that were automatically discovered by FortiGate will expire in 28 days by default if FortiGate does not see the device in the network anymore.
Scope


Solution
The expiration timer can be changed using the commands below:

# config system settings
    set discovered-device-timeout 28 <1-365 days>
end

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Variable:

discovered-device-timeout
<days_int>

Description:

Enter the timeout for discovered devices. Range:
1 to 365 days.

Default:

28