Technical Tip: Reducing CPU utilization by network detection daemon

[VinayHM]

Description	This article describes how to reduce CPU utilization by network detection daemon.
Scope	FortiGate.
Solution	The daemon is CID (Client Identification daemon). This daemon is used for device detection, and it helps in Internet of Things detection. The CID process is 'Device Identification daemon'. It is enabled by default on all interfaces with 'set role lan'. Disabling the device detection, the resource CPU will be released by the CID daemon. To check if device detection is enabled, refer to this related KB article: Technical Tip: Enable 'Device Detection' to allow FortiOS to monitor networks. To get more logs with this daemon, run the below commands: diagnose sys top <refresh interval> <max # of lines> <iterations> Process information: diag sys process pidof cid For each process, collect the outputs of: diag sys process dump < pid > diag sys process pstack < pid > diag sys process trace < pid > Debug CID: diag deb application cid -1 diag deb console timestamp enable diag deb enable Leave it running for 1 minute. diag deb reset diag deb disable