Troubleshooting Tip: Bandwidth utilization issues

FortiGate

FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.

Article Id 193891

Description

This article describes how to troubleshoot bandwidth issues and detect which host consumes the most bandwidth.

Scope

FortiGate.

Solution

To check the interface bandwidth utilization, go to Dashboard -> Status -> Add widget -> Interface Bandwidth -> Specify Interface -> Add widget.

The chart shows the selected interface's real-time incoming and outgoing traffic bandwidth.

To check the highest bandwidth utilization by source, go to Dashboard -> FortiView Sources -> Sort by Bytes.

Ensure that logging is enabled on the firewall policies by going to Policy & Objects -> Firewall Policy -> Select Firewall policy -> Edit, enable logging by enabling Log allowed traffic.

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