Troubleshooting Tip: VoIP audio issues due to packet loss
| Description | This article describes how to resolve VoIP audio issues caused by packet loss while using FortiGate. |
| Scope | FortiGate v7.4, v7.2, v6.4. |
| Solution | If packet loss is causing VoIP audio issues and/or registration issues while using DoS policies, use the following command to see if VoIP trunk or PBX appears in the command output or in the anomaly logs:
diag ips anomaly list
The reason this occurs is because UDP VoIP uses a lot of UDP packets. This can create a false positive due to the number exceeding the default DoS policy threshold and dropping important VoIP packets.
For example:
To fix the issue, increase the UDP thresholds in the DoS policies.
For example:
Related documents: |
