Troubleshooting Tip: Packet loss with Starlink GEN2 as WAN router connected in any FortiGate interface

[edomi]

Description	This article describes how to handle a packet loss issue when Starlink GEN2 is directly connected to FortiGate.
Scope	All FortiGate versions
Solution	If Starlink is directly connected to any WAN1/WAN2/DMZ/any internal FortiGate ethernet interface using the Starlink ethernet adapter, packet loss may be observed. To configure Starlink with FortiGate, refer to Technical Tip: Deploy the Starlink router as WAN for the FortiGate with the default LAN subnet (192..... The packet loss issue has been reported frequently and has been investigated internally by our R&D team and it was determined that there is a Physical compatibility issue in Starlink GEN2 adaptors. This issue is reported by other vendors as well. There are two workarounds found and used so far: Use 100M speed instead of 1G. This can be done by editing the WAN interface in the CLI:   Add a switch device between FortiGate and Starlink adapter. Even a 'dumb' non-managed switch will work. Note: Not all switches may work. Try different ones. This issue has been reported by multiple users and vendors: https://www.reddit.com/r/Starlink_Support/comments/vypze3/starlink_gen2_compatibility_issue_with_3rd... https://forum.peplink.com/t/throughput-issues-when-connecting-to-a-starlink-gen-2-router/41293 https://community.tp-link.com/en/home/forum/topic/563220 To troubleshoot packet loss on a FortiGate device,consult the following articles: Troubleshooting Tip: First steps to troubleshoot connectivity problems to or through a FortiGate wit... Troubleshooting Tip: Diagnose Packet Loss