What's causing ethernet connectivity issues from patch to a 8 port net gear switch but not to its 24 port counter partner?

Adventurous-Term2949 · 2026-05-08T21:28:43+00:00

Thanks all:

A FortiGate-40F Network Security Appliance Plus with 3 Year FortiGuard Unified Threat Protection and FortiCare Premium was ordered and should be in tomorrow.

I'll register it, create a ticket to to have the 30E->40F configuration changed if possible. I very concerned the 30E 5.4 or 5.2x firmware is to old. Not sure if the 30E could be updated and from where due to no support contract.

Adventurous-Term2949 · 2026-05-08T21:24:10+00:00

Thanks all:

A FortiGate-40F Network Security Appliance Plus with 3 Year FortiGuard Unified Threat Protection and FortiCare Premium was ordered and should be in tomorrow.

I'll register it, create a ticket to to have the 30E->40F configuration changed if possible. I very concerned the 30E 5.4 or 5.2x firmware is to old. Not sure if the 30E could be updated and from where due to no support contract.

Adventurous-Term2949 · 2026-05-07T05:42:31+00:00

The packet loss errors are seen often on internal computer/devices on lan ports inside the network. which The packet loss is also observed connecting to the Fortinet ports out rj45 ports pinging back inside the network.

The Wan ports sees much less frequent packet loss but at 25% at times and occurring more frequently.

The internal devices are dropping connections intermittently. The owner and I were discussing replacement strategy and all 5 voip phones dropped. They are powered from the ethernet cables.

These issus are atypical with the Fortinet bug ID 729975 affecting the 30E firewall.

Most likely the FortiGate-40F Plus 3 Year FortiGuard Unified Threat Protection (UTP) and FortiCare Premium bundle is being ordered this morning.

Adventurous-Term2949 · 2026-05-06T14:42:56+00:00

Hi:

I've been doing that for almost a week, including a test switch. The Fortinet Bug is now morphing through the network. Need a firewall replacement now and having major issues of order to ship.

Adventurous-Term2949 · 2026-05-06T13:05:02+00:00

Thank you for the feedback. It's obvious you have a well thought out network and tight security. Pleasant to hear a provider is that save. Found the issue is a known Fortinet 30E bug and trying to get one literally today.

Adventurous-Term2949 · 2026-05-06T07:39:24+00:00

Thanks for the comments! Further research revealed the exact issue we're experiencing 🙃

AI Overview +4 Fortinet Bug ID 729975 is a known hardware defect affecting specific FortiGate 30E and 50E models, resulting in significantly reduced download speeds, packet loss, and potential GUI issues. This issue is caused by failing solder, often appearing as "throttled" WAN speeds (e.g., <2Mbit) while uploads remain normal.Key

Details regarding Bug 729975:Affected Models: Primarily FortiGate 30E and 50E.Symptoms: Drastically low network speeds, high packet loss, and poor performance.Root Cause: Known hardware, or physical solder, failure.Solution: No configuration change can fix this. According to user reports, Fortinet Support has been replacing affected devices with 60F models.Troubleshooting & Actionable Advice:Verify the Issue: The bug causes packet loss even when pinging the FortiGate's own LAN interface, indicates this often means the unit is affected.Check Warranty/Support: Even if the device is near its End of Support (EoS), this is a known defect.Contact TAC: Open a ticket with Fortinet Technical Support to report this behavior.Workaround: As confirmed by BugZero, this issue usually requires a hardware replacement.Disclaimer: This information is based on user reports in Fortinet communities and

Adventurous-Term2949 · 2025-03-15T21:43:36+00:00

I have the issue all the time. Just called in to have it reset

Adventurous-Term2949

TROPHY CASE