OPNsense Forum

English Forums => 26.1 Series => Topic started by: Sisko on March 03, 2026, 10:08:58 AM

Title: 10%-30% packet loss on uploading of data only
Post by: Sisko on March 03, 2026, 10:08:58 AM
Hello,

I am using a custom appliance (Qotom) /w Intel NICs (2.5G) using an Intel Denverton chipset - Bare Metal install. Never had issues with upload or download packets getting dropped until recently. Just noticed as I started to get worse scores on the bufferbloat test over at Waveform.

Now when I do this:

ping google.com -f -l 1472

I get back 4 responses and usually 1-2 of those 4 don't make it back. The two that make it back are what they should be, about less than 20 ms.

When I play Marvel Rivals or Fortnite and use both of their network diag tools, I can see that only the upload is being affected. My download is rock solid on both. I see levels as low as 1-3%, yet up to 50% a few times.

If I use a software VPN and encapsulate all of the traffic on the PC running those games, then I get almost no packet loss on my uploads.

My first upgrade to v26 was a disaster. Worked for less than 24 hrs then woke up to a failing to boot router. Rebuilt it using the old config, upgraded to v26 and migrated to the new rules.

I'm using this appliance bridged /w x5 2.5G ports, one being WAN plus 4 SPF+ ports of which x2 I use for a 10G/SR Fiber connection back to my Mini PC running Proxmox for a homelab. The router is an Intel 8C/8T CPU, so it has plenty of resources on a 32GB Optane SSD /w 32GB of DDR4 RAM. I ordered 5x 16GB sticks of Optane SSD sticks and this appliance has the ability to RAID x2 of them, so I am planning on a RAID 1 rebuild soon.

I also recently replaced my ISP's cable modem /w a Netgear CM2000 which meets and exceeds the specs of the ISP's modem.

I appreciate any help pointing me in the right direction of what to check for.

TIA
Title: Re: 10%-30% packet loss on uploading of data only
Post by: connervt on March 03, 2026, 02:47:53 PM
Quote from: Sisko on Today at 10:08:58 AMI also recently replaced my ISP's cable modem /w a Netgear CM2000 which meets and exceeds the specs of the ISP's modem.

I would start here.  Plug your modem directly into a known good computer and test.

When troubleshooting, I have always been from the school of "What was the last thing changed?"
Title: Re: 10%-30% packet loss on uploading of data only
Post by: nero355 on March 03, 2026, 04:47:39 PM
Quote from: Sisko on Today at 10:08:58 AMI ordered 5x 16GB sticks of Optane SSD sticks and this appliance has the ability to RAID x2 of them, so I am planning on a RAID 1 rebuild soon.
You are probably better off with a Software RAID1/OpenZFS Mirror in order to keep the T.R.I.M. commands working correctly !!

Most Intel SSD's have very decent Garbage Collection performance, but still : Avoid Hardware RAID or any kind of "Chipset RAID" coming from the Motherboard or it's BIOS/UEFI ;)