10Gtek 25G SFP28 SFP+ Transceiver, 25GBase-LR Duplex LC SMF Optical Module for Mellanox MMA2L20-AR, 1310nm, DDM, up to 10km

I bought both Mellanox and Intel versions and they seem to be interchangeable. Both work with 25gbe NICs from both brands. Both work with QNAP switches.Neither can work with a NETGEAR sfp+ switch in 10Gbe mode, even though I had another 10G copper adapter from 10GTek that worked with SFP28 NICs.

I purchased these 7 months ago and they were connected with about 75 meters of single mode fiber, and they have degraded to the point of only passing about 200 megabits. I believe they would be ok if I had used attenuators.

Very affordable, worked with Solarflare on-load NIC, and is stable for months of runtime now.

I was really hoping that this would be the part I needed but unfortunately it was not. I am sure there is a nuanced communication issue here but for the life of me I can't find what is the sticking point. My use case was to create a link between my router (mikrotik ccr2204) and the rest of my switch stack. I was not able to get any communication over this line even with other 10gtek receivers (40g and 100g) and all my attempts to get support from 10gtek were met with radio silence.This is a shame as I have had great luck with other parts (dac's, 40g, etc) but this one needs something but I just could not figure it out.

This is a review of the 10Gtek 25GBase-SR (100m) SFP28 transceiver. Intel-coded version. Part #: AZS85-S28-M1. It comes in a 10Gtek-branded metal container, safely padded.I originally bought one Intel-coded unit to use with my Intel 810XXV SFP28 nic. Having also tried it on my Ubiquiti usw-pro-aggregation switch, it works over there too! No need to pay for expensive Ubiquiti SFP28 transceivers! At $20 each, they're a great value over their competitors at $40-50 each.Be sure to upgrade the firmware on both the switch and the NIC. Otherwise, the link may not establish at 25G speeds. For the Ubiquiti switch, I'm on 6.5.59. For the Intel 810XXV nic, I'm on NVM 4.20.

I've generally had success with 10GTek SFP modules in my Ubiquiti gear, but this one is an exception. I bought 2 of these SFP28 modules, and both have issues in my USW-Pro-Aggregation on FW version 6.2.14. They will link up, but the initial link takes minutes, and then the link will go down every few minutes and renegotiate.I bought some Fiber Mall SFP28 modules, which work flawlessly. When I use a Fiber Mall SFP28 in my Ubiquiti switch, and one of these 10GTek modules in my Mellanox ConnectX-4 Lx NIC, the connection between them is stable.I'm only deducting one star since this may be an isolated incompatibility.