Trouble connecting Netgear XS748T to Ubiquiti UniFi US-48-750W via Port SFP +.

We bought a new switch Netgear XS748T and try connecting to our existing network which consists of several switches of Ubiquiti UniFi US-48-750W, and we try to connect using the SFP + 10 GB ports on the two switches. We have a Direct Link SFP + SFP + DAC, passive, 1 m, cable AWG30, we bought at Amazon / 10Gtek and when we try to use this cable between the Ubiquiti switch and the Netgear we get no link activity.

However if we use the same cable between two of Ubiquiti switches it lights immediately and works very well, the same is true if we use the same SFP + cable between the switch Netgear XS748T and a XS728T that we must also. Its almost as if the switches detect the same manufacturer at the other end and right link up but when its manufacturer another pass on the other end, it does nothing.

It is very aggravating, and Im going to be obliged to return the new Netgear switches. Can someone make a suggestion or confirm if they should or may not work? Everything simply connecting switches together using a cable of copper works very well but since our current switches don't support 1 GB via copper it provides not enough bandwidth for our use so we really need the port SFP + 10 GB to give us the uplink.

Here is a link to the modules SFP + cable, we bought:

https://www.Amazon.com/DP/B01LSGGUOY/ref=twister_B01M0ER4M0?_encoding=UTF8&PSC=1

It seems that I solved the problem myself. I bought a set of:
10Gtek for Cisco SFP - 10 G - LR, 10 Gb/s Transceiver SFP + module 1310nm 10km

And the LR version worked instantly. I honestly don't know what's the difference between a SFP + SR module and a module LR SFP +, but for some reason any LR module has allowed these two switches to connect.

Here are links to the modules and the cable used in case anyone needs a solution to this:

LR SFP + Module:
https://www.Amazon.com/GP/product/B00UMS905G/ref=oh_aui_detailpage_o00_s00?ie=UTF8&PSC=1

Fiber cable:
https://www.Amazon.com/GP/product/B00T5796DQ/ref=oh_aui_detailpage_o00_s00?ie=UTF8&PSC=1

Tags: Netgear

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