1m (3ft) Generic Compatible 100G QSFP28 to 4x25G SFP28 Passive Direct Attach Copper Breakout Cable

Not much else I can say but it’s a great DAC breakout cable. I ordered four sets and used them on my Cisco Nexus 92160YC-X switch. All of them worked flawlessly and had no compatibility issues.

I got a 1M and 2M 100G to 4×25G cables. I have these connected into 25G Mellanox Connect4-x Nics and Mellanox 2100 100G switch. The cables work perfectly with both devices and were seen immediately. Seems to be good quality build of cables and performs as advertised.

We are looking for a cable to connect Cisco N9K-C93180YC-EX and Mellanox 4421/4121A-ACAT cards. The 100G QSFP28 to 4x25G SFP28 DAC breakout cables we finally got were priced very competitively and worked exactly as intended. Considering that there will be the needs to work these cables on other switches like Mellanox SN2700/SN2100, Cisco, Arista, Juniper, etc that can do the 100G QSFP or 25G QSFP connections, we turn to the FS box which we have been eyeing for some time now. The AM has helped confirm that it can do the coding of the 100G QSFP28 side of the breakout DAC cable. With it, the 100G side of the 100 to 4x25G DAC cable is able to go to any switch. Would like to share more about the use of FS box (maybe an UNBOXING video on YouTube) later on.