did someone try to use a QFP28 to SFP28 converter on the CRS504-4XQ-IN. Does it support the read of the SFP28 DOM (temperature and others informations) in such cases?

Seems to not work. A DAC is working but not when using an optic. The Mikrotik doesn't detect the SFP28 and try to use it as QSFP28 module so the memory space is not the same and DOM is not read correctly :/

Hello,

recently i bought the CRS504 switch and also break-out (fan-out) AOC to split 100Gbps port to 4x25Gbps.
Cable i used is from fs.com and when i ordered it, i've requested fs.com to program QSFP28 end to work with CRS504 and 4x25 SFP28 to work with my mellanox connect-x4 cards.
AOC cable arrived and initially there was no link, but i figured out i had to set manually speed to 25G for each of 4 ports. After that connection worked flawlessly.
However, there are some points i would like to discuss.

1) QSFP28 module info is shown only partially screenshot
2) when i disable port 1, system automatically disables also port 4 and the opposite - if i disable port 4, port 1 is also disabled, not sure why but that is not supposed to be like that screenshot

The information about SFP is not so critical to me, as i use the switch in my home lab, but port issue (1-4) is big concern.
I hope there will be someone who could shed some light why this is happening (perhaps bug in routeros or maybe feature )