Hi, I know one 100Gbps QSFP28 can be splitted to 4 25Gbps SFP28 or 2 50Gbps QSFP28 using breakout cable. Is it possible to have both type splitting? What if one or more but not all of them should go to fiber, what item should I use for that? Best regards,
If you plan to have out of a QSFP28 some 25Gbps lanes as regular fiber to plug into a transceiver (SFP28) and some as passive copper DAC, that doesn't exist (to my knowledge).
Either you plug a QSFP28 DAC/AOC that breakout into 4xSFP28 of the same type, or you use a QSFP28 transceiver (SR4 for example) and you use a breakout cable MPO-to-8xLC, to connect to other transceivers (SFP28).