I am trying to figure out if a QSFP-DD transceiver can break out 8x 10G lanes if I make/use a 1:8 fiber optic breakout cable. It seems like most transceivers are rated for one speed only, so if I get a QSFP-DD transceiver(such as a 400G-SR8), and break it out to 8x 10G SFP+ transceivers, will that work? All the QSFP-DD Transceivers seem to be rated for breakouts of 50G or 25G.
I tried reaching out to local vendors but they were unsure as well. I know QSFP and SFP are supposed to be backwards compatible, but that seems to be only for the ports and not the transceivers (like the ports can support older iterations), so I can use a QSFP+ to 4x SFP+ cable but then I'm losing 4 lanes of data? I may be also misunderstanding that as well.
Has anyone worked or applied this specific use case before?
Any guidance would be greatly appreciated.