I am trying to find out whether the QSFP ports on the back of the EX4300-24P switches support breakout cables?
I can see from older posts that back in 2014-2016 that it was not supported then - as listed on the old datasheets - as there was a clause that said they were not supported. This does not appear to be in the manuals or setup info anymore.
I have no idea of hardware of firmware on the pair of EX4300's that I have, as they are still in the box waiting to be commissioned.
Under at least 17.3 there is no channel-speed option on the EX4300, so I'd guess still no.
test@test# set chassis fpc 0 pic 1 ?
+ apply-groups Groups from which to inherit configuration data
+ apply-groups-except Don't inherit configuration data from these groups
mlfr-uni-nni-bundles-inline Number of inline multilink frame relay UNI NNI bundles
no-multi-rate Disable multi-rate mode
> q-pic-large-buffer Run in large delay buffer mode