On Fri, Apr 30, 2021 at 09:21:13PM +0000, Ross Halliday wrote: > Do FS QSFP+ breakout DACs and AOCs work on this platform? Is there some magic sauce firmware I'm too daft to find? > > (I've talked to JTAC, of course they blame the third-party transceiver) Did you try disabling auto-negotiation?