I just purchased 2 Cisco SG350X-24P and I'm trying to set up stacking with those two switches. If I use a standard CAT5 Cable and use the Combo SPF+ ports everything works as expected.
If I try to use any third party SPF in either the SPF+ or SPF Combo ports I can not get stacking to work at all. I'm fairly confident that the SPF I'm using are fine because if I use them in in a non-stack port they work fine.
Any suggestions? I'm using FW 2.4.0.94.