We are using 4x CRS326-24S+2Q+ switches and have had red fault lights now with 2x units. All switching ceases in such cases. In the first instance it seemed that a single SFP+ module caused the failure and removing that removed the fault. I haven't had a look at the 2nd switch yet (just happened yesterday) but I can't access it via its IP address to check logs. The SFP+ modules are:
- SFP-10G-T-S "Cisco Compatible" 10G RJ45 (one of these is what seemed to cause the first fault)
- SFP-10G-SR Cisco - 850mm multimode with LC connectors