The most common root cause is an optical transceiver (SFP/QSFP) operating at or near its maximum receive sensitivity threshold, triggering intermittent link flaps. Switch stacking is a technology that connects multiple physical switches into a single logical unit. I would suggest to Look Cat 9300 (cat 3850 going to be end of life soon - you may negotiate nicely so you may have same price of 3850 with Cat 9300 switches?) You can have combination of Cat 9300 for Layer 2 and core (kind of) and Cat 9200. Stacking switches is not akin to an HA pair. Does the core connect to a disti layer or collapsed backbone or something else? Depending on what the core is actually doing will. When it experiences intermittent connection drops, the impact spans entire VLANs, server racks, and user populations. This technical FAQ targets both pre-sales architecture validation and post-sales troubleshooting—covering optical module compatibility, backplane capacity, stacking interface. STACK Switch™ from Lithonia Lighting® is the fully switchable version of the next-generation family of lay-ins. With its three Adjustable Lumen Outputs (ALO) and three Switchable Color Temperatures (SWW) both conveniently located on the driver box, STACK Switch replaces the need to stock nine skews. The console LED indicates whether the USB console port or the bluetooth console is enabled. USB Mini-Type B console port is active.
