Cisco announced that a clock module in certain products may have a failure after 18months. This one is big, and this one is bad!
Partial list of systems with issues (ordered by my own priority of which I think will hit my customers the worst)
ASA 5506, ASA 5506W, ASA 5506H, ASA 5508, and ASA 5516 <---- ahh crap! Meraki MS350, MB84 Nexus 9000 Series N9K-C9504-FM-E/N9K-C9508-FM-E/N9K-X9732C-EX NCS1K-CNTLR Cisco ISA3000 SR4331, ISR4321, ISR4351 and UCS-E120