All the cards of the CE12800&CE12800E series switches are hot swappable.
•Main Processing Units (MPUs) and Centralized Monitoring Units (CMUs) support 1:1 hot standby.
•Switch Fabric Units (SFUs) support N+M hot standby. To remove an SFU, hold down the OFL button (at the bottom of the enlarged image) for at least 6s until the OFL indicator turns red (at the top of the enlarged image). Then remove the SFU from the chassis. Packets may be lost if you remove the SFU before the OFL indicator turns red.