You can replace internal power supplies and fan modules, as needed, while the switch is operating ("hot swapping").
VIMs and SSDs are not hot-swappable, and the switch must be disconnected from its power source before replacing these components.
For each switch, ensure that all installed power supplies and fan modules have the same front-to-back airflow direction.
Follow the procedures in this section to remove and replace power supplies, fan modules, and expansion modules, and to remove a switch from a rack.