NOTE: A US AC power cable is included for powering up an AC power supply. You must order all other power cables separately.NOTE: ESD damage can occur if components are mishandled. Always wear an ESD-preventive wrist or heel ground strap whenhandling the S4200-ON Series switch and its components.Power up sequenceWhen the switch powers up, the fans immediately come on at high speed. The fan speed slows as the switch continues to boot up.After switch installationTo configure your switch, after you have securely installed and powered on the S4200-ON Series switch, see your open network installationenvironment (ONIE)-compatible operating system documentation at http://onie.org. For more information about working with the ONIEenvironment, see your switch documentation at www.dell.com/support.Switch replacementThe following steps describe removing and replacing a switch. For further assistance when replacing a switch, contact your Dell EMCsupport representative.NOTE: ESD damage can occur when components are mishandled. Always wear an ESD-preventive wrist or heel ground strapwhen handling the switch and accessories. After you remove the original packaging, place the switch and components on an anti-static surface.1 Back up the switch configuration to your back-up computer or laptop TFTP server.copy running-config tftp://hostip/filepathTo establish a console connection to the switch CLI, assign an IP address on the switch network.2 Disconnect the power source.3 Label and remove all cables.4 Remove the switch from the rack.At the same time, press in the two side-release bars on the switch and slide the switch forward.If you are using the fan trays or PSUs in the replacement switch, remove them from the switch.5 Unpack the new switch.For more information, see Unpack.6 Confirm that the software version of the replacement switch is the same as the previously installed switch.show os-versionIf the software versions do not match, upgrade the replacement switch software using the procedure included with the firmwaredownload.7 Copy the backed-up switch configuration to the new switch.copy tftp://hostip/filepath running-config8 Install the new switch in your rack or cabinet.For detailed installation instructions, see S4200-ON Series installation.If you are using the fan trays or PSUs from the removed switch, reinsert them in the replacement switch.9 Connect all the cables.10 Power on the switch.For more information, see Switch power up.S4200-ON Series installation 29