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Environment/Versions   SPT-9000 (9u) SPT-2u SPT-11u SPT-3u SPT-N11u SPT-N4u SPT-N12u Answer In most of the cases you can telnet/SSH (admin/spt_admin) to chassis and gracefully shutdown using the 'shutdown' command. The command 'help' will list out the available commands. If there is no 'shutdown' command, you can power it off using the power button on the chassis. SPT-9000 (9u) You simply press the button and walk away. The chassis, after a short delay, starts to shut down.  SPT-2u SPT-11u You must hold the button down for about 5 seconds waiting for the status LED to turn amber. Do not release it until it turns red. Once it does you can release it and walk away. The chassis will gracefully shut down. If you release it early the chassis will keep running normally. SPT-3u SPT-N11u A simple push and release of the power button initiate a graceful shutdown. If you need to force a shutdown you push the power button and hold it for five seconds. Please note the difference because the procedure to gracefully shut down the SPT-11U chassis will cause a forced shutdown of the SPT-N11U chassis. SPT-N4u SPT-N12u