Juniper Networks MX240 manual Powering Off the Router

Chapter 9: Grounding and Providing Power to the Router

6.Switch on the dedicated facility circuit breakers to provide power to the DC power cables.

7.Check the INPUT OK LED is lit steadily green to verify that power is present.

8.If power is not present:

■Verify that the fuse is installed correctly and turn on the breaker at the battery distribution fuse board or fuse bay.

■Check the voltage with a meter at the terminals of the power supply for correct voltage level and polarity.

9.Switch the circuit breaker on each of the power supplies to the ON position — and observe the status LEDs on each power supply faceplate. If a DC power supply is correctly installed and functioning normally, the PWR OK, BRKR ON, and INPUT OK LEDs light green steadily.

If any of the status LEDs indicates that the power supply is not functioning normally, repeat the installation and cabling procedures described in “Replacing Power System Components” on page 112.

NOTE: After powering off a power supply, wait at least 60 seconds before turning it back on. After powering on a power supply, wait at least 60 seconds before turning it off.

If the system is completely powered off when you power on the power supply, the Routing Engine boots as the power supply completes its startup sequence. If the Routing Engine finishes booting and you need to power off the system again, first issue the CLI request system halt command.

After a power supply is powered on, it can take up to 60 seconds for status indicators—such as the status LEDs on the power supply and the show chassis command display—to indicate that the power supply is functioning normally. Ignore error indicators that appear during the first 60 seconds.

10.On the external management device connected to the Routing Engine, monitor the startup process to verify that the system has booted properly.

Powering Off the Router

If you need to power off the router:

1.On the external management device connected to the Routing Engine, issue the request system halt both-routing-enginesoperational mode command. The command shuts down the Routing Engines cleanly, so their state information is preserved. (If the router contains only one Routing Engine, issue the request system halt command.)

user@host> request system halt both-routing-engines

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