Juniper Networks M10i Benutzerhandbuch

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Disconnecting DC Power from the Router

To disconnect DC power from the router, follow this procedure:

1.

On the console or other management device connected to the Routing Engine,
enter CLI operational mode and issue the following command to shut down the
router software cleanly and preserve Routing Engine state information.

user@host> request system halt

NOTE: Wait until a message appears on the console confirming that the operating
system has halted.

For more information about the command, see the JUNOS System Basics and
Services Command Reference.

NOTE: The router might continue forwarding traffic for a few minutes after the

request system halt

 command has been issued.

2.

For each power supply, press the power switch on the power supply faceplate
to the 

OFF

 (

O

) position.

NOTE: If you are power cycling the power supply rather than shutting it off for a
time, wait at least 60 seconds after turning it off before turning it back on. If you
need to power it off again, wait for at least 60 seconds after powering it on.

3.

Shut off the power flowing from both external power sources, so that the voltage
across the leads of the power cables is 0 V. Ensure that there is no chance that
the cable leads might become active during the procedure.

4.

Using a number 1 Phillips screwdriver, turn the screw on each field-wiring
terminal counter-clockwise to loosen the terminal connector from around the
cable.

5.

Remove the cables from the terminal connectors and from the hook located on
the faceplate to the right of the field-wiring terminals.

6.

Verify that the removed cables are not touching or blocking access to any router
components.

Replacing Power System Components

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Chapter 13: Replacing Hardware Components