Juniper Networks M10i manual Replacing a DC Power Supply

M10i Internet Router Hardware Guide

5.Press the power switches on the faceplates of two power supplies to the ON ( ) position. When the power supply has powered on successfully, the green OUTPUT OK LED lights steadily.

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 router 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 router again, first issue the CLI request system halt command. For more information, see “Disconnecting AC Power from the Router” on page 111 or “Disconnecting DC Power from the Router” on page 117.

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

6.Press the power switch on the remaining power supplies to the ON ( ) position and observe the LEDs on the power supply faceplate. They should light as described in the previous step.

If the LEDs are not lit in the appropriate pattern after 60 seconds, repeat the procedures in “Installing an AC Power Supply” on page 109 and the previous steps in this procedure.

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

Replacing a DC Power Supply

A DC-powered router has two or more load-sharing DC power supplies. Each power supply is hot-removable and hot-insertable, as described in “Field-Replaceable Units (FRUs)” on page 3. For more information about DC power supplies, see “DC Power Supply” on page 21.

To replace a DC power supply, perform the following procedures:

■Removing a DC Power Supply on page 113

■Installing a DC Power Supply on page 114

112■ Replacing Power System Components