Juniper CBL-M40-PWR-AU ユーザーズマニュアル
Replace an AC Power Supply
M40 Internet Router Hardware Guide
136
Issue the following CLI command to check the status of the power supplies. As shown in
the sample output, the value
OK
in the
Status
column indicates that the power supply is
operating normally:
user@host> show chassis environment
Class Item Status Measurement
Power Power Supply A
OK
Power Supply B OK
. . .
For further description of the output from the command, see the JUNOS Internet
Software Operational Mode Command Reference: Protocols, Class of Service, Chassis, and
Management.
Software Operational Mode Command Reference: Protocols, Class of Service, Chassis, and
Management.
Check the red and yellow alarm LEDs and the LCD on the craft interface. Power supply
failure or removal triggers an alarm that causes one or both of the LEDs to light and an
error message to appear on the LCD. You can display the error messages remotely by
issuing the following CLI command:
error message to appear on the LCD. You can display the error messages remotely by
issuing the following CLI command:
user@host> show chassis alarms
For a list of possible alarm messages, see “Hardware and Interface Alarm Messages” on
page 235.
page 235.
Verify that the airflow to each supply is unobstructed.
Verify that the power source has the proper current rating and that each power supply is
connected to a separate power source.
Verify that the cable or cord connecting the power supply to the external power source is
securely in place and that there is no moisture accumulating near the router.
Verify that the cable or cord from the power source to the router is not damaged. If the
insulation is cracked or broken, replace the cable or cord immediately.
Verify that the power cables or cord do not touch or obstruct access to other router
components, and that they do not drape where people could trip on them.
Replace an AC Power Supply
An AC-powered router has two load-sharing, redundant AC power supplies. Each power
supply is hot-removable and hot-insertable, as described in “Field-Replaceable Units (FRUs)”
on page 4. When one power supply fails or is powered down, the other power supply
automatically assumes the entire electrical load for the router.
supply is hot-removable and hot-insertable, as described in “Field-Replaceable Units (FRUs)”
on page 4. When one power supply fails or is powered down, the other power supply
automatically assumes the entire electrical load for the router.
To replace an AC power supply, perform the following procedures: