Maintaining The T4000 Sibs - Juniper T4000 Hardware Manual

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Maintaining the T4000 SIBs

Purpose
Action
Copyright © 2018, Juniper Networks, Inc.
an error message to appear on the LCD. You can display the associated error messages
by issuing the following CLI command:
user@host> show chassis alarms
For a list of possible alarm messages, see
on page 363.
Make sure that the DC power cables are arranged so that they do not obstruct access
to other router components.
The power supplies require an unobstructed airflow at both the front and rear of the
chassis. Periodically check the site to ensure that both the air intake at the bottom
front of the chassis and the exhaust from the power supply faceplates are unobstructed.
Periodically inspect the site to ensure that the grounding and power cables connected
to the router are securely in place and that no moisture is accumulating near the router.
To review grounding and site wiring requirements for the router, see
Cable and Lugs Specifications" on page 105
Lug Specifications" on page
Use the
show chassis environment pem
supplies.
Routinely check the status LEDs on the power supply faceplates to verify that the
power supplies are functioning normally. During normal operation:
The blue LEDs light to indicate that the power supplies are functioning
DC OK
normally.
Each green INPUT PRESENT
receiving source DC power.
T4000 Power System Description on page 75
T4000 Six-Input DC Power Supply LEDs on page 77
For optimum router performance, verify the condition of the SIBs.
On a regular basis:
Check the LEDs on the SIB faceplate and on the craft interface. During normal
operations:
The green LED is lit.
OK
The red LED is not lit. If the red
FAIL
on page 368.
Use the
show chassis environment sib
"Troubleshooting the T4000 Power System"
and "T4000 Chassis Grounding Cable and
90.
command to verify the status of the power
LED on a DC power supply lights when the input is
is lit, see "Troubleshooting the T4000 SIBs"
FAIL
command to verify the status of the SIBs.
Chapter 34: Maintaining Components
"T4000 DC Power
339