Maintaining The T640 Host Subsystem - Juniper T640 Hardware Manual

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Maintaining the T640 Host Subsystem

Purpose
Action
Copyright © 2017, Juniper Networks, Inc.
Rear Tray Seventh fan
Rear Tray Bottom fan
For the quiet fan trays, the output for the
following:
user@host> show chassis fan
Item
Top Left Front fan
Top Left Rear fan
Top Right Front fan
Top Right Rear fan
Bottom Left Front fan
Bottom Left Rear fan
Bottom Right Front fan
Bottom Right Rear fan
Rear Tray Top fan
Rear Tray Second fan
Rear Tray Third fan
Rear Tray Fourth fan
Rear Tray Fifth fan
Rear Tray Sixth fan
Rear Tray Seventh fan
Rear Tray Bottom fan
T640 Cooling System Description on page 31
Troubleshooting the T640 Cooling System on page 469
For optimum router performance, verify the condition of the host subsystem. The host
subsystem comprises a Routing Engine and up to two adjacent control boards functioning
together.
On a regular basis:
Check the host subsystem LEDs (
HOST0 FAIL or HOST1 FAIL
the cause of the problem. For more information about the LEDs and the display, see
"T640 Craft Interface Description" on page
During normal operations:
The green host subsystem
The red host subsystem
Check the LCD on the craft interface to view information about the status of the Routing
Engines and control boards.
OK 5190
OK 5190
show chassis fan
Status RPM
OK 2220
OK 2190
OK 2220
OK 2250
OK 2220
OK 2220
OK 2250
OK 2220
OK 5190
OK 5190
OK 5190
OK 5190
OK 5190
OK 5190
OK 5190
OK 5190
and ) on the craft interface. If the red
HOST0 HOST1
LED is lit, look at the LCD to get more information about
22.
LED on the craft interface is lit.
OK
LED on the craft interface is not lit.
FAIL
Chapter 32: Maintaining Components
Spinning at normal speed
Spinning at normal speed
command is similar to the
Measurement
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
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