Top Left
and
Top Right
refer to fans in the upper front fan tray;
Bottom Left
and
Bottom
Right
refer to fans in the lower front fan tray.
To display the status of the fans in the routing matrix (TX Matrix router and all T640
routers), issue the
show chassis environment
command. To display the status of the fans
in a specific T640 router, issue the
show chassis environment lcc
lcc-number
command,
where
lcc-number
is the chassis ID of the router and can be from 0 through 3.
NOTE:
The speed of the fans in the rear fan tray of a T640 router is affected
by the temperature of the T640-SIB main board (displayed as
SIB
n
), not by
the temperature of the T640-SIB mezzanine board [displayed as
SIB
n
(B)
].
Related
Documentation
TX Matrix Cooling System Overview on page 47
•
•
Replacing a TX Matrix Front Fan Tray on page 235
•
Replacing the TX Matrix Rear Fan Tray on page 237
•
TX Matrix Clearance Requirements for Airflow and Hardware Maintenance on page 63
Maintaining the TX Matrix Host Subsystem
Purpose
For optimum TX Matrix performance, verify the condition of the host subsystem. The
host subsystem comprises up to two Routing Engines and adjacent TX-CBs functioning
together.
Action
On a regular basis:
•
Check the host subsystem LEDs (
HOST 0
and
HOST 1
) on the craft interface. If the red
HOST 0
or
HOST 1
LED is lit, look at the LED display to get more information about the
cause of the problem.
•
Check the LED display on the craft interface to view information about the TX Matrix
router temperature and the status of the Routing Engines.
•
Check the LEDs on the TX-CB faceplate to see information about the TX-CB.
•
Check the status of the Routing Engines. Issue the
show chassis routing-engine
command. The output is similar to the following:
user@host>
show chassis routing-engine scc
scc-re0:
--------------------------------------------------------------------------
Routing Engine status:
Slot 0:
Current state Master
Election priority Master (default)
Temperature 36 degrees C / 96 degrees F
CPU temperature 38 degrees C / 100 degrees F
DRAM 2048 MB
Memory utilization 11 percent
Copyright © 2010, Juniper Networks, Inc.
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