Maintaining The Tx Matrix Host Subsystem - Juniper TX MATRIX Hardware Manual

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Maintaining the TX Matrix Host Subsystem

Purpose
Action
196
and refer to fans in the upper front fan tray;
Top Left Top Right
refer to fans in the lower front fan tray.
Right
To display the status of the fans in the routing matrix (TX Matrix router and all T640
routers), issue the
show chassis environment
in a specific T640 router, issue the
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
the temperature of the T640-SIB mezzanine board [displayed as
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
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.
On a regular basis:
Check the host subsystem LEDs (
or LED is lit, look at the LED display to get more information about the
HOST 0 HOST 1
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
command. The output is similar to the following:
user@host> show chassis routing-engine scc
scc-re0:
--------------------------------------------------------------------------
Routing Engine status:
Slot 0:
Current state
Election priority
Temperature
CPU temperature
DRAM
Memory utilization
command. To display the status of the fans
show chassis environment lcc lcc-number
and ) on the craft interface. If the red
HOST 0 HOST 1
show chassis routing-engine
Master
Master (default)
36 degrees C / 96 degrees F
38 degrees C / 100 degrees F
2048 MB
11 percent
Copyright © 2010, Juniper Networks, Inc.
and
Bottom Left Bottom
command,
), not by
SIB n
].
SIB n (B)