•
Place your hand near the exhaust vents at the side of the chassis to determine whether
the fans are pushing air out of the chassis.
•
If a fan tray is removed, a yellow alarm and a red alarm occur.
•
The following conditions automatically cause the fans to run at full speed and also
trigger the indicated alarm:
•
A fan fails (red alarm).
•
The router temperature exceeds the “temperature warm” threshold (yellow alarm).
•
The temperature of the router exceeds the maximum (“temperature hot”) threshold
(red alarm and automatic shutdown of the power supplies).
See Also
Alarm LEDs and Alarm Cutoff/Lamp Test Button on the MX480 Craft Interface on
page 37
•
•
Replacing the MX480 Fan Tray on page 238
•
Maintaining the MX480 Air Filter on page 233
•
Maintaining the MX480 Fan Tray on page 236
Troubleshooting the MX480 DPCs
Problem
Description:
The DPCs are not functioning normally.
Solution
•
Monitor the green LED labeled
OK
above the DPC on the craft interface as soon as a
DPC is seated in an operating router.
The Routing Engine downloads the DPC software to it under two conditions: the DPC
is present when the Routing Engine boots Junos OS, and the DPC is installed and
requested online through the CLI or push button on the front panel. The DPC then runs
diagnostics, during which the
OK
LED blinks. When the DPC is online and functioning
normally, the
OK
LED lights green steadily.
•
Make sure the DPC is properly seated in the midplane. Check that each ejector handle
has been turned clockwise and is tight.
•
Check the
OK/FAIL
LED on the DPC and
OK
and
FAIL
DPC LEDs on the craft interface.
When the DPC is online and functioning normally, the
OK
LED lights green steadily.
•
Issue the
show chassis fpc
command to check the status of installed DPCs. As shown
in the sample output, the value
Online
in the column labeled
State
indicates that the
DPC is functioning normally:
user@host>
show chassis fpc
Temp CPU Utilization (%) Memory Utilization (%)
Slot State (C) Total Interrupt DRAM (MB) Heap Buffer
0 Online 41 9 0 1024 15 57
1 Online 43 5 0 1024 16 57
2 Online 43 11 0 1024 16 57
Copyright © 2019, Juniper Networks, Inc.
356
MX480 Universal Routing Platform Hardware Guide
Содержание MX480
Страница 14: ...Copyright 2019 Juniper Networks Inc xiv MX480 Universal Routing Platform Hardware Guide...
Страница 22: ...Copyright 2019 Juniper Networks Inc xxii MX480 Universal Routing Platform Hardware Guide...
Страница 138: ...Copyright 2019 Juniper Networks Inc 138 MX480 Universal Routing Platform Hardware Guide...
Страница 168: ...Copyright 2019 Juniper Networks Inc 168 MX480 Universal Routing Platform Hardware Guide...
Страница 352: ...Copyright 2019 Juniper Networks Inc 352 MX480 Universal Routing Platform Hardware Guide...
Страница 382: ...Copyright 2019 Juniper Networks Inc 382 MX480 Universal Routing Platform Hardware Guide...
Страница 420: ...Copyright 2019 Juniper Networks Inc 420 MX480 Universal Routing Platform Hardware Guide...