Cmts Powers Down

CMTS Power and Booting Issues

!The OK LED of a NIC Module does not illuminate.

!The OPERATIONAL LED of a NIC Access Module does not illuminate.

A faulty Chassis Control Module will prevent the CMTS from successfully booting up and might give the false appearance that the DOCSIS Modules and the NIC Modules are also faulty (based on their LED status). Determine the operational status of the Chassis Control Module before declaring any DOCSIS Modules or NIC Modules as faulty.

!The CMTS could not boot from the flash disk. When the CMTS boots, it first attempts to start the software image from the flash disk. If this fails, you can remove the flash disk to force the CMTS to boot from the hard disk. Contact customer support for learn how to remove the flash disk. Normally, you want the CMTS to boot from the flash disk.

!The CMTS was powered down and powered up in quick succession. We recommend that you wait at least 10 seconds after powering down the CMTS before you power it up.

If the CMTS powers down, this might be caused by one or more of the following:

!Power has been disrupted to the system. See “CMTS Is Not Powering Up” on page 148.

!The power supplies in the CMTS have reached their over-temperature shutdown limit.

1.Check the ambient temperature in the headend or hub in which the CMTS resides. The air cooling system might not be fully operative, and the ambient operating temperature might have exceeded the maximum specification for the G10 CMTS of 40°C. See if an SNMP message was sent to the NMS or an entry was added to the event log indicating the temperature of the CMTS exceeded the high threshold (defined by the high statement).

2.Check that all empty module slots and power supply bays contain air management modules, panels, and filler panels. In addition, the power supply faceplate must always be installed while the CMTS is operating. These requirements ensure that proper air ventilation occurs throughout the chassis.

3.Ensure that proper clearance is maintained between the G10 CMTS chassis and its surroundings to allow adequate air ventilation to flow into the air intakes and out of the air exhaust. See “Rack Mounting” on page 94 for clearance details.

4.One or more of the fans within a fan tray might have stopped rotating while the CMTS was operating. If an SNMP message was sent to the NMS, an entry was added to the event log indicating a fan failure, or a fan tray LED was illuminated red before the CMTS powered down, you must replace the fan tray that contains the faulty fan.

•

Troubleshooting 149

Juniper Networks G10 CMTS manual Cmts Powers Down

Models: G10 CMTS

CMTS Power and Booting Issues

CMTS Powers Down