Juniper SRX3400, Hardware Manual, Page: 115 / 232

Troubleshooting with Chassis and Interface Alarm Messages on the SRX3400 Services Gateway
When the Routing Engine detects an alarm condition, it lights the red or yellow alarm
LED on the SFB as appropriate. To view a more detailed description of the alarm cause,
issue the
show chassis alarms CLI command:
user@host> show chassis alarms
There are two classes of alarm messages:
•
Chassis alarms—Indicate a problem with a chassis component such as the cooling
system or power supplies.
• Interface alarms—Indicate a problem with a specific network interface.
Related
Documentation
Troubleshooting with the CLI on the SRX3400 Services Gateway on page 99
•
•
Troubleshooting with LEDs on the SRX3400 Services Gateway on page 100
Juniper Networks Technical Assistance Center
If you need assistance while troubleshooting a services gateway, open a support case
using the Case Manager link at:
http://www.juniper.net/support/ , or call 1-888-314-JTAC
(within the United States) or 1-408-745-9500 (from outside the United States).
Related
Documentation
Troubleshooting with the CLI on the SRX3400 Services Gateway on page 99
•
•
Troubleshooting with LEDs on the SRX3400 Services Gateway on page 100
•
Troubleshooting with Chassis and Interface Alarm Messages on the SRX3400 Services
Gateway on page 101
Troubleshooting the Cooling System on the SRX3400 Services Gateway
The services gateway cooling system consists of a fan tray and an air filter, both of which
are located vertically in the rear of the chassis. The fan tray contains four fans. The fan
tray provides cooling to the components installed in the services gateway.
An air filter installed in the rear of the chassis helps keep dust and other particles from
entering the cooling system. To function properly, the entire cooling system requires an
unobstructed airflow and proper clearance around the site, as described in
“Site
Preparation Checklist for the SRX3400 Services Gateway” on page 37 .
During normal operation, the fans in the fan tray function at less than full speed. The
Routing Engine constantly monitors the temperatures detected by sensors and services
gateway components, adjusting the speed of the fans as necessary. If the services gateway
temperature exceeds the acceptable maximum, the Routing Engine turns off the power
supplies. The following conditions automatically cause the fans to run at full speed and
also trigger the indicated alarm:
• A fan fails (red alarm).
• The fan tray is removed (yellow alarm and red alarm).
101 Copyright © 2013, Juniper Networks, Inc.
Chapter 11: Troubleshooting the SRX3400 Services Gateway