- play_arrow Fast Track: Initial Installation
- play_arrow Site Planning, Preparation, and Specifications
- play_arrow Initial Installation and Configuration
- play_arrow Maintaining Components
- Routine Maintenance Procedures for EX9200 Switches
- Maintaining the EX9200 Cooling System
- Maintaining the EX9208 Power System
- Maintaining the EX9200 Host Subsystem
- Maintaining the EX9200 Line Cards
- Maintain Transceivers
- Maintaining Alarm Relay Wire
- Maintain Fiber-Optic Cables
- Maintaining the EX9208 Cable Management Brackets
- Removing an EX9208 from a Rack or Cabinet
- play_arrow Troubleshooting Hardware
- play_arrow Contacting Customer Support and Returning the Chassis or Components
- play_arrow Safety and Compliance Information
- General Safety Guidelines and Warnings
- Definitions of Safety Warning Levels
- Qualified Personnel Warning
- Warning Statement for Norway and Sweden
- Fire Safety Requirements
- Installation Instructions Warning
- Chassis and Component Lifting Guidelines
- Restricted Access Warning
- Ramp Warning
- Rack-Mounting and Cabinet-Mounting Warnings
- Grounded Equipment Warning
- Radiation from Open Port Apertures Warning
- Laser and LED Safety Guidelines and Warnings
- Maintenance and Operational Safety Guidelines and Warnings
- General Electrical Safety Guidelines and Warnings
- Action to Take After an Electrical Accident
- Prevention of Electrostatic Discharge Damage
- AC Power Electrical Safety Guidelines
- AC Power Disconnection Warning
- DC Power Electrical Safety Guidelines
- DC Power Disconnection Warning
- DC Power Grounding Requirements and Warning
- DC Power Wiring Sequence Warning
- DC Power Wiring Terminations Warning
- Multiple Power Supplies Disconnection Warning
- TN Power Warning
- Agency Approvals for EX Series Switches
- Battery Compliance Statement for Environmental Requirements for EX Series Switches
- Compliance Statements for EMC Requirements for EX Series Switches
- Compliance Statements for Acoustic Noise for EX Series Switches
EX9208 Cooling System
The cooling system in an EX9208 switch consists of a fan tray and an air filter. The cooling system components work together to keep all switch components within the acceptable temperature range.
Fan Tray
Fan tray is a hot-insertable and hot-removable field-replaceable unit (FRU) and contains six fans. The fan tray and air filter install vertically in the rear of the switch. See Figure 1 and Figure 2.
Airflow Direction in the EX9208 Switch Chassis
The air intake to cool the chassis is located on the side of the chassis next to the air filter. Air is pulled through the chassis toward the fan tray, where it is exhausted out through the side of the chassis. The air intake to cool the power supplies is located in the front of the chassis above the craft interface. See Figure 3.
The host subsystem monitors the temperature of switch components. Under normal operating conditions, the fans in the fan tray run at less than full speed. If a fan fails or the ambient temperature rises above a threshold, the speed of the remaining fans is automatically adjusted to keep the temperature within the acceptable range. If the ambient maximum temperature specification is exceeded and the system cannot be adequately cooled, the Routing Engine shuts down the system by disabling output power from each power supply.
You cannot replace a single fan. If one or more fans fail, you must replace the entire fan tray.
