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EX6210 Switch Cooling System

 

The cooling system in an EX6210 switch consists of a single fan tray.

Fan Tray

The fan tray is a hot-insertable and hot-removable field-replaceable unit (FRU). The fan tray contains six fans, three rows of two fans each.

The fan tray installs vertically on the right side on the rear of the chassis and provides front-to-back chassis cooling. Two handles, one handle on the top and one on the bottom of the front faceplate facilitates handling of the fan tray. See Figure 1.

Figure 1: Fan Tray for an EX6210 Switch
Fan Tray for an EX6210
Switch

The fan tray can be removed and replaced from the rear of the chassis. The switch continues to operate for a limited time of 2 minutes during the replacement of the fan tray without thermal shutdown.

Caution

The fan tray can be removed and replaced while the switch is operating. However, you must replace the fan tray within 2 minutes of removing it, at room temperature, to prevent the chassis from overheating.

Airflow Direction in the EX6210 Switch Chassis

The air intake to cool the chassis is located on the front right side of the chassis. Air is pulled into the chassis and is pushed through the line card cage towards the fan tray. Hot air exhausts from the rear left side of the chassis. See Figure 2.

Figure 2: Airflow Through the EX6210 Switch Chassis
Airflow Through the EX6210
Switch Chassis

The air intake to cool the power supplies is located in the front of each power supply unit. The exhaust for the hot air collected from the power supplies is located on the rear of the chassis at the bottom.

Caution

Do not block the air intake and air exhaust for the fan tray and power supplies.

The Switch Fabric and Routing Engine (SRE) module 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, the speed of the remaining fans is automatically adjusted to keep the temperature within the acceptable range, 32°F (0°C) through 104°F (40°C).

The fan tray continues to operate indefinitely and provide sufficient cooling even when a single fan fails provided the room temperature is within the operating range. You can check the status of fans and the chassis temperature from the Environment Status option in the Status menu on the LCD panel. See LCD Panel in an EX6200 Switch.

You cannot replace a single fan. If one or more fans fail, you must replace the entire fan tray.