Figure 310: M7I Router Cooling System And Airflow; Figure 311: M10I Router Cooling System Components And Airflow - Juniper M Series Monitoring And Troubleshooting Manual

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Figure 310: M7i Router Cooling System and Airflow

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M10i Router Redundant Cooling System Components

Checklist for Monitoring Redundant Cooling System Components on page 623

The M10i router cooling system consists of two fan trays, located along the left and right

side of the chassis, that provide side-to-side cooling (see

connect directly to the router midplane. Each fan tray is a single unit containing eight

individually fault-tolerant fans. If a single fan fails, the remaining fans continue to function

indefinitely. For proper airflow, the primary fan tray should be installed in slot

slot looking at the chassis from the rear) and must be installed for proper cooling at all

times. The redundant fan tray, if present, should be installed in slot

fan tray provides additional cooling and redundancy. The fan tray is hot-removable and

hot-insertable.

Do not remove both fan trays for more than one minute while the

router is operating. The fans are the sole source of cooling, and the router

will overheat when they are absent.

Chapter 31: Monitoring Redundant Cooling System Components

Figure 311 on page

on the right. This