Figure 314: M40 Router Impeller Trays; Figure 315: M40 Router Air Filter And Fan Tray - Juniper M Series Monitoring And Troubleshooting Manual

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Table of Contents

M Series and T Series Routers Monitoring and Troubleshooting Guide

Figure 314: M40 Router Impeller Trays

Documentation

M40e and M160 Router Redundant Cooling System Components

Figure 315 on page 630

shows the M40 router air filter and fan tray.

Checklist for Monitoring Redundant Cooling System Components on page 623

The M40e and M160 routers include the following cooling system components:

Front cooling subsystem—Cools the FPCs, PICs, and midplane. It includes a fan tray

located behind the cable management system and a large, central impeller behind

the craft interface (fan tray front left, fan tray front right, fan tray rear left, fan tray rear

right, and front top blower).

Rear cooling subsystem—Cools the Switching and Forwarding Modules (SFMs), host

module, PFE Clock Generators (PCGs), and power supplies. It includes one impeller

located at the upper right of the chassis rear and another at the lower left (rear top

blower and rear bottom blower). The upper and lower impellers are not

interchangeable.

Figure 316 on page 631

shows the M40e and M160 router cooling system components

and airflow.