Fan Tray; Cable Management System; Figure 9: Airflow Through The Chassis - Juniper M10i Hardware Manual

Fan Tray

The router's cooling system consists of two fan trays, located along the left and right
side of the chassis, that provide side-to-side cooling (see
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
proper cooling at all times. The redundant fan tray, if present, should be installed in
slot

Figure 9: Airflow Through the Chassis

The fan tray is hot-removable and hot-insertable, as described in
Units (FRUs)"
Tray"
CAUTION: 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 can overheat
when they are absent.

Cable Management System

The cable management system consists of racks that attach vertically to each side
of the chassis at the front, as shown in
in the racks to keep the cables organized and securely in place, and to avoid bending
optical cables beyond the proper bend radius. The cable management system evenly
distributes the weight of a cable, so that it is not subjected to undue stress at the
connector.
(the left slot looking at the chassis from the rear) and must be installed for
1
0 on the right. This fan tray provides additional cooling and redundancy.
on page 3. For instructions on replacing it, see
on page 88.
Chapter 2: Hardware Component Overview
Figure 9
"Replacing a Fan
. Pass PIC cables through the slots
Figure 10
). They connect
"Field-Replaceable
23
Fan Tray