Juniper Networks EX8208 - Manual (Page 127)

Table 40: Cabinet Requirements and Specifications for an EX8208 Switch (continued)
Guidelines for the EX8208 Switch Cabinet Requirement
When you mount the switch on a cabinet, ensure that
ventilation through the cabinet is sufficient to prevent
overheating. Consider the following requirements list when
planning for chassis cooling:
• Ensure that the cool air supply you provide through the
cabinet adequately dissipates the thermal output of the
switch (or switches).
• Ensure that the cabinet allows the chassis hot exhaust air
to exit the cabinet without recirculating into the switch. An
open cabinet (without a top or doors) that employs hot air
exhaust extraction from the top allows the best airflow
through the chassis. If the cabinet contains a top or doors,
perforations in these elements assist with removing the hot
air exhaust. For an illustration of chassis airflow, see
“Clearance Requirements for Airflow and Hardware
Maintenance for an EX8208 Switch” on page 101.
• The switch fans exhaust hot air through the right side of the
chassis (the left side when you face the front of the chassis,
where the fan tray slides in). Install the switch in the cabinet
in a way that maximizes the open space on the fan tray side
of the chassis. This maximizes the clearance for critical
airflow.
• Route and dress all cables to minimize the blockage of
airflow to and from the chassis.
• Ensure that the spacing of rails and adjacent racks allows
for the proper clearance around the switch and rack as
specified in “Clearance Requirements for Airflow and
Hardware Maintenance for an EX8208 Switch” on page 101.
Cabinet airflow requirements
Related Topics Rack-Mounting and Cabinet-Mounting Warnings for EX Series Switches on page 278 •
• Rack Requirements for an EX8208 Switch on page 97
• Chassis Physical Specifications of an EX8208 Switch on page 9
Clearance Requirements for Airflow and Hardware Maintenance for an EX8208 Switch
When planning the site for installing an EX8208 switch, you must allow sufficient
clearance around the switch.
NOTE: To manage airflow in a hot-aisle--cold-aisle data center setup, you might want
to use the customized rack solution for EX8200 switches offered by Chatsworth
Products, Inc.
• Allow at least 6 in. (15.2 cm) of clearance on each side of the chassis. For the cooling
system to function properly, the airflow around the chassis must be unrestricted. See
Figure 35 on page 102.
101 Copyright © 2010, Juniper Networks, Inc.
Chapter 5: Rack and Cabinet Requirements