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Table 40: Cabinet Requirements and Specifications for an EX8208 Switch (continued)
Guidelines for the EX8208 SwitchCabinetRequirement
Whenyou mount the switchon a cabinet,ensure that
ventilationthrough the cabinetis sufficient toprevent
overheating.Considerthe following requirements list when
planningforchassis cooling:
•
Ensurethat the coolair supplyyou provide throughthe
cabinetadequatelydissipates the thermal output of the
switch (or switches).
•
Ensurethat the cabinetallows the chassishot exhaustair
toexit the cabinetwithout recirculatingintothe switch.An
opencabinet(without a topordoors) thatemployshot air
exhaustextractionfrom the topallowsthe bestairflow
throughthe chassis.If the cabinet containsa topor doors,
perforationsintheseelementsassistwithremovingthehot
air exhaust.For an illustrationof chassis airflow, see
“ClearanceRequirementsfor Airflow and Hardware
Maintenance foran EX8208 Switch” on page101.
•
Theswitchfansexhausthotairthroughtherightsideofthe
chassis(theleftsidewhenyoufacethefrontofthechassis,
wherethefantrayslidesin).Installtheswitchinthecabinet
inawaythatmaximizestheopenspaceonthefantrayside
of the chassis.Thismaximizes the clearance forcritical
airflow.
•
Route and dressall cables tominimize the blockageof
airflow toand from the chassis.
•
Ensurethat the spacingof railsand adjacentracksallows
forthe proper clearance around the switch and rackas
specifiedin “ClearanceRequirements forAirflowand
HardwareMaintenanceforanEX8208Switch”onpage101.
Cabinetairflowrequirements
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
ClearanceRequirementsforAirflowand HardwareMaintenance foranEX8208 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.
101Copyright©2010, JuniperNetworks, Inc.
Chapter5:Rackand CabinetRequirements