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Planning the Virtual Chassis
Before installing EX4200 switches in a Virtual Chassis configuration, you must consider
the following factors:
•
Thenumber of switchesin the VirtualChassis and location—Youcan interconnecttwo
to ten EX4200 switches to form a Virtual Chassis. Youcan stack the switches in a
single rack or install them on multiple racks. For information on the size and strength
of racks, see “Rack Requirements for EX3200 and EX4200 Switches”on page 93. See
“Chassis Physical Specifications for EX3200 and EX4200 Switches” on page 7 for
the dimensions and weights of the switch models.
•
Cabling requirements for Virtual Chassis—You can interconnect the EX4200 switches
in a Virtual Chassis configuration through Virtual Chassis ports (VCPs) using the
0.5 meter long VCP cable supplied in the package. Depending on the Virtual Chassis
configurations you have, you might need cables of different lengths.If youneed longer
cables, you can purchase them separately. The maximum length allowed for a Virtual
Chassis cable is 5 meters. To connect switches that are installed farther apart, you
must configure the uplink module ports as Virtual Chassis ports and use them to
interconnect the switches.
NOTE: If you order Virtual Chassis cables separately,you should reuse the locking
covers provided with the original cable or order Virtual Chassis cable locking covers
also separately.
•
Clearance on the rear of the switch—You must have access to the rear of the switch
if you plan to interconnect switches to form a Virtual Chassis.
•
Power supply—You must plan the installation site to meet the power requirements of
the EX Series switches in a Virtual Chassis. The input power requirements vary
depending on the number of Power over Ethernet (PoE) ports in a switch. See “Power
Supply in EX3200 and EX4200 Switches” on page 27 for the power requirements for
the various configurations of PoE ports in EX4200 switches.
Related Topics Understanding Virtual Chassis Components•
• Virtual Chassis Ports Connector Pinout Information for EX4200 Switches on page 81
• Understanding Virtual Chassis Hardware Configuration on an EX4200 Switch on
page 105
• Virtual Chassis Cabling Configuration Examples for EX4200 Switches on page 107
• Clearance Requirements for Airflow and Hardware Maintenance for EX3200 and
EX4200 Switches on page 96
Copyright ©2010,Juniper Networks,Inc.106
CompleteHardwareGuide forEX3200 andEX4200 EthernetSwitches