Juniper Networks EX4200 - Manual (Page 129)

Virtual Chassis Cabling Configuration Examples for EX4200 Switches
You can install EX4200 switches in a single rack or multiple racks, or in different
wiring closets, and interconnect them to form a Virtual Chassis. There are two
dedicated Virtual Chassis ports (VCPs) on the rear panel of the EX4200 switch that
are used exclusively to interconnect EX4200 switches as a Virtual Chassis. The
physical location of the switches in a Virtual Chassis is restricted only by the maximum
length supported for cables to connect the VCPs. The maximum cable length for
interconnecting the dedicated VCPs is 5 meters. If you want to interconnect EX4200
switches that are located beyond the reach of the dedicated VCP cables, you can
install the XFP uplink module, the SFP uplink module, or the SFP+ uplink module
and set the uplink module ports as VCP interfaces. See Setting an Uplink Module Port
as a Virtual Chassis Port (CLI Procedure).
NOTE: The interfaces for the two dedicated VCPs are operational by default. However,
if you are using the uplink module ports as VCPs, you must explicitly set the uplink
module ports to function as VCPs.
The following illustrations describe various Virtual Chassis cabling configuration
examples.
NOTE: For increased availability and redundancy, we recommend that you always
configure your Virtual Chassis in a ring topology.
Figure 31 on page 103 and Figure 32 on page 104 show five EX4200 switches stacked
vertically in a rack and interconnected in a ring topology using four short Virtual
Chassis cables and one long Virtual Chassis cable.
Figure 31: EX4200 Switches Mounted on a Single Rack and Connected in a Ring
Topology Using Short and Long Cables: Option 1
Virtual Chassis Cabling Configuration Examples for EX4200 Switches ■ 103
Chapter 8: Planning the Virtual Chassis