Juniper JUNOS OS 10.3 - SOFTWARE Manual page 1060

Complete Software Guide for Junos
Overview and Topology
964
®
OS for EX Series Ethernet Switches, Release 10.3
Before you interconnect the members of the Virtual Chassis configuration across wiring
closets, be sure you have:
Installed an uplink module in each member switch. See Installing an Uplink Module
1.
in an EX3200 or EX4200 Switch.
Powered on, connected, and run the EZSetup program on SWA-0 (see Table 147 on
2.
page 965 for switch names used in this example). See "Connecting and Configuring an
EX Series Switch (CLI Procedure)" on page 187 or "Connecting and Configuring an EX
Series Switch (J-Web Procedure)" on page 189 for details.
Configured SWA-0 with the virtual management Ethernet (VME) interface for remote,
3.
out-of-band management of the Virtual Chassis configuration, if desired. See
"Configuring the Virtual Management Ethernet Interface for Global Management of
a Virtual Chassis (CLI Procedure)" on page 1027.
Interconnected SWA-0 and SWA-1 using the dedicated VCPs on the rear panel. SWA-1
4.
must not be powered on at this time.
Interconnected SWA-2 and SWA-3 using the dedicated VCPs on the rear panel. SWA-2
5.
and SWA-3 must not be powered on at this time.
In this example, four EX4200 switches will be interconnected in a Virtual Chassis
configuration. Two of these (SWA-0 and SWA-1) are located in wiring closet A and the
two other (SWA-2 and SWA-3) are located in wiring closet B.
For ease of monitoring and manageability, we want to interconnect all four switches as
members of a Virtual Chassis configuration. Prior to configuring the Virtual Chassis, we
installed uplink modules in each of the member switches. In this example, uplink modules
are installed in all four members so that there are redundant VCP connections across
the wiring closets. If you want to expand this configuration to include more members
within these wiring closets, you do not need to add any more uplink modules. Simply use
the dedicated VCPs on the rear panel. The redundancy of uplink VCPs provided in this
example is sufficient.
We have interconnected the switches in wiring closet A and also interconnected the ones
in wiring closet B using the dedicated VCPs. The interfaces for the dedicated VCPs are
operational by default. They do not need to be configured.
However, the Virtual Chassis cables that interconnect the dedicated VCPs of member
switches within a single wiring closet are not long enough to connect member switches
across wiring closets. Instead, we will use the fiber-optic cable connections in the uplink
modules to interconnect the member switches in wiring closet A to the member switches
in wiring closet B. You only need to interconnect one member switch in wiring closet A
to one in wiring closet B to form the Virtual Chassis configuration. However, for
redundancy, this example connects uplink module ports from the two member switches
in wiring closet A to the two member switches in wiring closet B.
We will specify the highest mastership priority value (255) for SWA-0 to make it the
master before we power on SWA-1. Because SWA-0 and SWA-1 are interconnected with
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