Preprovisioned - Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual

Complete Software Guide for Junos
Basic Configuration of a Virtual Chassis with Master and Backup Switches
Expanding Configurations—Within a Single Wiring Closet and Across Wiring Closets
Global Management of Member Switches in a Virtual Chassis
892
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OS for EX Series Ethernet Switches, Release 10.4
Global Management of Member Switches in a Virtual Chassis on page 892
High Availability Through Redundant Routing Engines on page 893
Adaptability as an Access Switch or Distribution Switch on page 893
To take advantage of the Virtual Chassis configuration's higher bandwidth capacity and
software redundancy features, you need to interconnect at least two EX4200 switches
in a Virtual Chassis configuration. You can start with a default configuration, composed
of two EX4200 member switches interconnected through the dedicated 64-Gbps Virtual
Chassis ports (VCPs) on their rear panels. These ports do not have to be configured. They
are operational as soon as the member switches are powered on. See "Example:
Configuring an EX4200 Virtual Chassis with a Master and Backup in a Single Wiring
Closet" on page 917 for additional information.
As your needs grow, you can easily expand the Virtual Chassis configuration to include
more member switches. Within a single wiring closet, simply add member switches by
cabling together the dedicated VCPs. For more information about expanding Virtual
Chassis configurations within a single wiring closet, see "Example: Expanding an EX4200
Virtual Chassis in a Single Wiring Closet" on page 922 and "Example: Setting Up a
Multimember EX4200 Virtual Chassis Access Switch with a Default Configuration" on
page 927.
You can also expand a Virtual Chassis configuration beyond a single wiring closet.
Interconnect switches located in multiple wiring closets or in multiple data center racks
by installing the optional SFP, SFP+, or XFP uplink modules and connecting the uplink
module ports or by connecting the 1-gigabit network interfaces in an EX4200-24F switch.
To use SFP, SFP+, and XFP uplink module ports or EX4200-24F network interfaces for
interconnecting member switches, you must first explicitly configure them as Virtual
Chassis ports (VCPs). See "Example: Configuring an EX4200 Virtual Chassis
Interconnected Across Multiple Wiring Closets" on page 932 for detailed information.
When you are creating a Virtual Chassis configuration with multiple members, you might
want to deterministically control the role and member ID assigned to each member
switch. You can do this by creating a preprovisioned configuration. See "Example:
Configuring an EX4200 Virtual Chassis Using a Preprovisioned Configuration File" on
page 952 for more information.
You can add switches to a preprovisioned configuration by using the autoprovisioning
feature to automatically configure the uplink module ports as VCPs on the switches
being added. See "Adding a New Switch to an Existing EX4200 Virtual Chassis (CLI
Procedure)" on page 986 for detailed information.
The interconnected member switches in a Virtual Chassis configuration operate as a
single network entity. You run EZSetup only once to specify the identification parameters
for the master, and these parameters implicitly apply to all members of the Virtual Chassis
configuration. You can view the Virtual Chassis configuration as a single device in the
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