Of An Ex4200 Virtual Chassis (Cli Procedure); Understanding Nonvolatile Storage In An Ex4200 Virtual Chassis; Understanding Ex4200 Virtual Chassis Link Aggregation - Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual

Complete Software Guide for Junos

Understanding Nonvolatile Storage in an EX4200 Virtual Chassis

Nonvolatile Memory Features
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Documentation
Understanding the High-Speed Interconnection of the EX4200 Virtual Chassis Members
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Documentation

Understanding EX4200 Virtual Chassis Link Aggregation

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OS for EX Series Ethernet Switches, Release 10.4
Configuring the Virtual Management Ethernet Interface for Global Management of an
EX4200 Virtual Chassis (CLI Procedure) on page 999
The Juniper Networks EX4200 Ethernet Switch stores the Juniper Networks Junos
operating system (Junos OS) system files in internal flash memory. In an EX4200 Virtual
Chassis configuration, both the master and the backup switch store the configuration
information for all the member switches.
Nonvolatile Memory Features on page 902
The Junos OS optimizes the way the Virtual Chassis stores its configuration if a member
switch or the Virtual Chassis configuration is shut down improperly:
If the master is not available, the backup switch takes on the role of the master and
its internal flash memory takes over as the alternate location for maintaining nonvolatile
configuration memory.
If a member switch is taken offline for repair, the master stores the configuration of
the member switch.
Command Forwarding Usage with an EX4200 Virtual Chassis on page 1007
Monitoring System Properties on page 650
Two high-speed Virtual Chassis ports (VCPs) on the rear panel of the Juniper Networks
EX4200 Ethernet Switches enable the EX4200 Virtual Chassis members to be
interconnected and operate as a single, powerful switch. Each VCP interface is 32 Gbps
bidirectional. When VCP interfaces are used to form a ring topology, each segment
provides 64 Gbps bidirectional bandwidth. Because the VCP links act as point-to-point
links, multiple segments of the ring can be used simultaneously. This allows the Virtual
Chassis configuration bandwidth to scale as you interconnect more members within the
ring topology.
Understanding EX4200 Virtual Chassis Components on page 893
Virtual Chassis Cabling Configuration Examples for EX4200 Switches
You can combine physical Ethernet ports belonging to different member switches of an
EX4200 Virtual Chassis configuration to form a logical point-to-point link, known as a
link aggregation group (LAG) or bundle. A LAG provides more bandwidth than a single
Ethernet link can provide. Additionally, link aggregation provides network redundancy by
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