Virtual Chassis Overview; Understanding Ex9200 Virtual Chassis - Juniper EX9200 Features Manual

CHAPTER 1

Virtual Chassis Overview

Understanding EX9200 Virtual Chassis

Copyright © 2017, Juniper Networks, Inc.
Understanding EX9200 Virtual Chassis on page 15
Understanding EX Series Virtual Chassis Components on page 16
NOTE: For deployments with EX9200 switches, we recommend planning or
moving to MC-LAG or Junos Fusion Enterprise architectures rather than using
a Virtual Chassis. We do not recommend using EX9200 switches in a Virtual
Chassis.
EX9200 Virtual Chassis brings the Virtual Chassis flexible, scaling switch solution to
Juniper Networks EX9200 Ethernet Switches. You can connect two EX9200 switches
into an EX9200 Virtual Chassis and manage the interconnected switches as a single
chassis. The advantages of connecting multiple switches into a Virtual Chassis include
better-managed bandwidth at a network layer, simplified configuration and maintenance
because multiple devices can be managed as a single device, increased fault tolerance
and high availability (HA) because a Virtual Chassis can remain active and network traffic
can be redirected to other member switches when a single member switch fails, and a
flatter, simplified Layer 2 network topology that minimizes or eliminates the need for
loop prevention protocols such as Spanning Tree Protocol (STP).
NOTE: Starting with Junos OS Release 17.1R1, EX9200 switches support
EX9200-RE2 module. You cannot form a Virtual Chassis using an EX9200
switch with an EX9200-RE2 module installed in it.
You configure an EX9200 Virtual Chassis by configuring optical interfaces into Virtual
Chassis ports (VCPs). VCPs connect switches together to form a Virtual Chassis, and
are responsible for passing all data and control traffic between member switches in the
Virtual Chassis.
You can increase VCP bandwidth between member switches by configuring multiple
interfaces between the same two switches into VCPs. When multiple VCPs are
interconnecting the same two member switches, a link aggregation group (LAG) bundle
is automatically formed when the VCPs are on interfaces supporting identical speeds.
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