Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual page 20

Complete Software Guide for Junos
Part 10
Chapter 37
Chapter 38
xx
®
OS for EX Series Ethernet Switches, Release 10.4
EX4200 Virtual Chassis
EX4200 Virtual Chassis-Overview, Components, and Configurations . . 891
EX4200 Virtual Chassis Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 891
Basic Configuration of a Virtual Chassis with Master and Backup
Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 892
Expanding Configurations-Within a Single Wiring Closet and Across Wiring
Closets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 892
Global Management of Member Switches in a Virtual Chassis . . . . . . . . . . 892
High Availability Through Redundant Routing Engines . . . . . . . . . . . . . . . . . 893
Adaptability as an Access Switch or Distribution Switch . . . . . . . . . . . . . . . 893
Understanding EX4200 Virtual Chassis Components . . . . . . . . . . . . . . . . . . . . . 893
Virtual Chassis Ports (VCPs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 894
Master Role . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 894
Backup Role . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 895
Linecard Role . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 895
Member Switch and Member ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 896
Mastership Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 896
Virtual Chassis Identifier (VCID) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 897
Understanding How the Master in an EX4200 Virtual Chassis Is Elected . . . . . 898
Understanding Software Upgrade in an EX4200 Virtual Chassis . . . . . . . . . . . . 898
Understanding Global Management of an EX4200 Virtual Chassis . . . . . . . . . . 899
Understanding Nonvolatile Storage in an EX4200 Virtual Chassis . . . . . . . . . . . 902
Nonvolatile Memory Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 902
Understanding the High-Speed Interconnection of the EX4200 Virtual Chassis
Members . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 902
Understanding EX4200 Virtual Chassis Link Aggregation . . . . . . . . . . . . . . . . . . 902
Understanding EX4200 Virtual Chassis Configuration . . . . . . . . . . . . . . . . . . . . 904
Understanding EX4200 Virtual Chassis Switch Version Compatibility . . . . . . . . 905
Understanding Fast Failover in an EX4200 Virtual Chassis . . . . . . . . . . . . . . . . . 906
Supported Topologies for Fast Failover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 906
How Fast Failover Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 906
Fast Failover in a Ring Topology using Dedicated VCPs . . . . . . . . . . . . 906
Fast Failover in a Ring Topology Using Uplink Module VCPs . . . . . . . . . 908
Fast Failover in a Virtual Chassis Configuration Using Multiple Ring
Topologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 910
Effects of Topology Changes on a Fast Failover Configuration . . . . . . . . . . . 911
Understanding Split and Merge in an EX4200 Virtual Chassis . . . . . . . . . . . . . . . 912
What Happens When an EX4200 Virtual Chassis Configuration Splits . . . . 912
Merging EX4200 Virtual Chassis Configurations . . . . . . . . . . . . . . . . . . . . . . 913
Understanding Automatic Software Update on EX4200 Virtual Chassis Member
Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 915
EX4200 Virtual Chassis-Configuration Examples . . . . . . . . . . . . . . . . . . . . 917
Example: Configuring an EX4200 Virtual Chassis with a Master and Backup in
a Single Wiring Closet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 917
Example: Expanding an EX4200 Virtual Chassis in a Single Wiring Closet . . . . . 922
Example: Setting Up a Multimember EX4200 Virtual Chassis Access Switch
with a Default Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 927
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