Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual page 1135

redundancy (Graceful Switchover)
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Copyright © 2010, Juniper Networks, Inc.
redundancy {
graceful-switchover;
}
[edit chassis]
Statement introduced in Junos OS Release 9.2 for EX Series switches.
For EX4200 switches configured as a Virtual Chassis and for EX8200 switches with more
than one Routing Engine, enable redundant Routing Engines.
The remaining statement is explained separately.
Redundancy is enabled for the Routing Engines.
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.
Configuring Graceful Routing Engine Switchover in an EX4200 Virtual Chassis (CLI
Procedure) on page 1005
Installing Software on an EX8200 Switch with Redundant Routing Engines (CLI
Procedure) on page 85
Chapter 42: Configuration Statements for EX4200 Virtual Chassis
1031