Technical Documentation

Configuring Graceful Routing Engine Switchover

This section contains the following topics:

Enabling Graceful Routing Engine Switchover

By default, graceful Routing Engine switchover is disabled. To configure graceful Routing Engine switchover, include the graceful-switchover statement at the [edit chassis redundancy] hierarchy level.

[edit chassis redundancy]graceful-switchover;

When you enable graceful Routing Engine switchover, the command-line interface (CLI) indicates which Routing Engine you are using. For example:

{master} [edit]user@host#

To disable graceful Routing Engine switchover, delete the graceful-switchover statement from the [edit chassis redundancy] hierarchy level.

Synchronizing the Routing Engine Configuration

Note: A newly inserted backup Routing Engine automatically synchronizes its configuration with the master Routing Engine configuration.

When you configure graceful Routing Engine switchover, you can bring the backup Routing Engine online after the master Routing Engine is already running. There is no requirement to start the two Routing Engines simultaneously.

Verifying Graceful Routing Engine Switchover Operation

To verify whether graceful Routing Engine switchover is enabled, on the backup Routing Engine, issue the show system switchover command. When the output of the command indicates that the Graceful switchover field is set to on, graceful Routing Engine switchover is operational. The status of the kernel database and configuration database synchronization between Routing Engines is also provided. For example:

Graceful switchover: On
Configuration database: Ready
Kernel database: Ready
Peer state: Steady state

Note: You must issue the show system switchover command on the backup Routing Engine. This command is not supported on the master Routing Engine.

For more information about the show system switchover command, see the Junos OS System Basics and Services Command Reference .

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