Disabled State

The initial, default state for high availability mode is disabled. While in this state, the router continues to use file system synchronization. If a switchover occurs while the router is in this state, the standby SRP module performs a cold restart.

The router enters this state when you power up the router or when the router warm-restarts from an SRP switchover.

Once you enable high availability, the system must meet the following criteria before it can enter the initializing state:

• High availability mode is configured.
• Active SRP hardware supports high availability.
• Network core dump feature is disabled.
• Running configuration will allow high availability to operate (that is, no unsupported applications are configured).
• Standby SRP hardware supports high availability.
• Standby SRP module is online and capable of mirroring.
• Standby SRP module is running the same release.

During the disabled state:

• If any one criterion is not met, the system remains in the disabled state, until the criterion is met.
• If a switchover occurs while the system is in the disabled state, the system cold-restarts.

While in the disabled state, the system operates as if it were configured for file system synchronization (for example, NVS is synchronized every 5 minutes, if autosynchronization is enabled).

If all criteria are met, high availability mode transitions to the initialization state.

Copyright © 2008, Juniper Networks, Inc. All rights reserved. Trademark Notice.