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JunosE 11.3.x Service Availability Configuration Guide
Initializing State
Active State
86
The behavior of the router depends on which HA state the application is in when it shifts
to a disabled state:
From initializing state—The router completes the initializing state and transitions to
the active state after initialization is complete.
Active State—The router transitions to the disabled state.
NOTE: You can use the show redundancy line-card command to display the
name of any unsupported applications that are configured.
While in the disabled state, the system operates as if it were configured for redundancy
functionality.
If all criteria are met, high availability mode transitions to the initialization state.
After the line module transitions into the initializing state, bulk synchronization of the
memory occurs. This activity consists of mirroring of appropriate state and dynamic
configuration information from the active line module (memory) to the standby line
module (memory). Depending on the size of the configuration, this process can take
several minutes.
During the initializing state:
If an unsupported application is configured during initialization, the system completes
initializing and enters the disabled state.
If any other criterion becomes false (or is no longer met), the system enters the disabled
state.
If a switchover occurs while the system is in this state, the system undergoes a
cold-switchover.
After initialization is completed, the system enters the active state.
During the active state, the data that was synchronized from the active line module to
the standby line module during initialization remains synchronized through mirroring
updates.
Mirroring updates occur as follows:
When making changes or updates, applications create individual transactions, perform
1.
the updates on the active line module, and post the transactions.
Following the updates, the active line module sends the changes to the standby line
2.
module.
Copyright © 2010, Juniper Networks, Inc.
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