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Guidelines for Deactivating High Availability
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Deactivating High Availability
Copyright © 2010, Juniper Networks, Inc.
line-card switch
show redundancy history
show redundancy line-card
You can disable high availability for line modules by launching Redundancy Configuration
mode and issuing the no mode high-availability slot command. In the redundancy mode,
the spare line module to take control of the IOA associated with the failed line module
in the redundancy group. During switchover, the line, circuit, and IP interfaces on one or
more IOAs appear to go down temporarily. This is the default behavior mode for E120
and E320 routers that contain redundant line modules.
Because this mode requires the router to reload the interface configuration and the
routing table from the SRP module, instead of transaction-based mirroring, when the
active line module switches to the standby line module, a disruption occurs in handling
user sessions and traffic forwarding.
Deactivating High Availability on page 89
Stateful Line Module Switchover Modes on page 83
Application Support for Stateful Line Module Switchover on page 79
mode
line-card switch
show redundancy history
show redundancy line-card
When you disable stateful line module switchover, both the primary and standby line
modules are shifted to the online state. Both line module redundancy and stateful
switchover of line modules are disabled. If the router uses redundant line modules, after
you disable high availability, the router uses line module redundancy mode, which is the
default behavior.
To disable high availability support:
From Global Configuration mode, launch Redundancy Configuration mode.
1.
host1(config)#redundancy
In Redundancy Configuration mode, disable high availability on the line module pair
2.
previously configured for stateful switchover
host1(config-redundancy)#no mode high availability slot 11 16
Chapter 4: Managing Stateful Line Module Switchover
89
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