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Activating High Availability
You activate high availability (stateful SRP switchover)
by launching Redundancy Configuration mode and issuing the mode high-availability command.
When activating high availability, keep the following
in mind:
- In an E-series router that supports stateful SRP switchover,
both SRP modules must be running the same software release version
in order to activate high availability mode.
- If high availability mode cannot become active because
of different releases on the active and standby SRP modules, the system
reverts to its default mode (file system synchronization).
- When active or pending, the router configuration files
are mirrored from the active SRP module to the standby SRP module.
All other files shared between the active and standby SRP modules
are automatically synchronized using legacy synchronization methods.
To enable high availability, enter the following:
- host1(config)#redundancy
- host1(config-redundancy)#mode high-availability
mode
- Use the redundancy mode command
to enable high availability.
- The high-availability keyword
enables high availability mode for stateful SRP switchover. In this
mode, the router uses mirroring to keep the configuration and state
of the standby SRP module coordinated with the configuration and state
of the active SRP module.
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Note:
High availability mode is currently available only on ERX-1440,
ERX-1400, and ERX-700 routers that support dual SRPs.
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- The file-system-synchronization keyword reverts the redundancy mode to its default. In this mode,
the router uses file synchronization to keep the configuration of
the standby SRP module coordinated with the configuration of the active
SRP module.
- Example
- host1(config-redundancy)#mode high-availability
- Use the no version to return
high availability mode operation to its default (file system synchronization).
- See mode.
redundancy
- Use to enter Redundancy Configuration mode.
- Example
- host1(config)#redundancy
- host1(config-redundancy)#
- There is no no version.
- See redundancy.
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