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Cold boot
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The SRP module or line module loads diagnostics from the flash
file system and runs them. When the diagnostics successfully complete,
the operational image is loaded from the flash file system and then
cold started.
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Cold start
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The SRP module or line module is initialized from the loaded
operational image. The line modules are reloaded and the configuration
is read from flash memory. When the line modules are operational,
their configuration data is bulk downloaded and their interfaces become
operational.
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Cold restart
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If the active SRP module fails, the standby SRP module assumes
the role of active SRP module. When high availability is not configured,
the cold restart is similar to the cold start, except that the applications
are already loaded into memory on the standby SRP module and ready
to be started. The line modules are reloaded.
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Warm restart
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If the active SRP module fails, the standby SRP module takes
the role of active SRP module. Mirrored configuration data as well
as any mirrored volatile data are already resident in memory. The
line modules continue to forward data (with a small loss of packets
when the fabric is switched from the formerly active SRP module to
the newly active SRP module). The protocols and other applications
re-initialize from the mirrored data and resynchronize communications
with the line modules. When resynchronization is completed, the router
resumes normal operations, including updates of any routing tables
that result from changes that occurred during the warm restart.
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