CMM Redundancy
Chassis Management Module (CMM)
page 3-10
OmniSwitch 8800 Hardware Users Guide
December 2004
Redundant CMM Failover
Synchronizing the Primary and Secondary CMMs
CMM synchronization refers to the process of copying all files in the
/flash/working
and
/flash/certified
directories of the primary CMM to the
/flash/working
and
/flash/certified
directories of the secondary
CMM. This ensures that the these directories match exactly on both modules, which prevents the second-
ary CMM from assuming the primary role with incorrect or outdated software or configuration files in the
event of a primary CMM failure.
Important.
In order to have effective CMM redundancy, CMMs must be synchronized at all times.
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CMM A
(Primary)
CMM B
(Secondary)
CMM B
(Primary)
CMM A fails or
is taken offline