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Cisco ONS 15530 Configuration Guide and Command Reference
78-16019-02, Cisco IOS Release 12.2(18)SV2
Chapter3 Initial Configuration About CPU Switch Module Redundancy
Figure 3-1 shows the valid hardware transition states for a system with redundant CPU switch modules.
Figure 3-1 CPU Switch Module State Transition Diagram
In response to redundancy events,such as switchovers and reboots of the active CPU switch module, the
software transitions through a series of software redundancy states. Table3-2 lists some of the
significant software states.
Table3-1 CPU Switch Module Hardware States
State Description
Active Processor card is currently providingclock signals and control for all system
cards. The active CPU switch module responds to the configured
management IP address.
Standby Processor card is partially booted in hot-standby state waiting to switch over
when the active CPU switch module fails, when it is rebooted or removed,
or when a manual switchover is requested.
Nonparticipant Processor card is in ROMMON mode, or is in the process of booting, or has
notyet reached the hot-standby state. Manual switchovers are rejected unless
the force option is used.
Not plugged in Processor card slot is empty.
Error Processor card is present but either the interprocess arbitration interface is
not functioning or the CPU switch module is not fully seated in the chassis
slot.
Nonparticipant
Error
Not plugged in
(processor card
removed)
Active Standby
58645