Cisco Systems 15530 About the Software Configuration Register

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Cisco ONS 15530 Configuration Guide and Command Reference
78-14227-01, Cisco IOS Release 12.1(10)EV2
Chapter3 Initial Configuration
About the Software Configuration Register
Example
The following example shows the privileged EXEC mode access status on the standby CPU switch
module:
Switch# show redundancy
Redundant system information
----------------------------
Available Uptime: 15 hours, 27 minutes
sysUpTime (switchover clears): 15 hours, 27 minutes
Switchover Count: 0
Inter-CPU Communication State: DOWN
Last Restart Reason: Normal boot
Last Running Config sync: never
Running Config sync status: Disabled
Last Startup Config sync: never
Startup Config sync status: Disabled
This CPU is the Active CPU.
-------------------------------
Slot: 5
Time since CPU Initialized: 15 hours, 27 minutes
Image Version: ONS-15530 Software (ONS15530-I-M), Release 12.1(10)EV2
Image File: ons15530-i-mz.evt
Software Redundancy State: ACTIVE
Hardware State: ACTIVE
Hardware Severity: 0
Peer CPU is the Standby CPU.
-------------------------------
Slot: 6
Time since CPU Initialized: Unknown, peer CPU not responding
Image Version: Unknown, peer CPU not responding
Image File (on sby-CPU): Unknown, peer CPU not responding
Software Redundancy State: DISABLED
Hardware State: NOT PLUGGED IN
Hardware Severity: 0
Privilege Mode: Enabled
About the Software Configuration Register
The Cisco ONS 15530 uses a 16-bit software configuration register to set specific system parameters.
Settings for the software configuration register are written into NVRAM (nonvolatile random access
memory).
You can change the software configuration register settings for the following reasons:
•Force the system into the ROM monitor or boot ROM
•Select a boot source and default boot filename
•Enable or disable the break function
•Control broadcast addresses
•Set the console terminal baud rate
•Load operating software from Flash memory