Cisco Systems 78-16019-02 manual About the Software Configuration Register, Down

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Chapter 3 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 summary

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)EV
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


		Cisco ONS 15530 Configuration Guide and Command Reference
		Cisco ONS 15530 Configuration Guide and Command Reference
	78-16019-02, Cisco IOS Release 12.2(18)SV2			3-25
	78-16019-02, Cisco IOS Release 12.2(18)SV2			3-25

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Contents About the CPU Switch Module Initial ConfigurationYou can now begin configuring the CPU switch module Using the Console Ports, NME Ports, and Auxiliary PortsStarting Up the Cisco ONS You see the following user Exec promptEnable Password About PasswordsEnable Secret Password Modem SupportCommand Purpose Configuring IP Access on the NME InterfaceDisplaying the NME Interface Configuration Displaying the Operating Configurations Configuring the Host NameSwitch# configure terminal Switchconfig# hostname name Specifies a system nameONS15530# copy systemrunning-config nvramstartup-config Switch# configure terminal Switchconfig# hostname ONS15530About NTP Displaying the NTP Configuration Configuring NTPCommand Example PurposeConfiguring AAA Configuring Security FeaturesConfiguring Authentication Configuring AuthorizationConfiguring Radius Configuring KerberosConfiguring Traffic Filters and Firewalls Configuring TACACS+Configuring Passwords and Privileges About CPU Switch Module Redundancy State Description CPU Switch Module State Transition DiagramRedundant Operation Requirements Forcing a Switchover from Privileged Exec Mode Configuring CPU Switch Module RedundancyRedundancy switch-activity force Switchover Forcing a Switchover from ROM Monitor ModeDisplaying the Autoboot Configuration Configuring AutobootSwitchconfig# config-register Bootflash filenameSynchronizing Configurations Manually Synchronizing the ConfigurationsFollowing example shows the contents of the boot variable Switchconfig-red# no auto-sync running-config Filename When SynchronizedSwitchconfig-red# no auto-sync startup-config Enabling and Disabling Automatic SynchronizationShow redundancy running-config-file Configuring Maintenance ModeShow redundancy summary Show redundancy capabilityExamples Switch# show redundancy summarySwitch# show redundancy capability Following example shows the CPU switch module capabilitiesSby-Switch#show redundancy running-config-file Reloading the CPU Switch ModulesSwitch# redundancy reload peer Enables access to privileged Exec mode from Switchconfig-red# standby privilege-modeEnable Standby CPU switch module CLI. The default stateDown About the Software Configuration Register4describes each of the software configuration register bits Software Configuration Register SettingsBit Number Hexadecimal Description Bit Address nethost Boot Field ValuesBit Baud Rate Boot Command Default System Boot Behavior7describes the values for the boot field Boot Field Value DescriptionVerify the Configuration Register Value Changing the Software Configuration RegisterSwitch# show version Displays the current configuration register valueSwitchconfig# environment-monitor shutdown fan Configuring Fan Failure ShutdownAbout Fan Failure Shutdown Switch# show environment Displaying the Fan Tray Failure Shutdown Configuration78-16019-02, Cisco IOS Release 12.218SV2