Cisco Systems WSC4507RE96V Synchronizing the Supervisor Engine Configurations, Command Purpose

Chapter 6 Configuring Supervisor Engine Redundancy on the Catalyst 4507R and 4510R Switches

Synchronizing the Supervisor Engine Configurations

client count = 4 client_notification_TMR = 30000 milliseconds

keep_alive TMR = 4000 milliseconds keep_alive count = 1

keep_alive threshold = 7 RF debug mask = 0x0

Switch#

Synchronizing the Supervisor Engine Configurations

During normal operation, the startup-config, boot variables, config-registers, and VLAN database configuration are synchronized by default between the two supervisor engines. In a switchover, the new active supervisor engine uses the current configuration.

To manually synchronize the configurations used by the two supervisor engines, perform this task on the active supervisor engine:

	Command	Purpose
Step 1
	Switch(config)# redundancy	Enters redundancy configuration mode.
Step 2
	Switch(config-red)# main-cpu	Enters main-cpu configuration submode.
Step 3
	Switch(config-r-mc)#auto-sync {startup-config	Synchronizes the configuration elements.
	config-register bootvar standard}
Step 4
	Switch(config-r-mc)# end	Returns to privileged EXEC mode.
Step 5
	Switch# copy running-config startup-config	Forces a manual synchronization of the configuration
		files in NVRAM.
		Note This step is not required to synchronize the
		running configuration file in dynamic
		random-access memory (DRAM).

Note The auto-synccommand controls the synchronization of the CONFIG-REG, BOOTVAR and STARTUP/PRIVATE configuration files only. The calendar and vlan database files are always synchronized when they change.

This example shows how to reenable the default automatic synchronization feature using the auto-sync standard command to synchronize the startup-configand config-registerconfiguration of the active supervisor engine with the standby supervisor engine: updates for the boot variables are automatic and cannot be disabled.

Switch(config)# redundancy

Switch(config-red)# main-cpu

Switch(config-r-mc)# auto-sync standard

Switch(config-r-mc)# end

Switch# copy running-config startup-config

Note To manually synchronize individual elements of the standard auto-sync configuration, disable the default automatic synchronization feature.

	Software Configuration Guide—Release 12.2(20)EW
78-16453-01 A1		6-5