Cisco Catalyst 4500 Series Command Reference Guide

2-451
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
OL-27596 -01
Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
main-cpu
main-cpu
To enter the main CPU submode and manually synchronize the configurations on the two supervisor
engines, use the main-cpu command.
main-cpu
Syntax Description This command has no arguments or keywords.
Defaults This command has no default settings.
Command Modes Redundancy mode
Command History
Usage Guidelines The main CPU submode is used to manually synchronize the configurations on the two supervisor
engines. From the main CPU submode, use the auto-sync command to enable automatic synchronization
of the configuration files in NVRAM.
Note After you enter the main CPU submode, you can use the auto-sync command to automatically
synchronize the configuration between the primary and secondary route processors based on the primary
configuration. In addition, you can use all of the redundancy commands that are applicable to the main
CPU.
Examples This example shows how to reenable the default automatic synchronization feature using the auto-sync
standard command to synchronize the startup-config and config-register configuration of the active
supervisor engine with the standby supervisor engine. The 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
Switch#
Related Commands
Release Modification
12.1(12c)EW Support for this command was introduced on the Catalyst 4500 series switch.
(Catalyst 4507R only).
Command Description
auto-sync Enables automatic synchronization of the configuration
files in NVRAM.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E