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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 12 Configuring Supervisor Engine Redundancy Using RPR and SSO on Supervisor Engine 7-E, Supervisor
Configuring Supervisor Engine Redundancy
Connecting to standby virtual console
Type "exit" or "quit" to end this session
Switch-standby-console# exit
Switch#
If the standby console is not enabled, the following message appears:
Switch-standby-console#
Standby console disabled.
Valid commands are: exit, logout
Note The standby virtual console provides the standard features that are available from the supervisor console
such as command history, command completion, command help and partial command keywords.
The following limitations apply to the standby virtual console:
• All commands on the virtual console run to completion. It does not provide the auto-more feature;
it behaves as if the terminal length 0 command has been executed. It is also non-interactive.
Therefore, a running command cannot be interrupted or aborted by any key sequence on the active
supervisor engine. If a command produces considerable output, the virtual console displays it on the
supervisor engine screen.
• The virtual console is non-interactive. Because the virtual console does not detect the interactive
nature of a command, any command that requires user interaction causes the virtual console to wait
until the RPC timer aborts the command.
The virtual console timer is set to 60 seconds. The virtual console returns to its prompt after 60
seconds. During this time, you cannot abort the command from the key board. You must wait for the
timer to expire before you continue.
• You cannot use virtual console to view debug and syslog messages that are being displayed on the
standby supervisor engine. The virtual console only displays the output of commands that are
executed from the virtual console. Other information that is displayed on the real standby console
does not appear on the virtual console.
Synchronizing the Supervisor Engine Configurations
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 |
config-register | bootvar | standard}
Synchronizes the configuration elements.
Step 4
Switch(config-r-mc)# end
Returns to privileged EXEC mode.
Step 5
Switch# copy running-config startup-config
Synchronizes the running configuration in dynamic
random-access memory (DRAM) to the startup
configuration file in NVRAM.
Note This step is not required to synchronize the
running configuration file in (DRAM).
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