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Upgrade/Downgrade Guide, Cisco ACE 4700 Series Application Control Engine Appliance
OL-25719-01
Upgrading Your ACE Software in a Redundant Configuration
Changing the www User Password
Before you upgrade the ACE software, you
must
change the default www user password if you have not
already done so. Otherwise, after you upgrade the ACE software, the www user password will be
disabled and you will not be able to use Extensible Markup Language (XML) to remotely configure an
ACE until you change the default www user password.
For details on changing a user account password, see Chapter 2, Configuring Virtualization, in the
Virtualization Guide, Cisco ACE Application Control Engine
. In this case, the username is
www
.
Caution
If you do not change the www user password prior to upgrading the ACE software, the configuration
synchronization may fail and the context may not be in the STANDBY_HOT state.
Removing the duplex Command from the ACE Configuration
As a result of a
duplex
command syntax change between A3(2.1) and A3(2.2), if your ACE
configuration includes one or more Gigabit Ethernet ports that are configured for full or half duplex
operation, before you upgrade from A3(2.1) to A3(2.2), or A3(2.2) to software version A3(2.3) or later,
you must first remove the duplex configuration from the startup-configuration file on both the active
ACE and standby (peer) ACE.
Perform the following configuration change on both the active ACE and standby (peer) ACE before you
begin the upgrade procedure:
Step 1
Use the
no
form of the
duplex
command in interface configuration mode to remove the duplex
configuration from all configured Gigabit Ethernet ports.
Step 2
Use the
copy running-config startup-config
command to save the changes from the
running-configuration file to the startup-configuration file.
After you complete the upgrade procedure, you can update the duplex settings for the configured Gigabit
Ethernet ports using software version A3(2.3) or later. See Chapter 1, Configuring Ethernet Interfaces,
in the
Routing and Bridging Guide, Cisco ACE Application Control Engine.
Removing the Underscore Character from a Hostname
Before you upgrade the ACE appliance software from A3(2.0) to A4(1.0) or later as a result of
addressing CSCsr90184, the underscore character (_) is no longer allowed in the hostname. As a result
of this change, if you do not modify a hostname by removing the underscore character (_), after you
perform an upgrade, the standby ACE remains in the STANDBY_COLD state because the configuration
cannot synchronize with the illegal character.
Creating a Checkpoint
We strongly recommend that you create a checkpoint of the running-configuration of each context in
your ACE. A checkpoint creates a snapshot of your configuration that you can later roll back to in case
a problem occurs with an upgrade and you want to downgrade the software to a previous version. Use
the
checkpoint create
command in Exec mode in each context for which you want to create a
configuration checkpoint and name the checkpoint. For details about creating a checkpoint and rolling
back a configuration, see the
Administration Guide, Cisco ACE Application Control Engine
.
