Cisco ACE-4710-1F-K9 User Guide - Page 13

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 Step 2 Use the no form of the duplex command in interface configuration mode to remove the duplex configuration from all configured Gigabit Ethernet ports. 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. OL-25719-01 Upgrade/Downgrade Guide, Cisco ACE 4700 Series Application Control Engine Appliance 13