You can migrate a Web server from supporting an earlier version of WebSphere Application Server to support the current version.
The plug-in configuration file (plugin-cfg.xml) generated after successful migration from Version 5.x to Version 6.0.x is topology centric—that is, it includes all the applications within a cell. You cannot manage this cell-wide plug-in configuration file from the Version 6.0.x administrative console. It can be managed using the GenPluginCfg command or by using the Plug-in Config Generator MBean.
Be aware that regenerating the plug-in configuration can overwrite manual configuration changes that you might want to preserve.
The application-centric generation of the plugin-cfg.xml file is supported using the Version 6.x administrative console. Being application centric means that the plugin-cfg.xml file generated in the administration console has a granularity that allows each application to be mapped to its specific Web or application server.
To set up the administrative console so that you can use it to manage the Web server plug-in configuration, you must first create a default Web server configuration and then use the administrative console to add the plug-in properties from your migrated plugin-cfg.xml file to this Web server configuration.
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