A host is already configured to access the network, and the administrator would like to configure a second adapter on the same system. This adapter should be permanently configured so that the new…

ifconfig applies changes only to the live running system; no changes are written to the ODM, so all configuration is lost upon reboot.

ipconfig is a Windows command-line tool and does not exist in the AIX operating system environment.

mktcpip is designed for the initial, one-time TCP/IP setup of a system including hostname and default route; it is not intended for adding and permanently configuring additional network adapters.

The chdev command with the -P (permanent) flag stores the network adapter attributes directly into the ODM (Object Data Manager), so the configuration is reapplied automatically at every system boot. This is the correct approach for adding a second adapter permanently because it targets only the specified device without disrupting existing interface configurations or requiring a full TCP/IP reinitialize.