<MainAP>system-view
Enter system view, return user view with Ctrl+Z.
[MainAP]wlan
[MainAP-wlan-view]sta-ipv6-service enable
[MainAP-wlan-view]quit
[MainAP]quit
<MainAP>save
The current configuration will be written to the next startup configuration. Continue? (y/n)[n]:y
 It will take several minutes to save configuration file, please wait.......
 Configuration file has been saved successfully
 Note: The configuration file will take effect after being activated
<MainAP>