Cisco 7921 IP Phone frequently getting disconnected from Wireless
Facing one issue at one my site, while users are roaming with their Cisco 7921 IP Phone they are frequently getting disconnected and phone is giving this message "Leaving Service Area". Recently CUCM has been upgraded to Version 9 from CUCM 6. Current WLC Model is 4402 and Version is 4.X. Below i am mentioning all the details....response really appreciated.
Cisco 4400 Series WLAN Controller AIR-WLC4402-50-K9 Software Version: 184.108.40.206
AP/LAP: Cisco AIR-LAP1252AG-E-K9
IPT Information Firmware Version for IP Phone:cp7921g-220.127.116.11.loads cucm version: 18.104.22.16800-12
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.