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Cisco 8821 Handsets

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  • 1.  Cisco 8821 Handsets

    Posted Jul 13, 2017 05:48 PM

    We are testing the Cisco 8821 handsets without much luck.  Phones will have weak signal, drop their registration randomly, and not roam seamlessly.  Tested all the firmware up to the most current as of today.

     

    The 7925 phones work great, but are becoming hard to source now.  Heard from several vendors many people are still hvaing issues with the 8821s still.

     

    Has anyone successfully deployed these?  What changes did you have to make to the VAP profile for successful utilization of these handsets?

     

    We're running 6.4.4.12 on a pair of 7210 controllers, with about 140 205 APs.  CUCM is 9.1.2 



  • 2.  RE: Cisco 8821 Handsets

    EMPLOYEE
    Posted Jul 13, 2017 07:13 PM
    Encryption? The same WLAN as the 7925s? What band?


  • 3.  RE: Cisco 8821 Handsets

    Posted Jul 14, 2017 01:15 PM

    Auth is WPA2, encryption is AES

    Same WLAN, yes.

    Both the 7925s and 8821s are riding on 5GHz



  • 4.  RE: Cisco 8821 Handsets

    Posted Aug 22, 2017 03:05 PM

    Any update on this from anyone?



  • 5.  RE: Cisco 8821 Handsets

    Posted Nov 26, 2018 04:02 PM

    I too am dealing with this with the 8821s and a large deployment of mostly AP 315s.  On a support call now with Aruba.  I will post an update if I find out anything.  Pray for me.  



  • 6.  RE: Cisco 8821 Handsets

    Posted Nov 26, 2018 05:26 PM

    Well I sat on a call with TAC for about 1.5 hours and a gang of logs were collected .. I will report back with any findings and a hopeful solution. 

     



  • 7.  RE: Cisco 8821 Handsets

    Posted Jan 24, 2019 04:27 PM

    If there is anybody out there with insight into this, help would be much appreciated! Even if it is to say it can't be done! Thank you! Nancy



  • 8.  RE: Cisco 8821 Handsets

    Posted Jan 24, 2019 05:09 PM
    Did you try to disable frame aggregation? I have solved some cases on another vendor with this in combination with 8821.

    https://community.arubanetworks.com/t5/Controller-Based-WLANs/How-to-disable-AMSDU-completely-on-controller/ta-p/393370


  • 9.  RE: Cisco 8821 Handsets

    Posted Jan 27, 2019 11:26 AM

    Any updates about the situation?



  • 10.  RE: Cisco 8821 Handsets

    Posted Apr 22, 2019 09:36 AM
    @AirBubble wrote:
    Did you try to disable frame aggregation? I have solved some cases on another vendor with this in combination with 8821.

    https://community.arubanetworks.com/t5/Controller-Based-WLANs/How-to-disable-AMSDU-completely-on-controller/ta-p/393370

    I haven't really tried this, but I'm not familiar with the setting to know if it is needed in our 7925 deployment.  Can anyone else chime in?



  • 11.  RE: Cisco 8821 Handsets

    EMPLOYEE
    Posted Apr 22, 2019 10:03 AM

    The 8821 has had some bugs.  Please see here to see if a software upgrade would solve your specific issue:  http://www.my80211.com/home/2017/3/4/field-notice-fn-64274-cp-8821-fails-in-wireless-lan-infrastr.html



  • 12.  RE: Cisco 8821 Handsets

    Posted Apr 22, 2019 11:12 AM
    @cjoseph wrote:

    The 8821 has had some bugs.  Please see here to see if a software upgrade would solve your specific issue:  http://www.my80211.com/home/2017/3/4/field-notice-fn-64274-cp-8821-fails-in-wireless-lan-infrastr.html

    I've tried every firmware version, including the latest release of 11.0(5) released on 12 April.  This release causes intermittent freezing of the device, requiring a battery pull to reset.

     

    Our 7925G phones using SCCP work great.  8821's using SIP are a dumpster fire.

     

    We are looking at a different SIP solution for mobile voice at this time.



  • 13.  RE: Cisco 8821 Handsets

    Posted Mar 18, 2022 03:34 PM
    HI all,
    quite an old post here but I´m still facing that issue with 8821 ip-phones... :(
    did anyone find a solution/configuration on WLAN side in which that phones work without problems?
    Original Message