Field Notice: FN - 64274 - CP-8821 Fails in Wireless LAN Infrastructures-Software Upgrade Required

Saturday, March 4, 2017 at 2:45PM
George

We recently deployed 8821 phones in our environment. The past few weeks have been a challenge for us because of these issues. Most of our issues have subsided with the code update and configuration and code changes. 

NOTICE: 

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Revision History

Products Affected

Problem Description

CP-8821 wireless phones deployed in Wireless LAN (WLAN) infrastructures do not work properly. The issues are caused by both 8821 phone and WLAN software bugs.

Background

CP-8821 new wireless phone adoption guidelines are not followed.

Problem Symptoms

Customers that deploy the 8821 in new and established WLAN infrastructures see these issues:

• Poor voice quality
• Audio gaps
• Lost registration
• Problems with roaming
• User interface hangs/restarts 

   

Workaround/Solution

Software updates and configuration modifications are required for Unified Communications Manager, the Cisco WLAN Controller, and the 8821 Wireless Phone. While these modifications will not resolve all known issues, they do address the most critical problems. It is HIGHLY recommended that the customer becomes familiar with instructions and content of the 8821 Wireless Deployment Guide found on Cisco.com.

Unified Communications Manager
- Recommend Version 10.5(2), 11.0(1), 11.5(1), and later

Unified Survivable Remote Site Telephony (SRST)
- Recommend Version 11.0, 11.5, and later

Unified Communications Manager Express: 10.x, 11.x, and later
- Recommend Version 11.0, 11.5, and later

Hosted Collaboration Solution (HCS): 9.x, 10.x, 11.x, and later 
- Recommend Version 11.0, 11.5, and later

Wireless LAN Controller (WLC) and Access Points (APs) 
- Refer to the 8821 Wireless Deployment Guide for supported AP listings. Any AP model that is not listed in the deployment guide is not supported.

Cisco WLC and Cisco Lightweight APs
- Recommend at least Version 8.0.140.0, 8.2.141.0, or later 
- For the latest code recommendations for the AireOS based Cisco WLC, also refer to TAC Recommended AireOS Builds.

Cisco Meraki Access Points
MR18, MR24, MR26, MR32, MR34, MR42, MR52, and MR53 indoor AP platforms and the Cisco Meraki MR72 outdoor AP platform only. 

Cisco Autonomous APs
- Recommend Version 12.4(25d)JA2, 15.2(4)JB6, and 15.3(3)JD

8821 Wireless Phone
- Recommend latest Software Release 11.0(3) SR1 or later

Refer to the 8821 Wireless Deployment Guide for all settings, configurations, and troubleshooting recommendations.

These commands must be issued on all Cisco WLCs as a workaround for Cisco bug ID  CSCvd06463 - IOS AP doing AMSDU aggregation for voice traffic in queue 0 despite BA req declined by 8821:

These are the commands for 5 GHz, if Cisco 8821 on 5 GHz is used:

• config 802.11a disable network
• config 802.11a 11nSupport a-msdu tx priority all disable 
• config 802.11a enable network 

These are the commands for 2.4 GHz, if Cisco 8821 on 2.4 GHz is used:

• config 802.11b disable network
• config 802.11b 11nSupport a-msdu tx priority all disable
• config 802.11b enable network 

   

CDETS

To follow the bug ID link below and see detailed bug information, you must be a registered customer and you must be logged in.

Compliance Hold

In order to ensure successful deployment of the 8821, these actions must be taken before Sales Orders are released:

1. Perform a Wireless Network Site Survey.
2. If a partner is responsible for the installation, verify that the partner has certification for Voice over WLAN.
3. Confirm that the wireless infrastructure (WLC, APs, and so on) runs on the latest released version of the firmware.

 

Article originally appeared on my80211.com (http://www.my80211.com/).