The Cisco IP Phone 8861 and 8865 utilize active mode primarily, but if there is an associated client that is in power save mode,
then all multicast packets will be queued until the DTIM period.
With multicast, there is no guarantee that the packet will be received the by the client.
The multicast traffic will be sent at the highest mandatory / basic data rate enabled on the access point, so will want to ensure
that only the lowest enabled rate is configured as the only mandatory / basic rate.
The client will send the IGMP join request to receive that multicast stream. The client will send the IGMP leave when the
session is to be ended.
The Cisco IP Phone 8861 and 8865 support the IGMP query feature, which can be used to reduce the amount of multicast traffic
on the wireless LAN when not necessary.
Ensure that IGMP snooping is also enabled on all switches.
Note: If using Coexistence where 802.11b/g/n and Bluetooth are being used simultaneously, then multicast voice is not
supported.
Configuring the Cisco Wireless LAN
Cisco Wireless LAN Controller and Lightweight Access Points
When configuring the Cisco Wireless LAN Controller and Lightweight Access Points, use the following guidelines:
• Ensure 802.11r (FT) or CCKM is Enabled
• Set Quality of Service (QoS) to Platinum
• Set the WMM Policy to Required
• Ensure Session Timeout is enabled and configured correctly
• Ensure Broadcast Key Interval is enabled and configured correctly
• Ensure Aironet IE is Enabled
• Set DTPC Support to Enabled
• Disable P2P (Peer to Peer) Blocking Action
• Ensure Client Exclusion is configured correctly
• Disable DHCP Address Assignment Required
• Set MFP Client Protection to Optional or Disabled
• Set the DTIM Period to 2
• Set Client Load Balancing to Disabled
• Set Client Band Select to Disabled
• Set IGMP Snooping to Enabled
• Enable Symmetric Mobile Tunneling Mode if Layer 3 mobility is utilized
• Enable ClientLink if utilizing Cisco 802.11n capable Access Points
• Configure the Data Rates as necessary
• Enable CCX Location Measurement
• Configure Auto RF as necessary
• Set Admission Control Mandatory to Enabled for Voice
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