Cisco Wireless IP Phone 8821 and 8821-EX Wireless LAN Deployment Guide
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Wired QoS
Configure QoS settings and policies for the necessary network devices.
Configuring Cisco Switch Ports for WLAN Devices
Configure the Cisco Wireless LAN Controller and Cisco Access Point switch ports as well as any uplink switch ports.
If utilizing Cisco IOS Switches, use the following switch port configurations.
Enable COS trust for Cisco Wireless LAN Controller
mls qos
!
interface X
mls qos trust cos
Enable DSCP trust for Cisco Access Points
mls qos
!
interface X
mls qos trust dscp
If utilizing Cisco Meraki MS Switches, reference the Cisco Meraki MS Switch VoIP Deployment Guide.
https://meraki.cisco.com/lib/pdf/meraki_whitepaper_msvoip.pdf
Note:
When using the Cisco Wireless LAN Controller, DSCP trust must be implemented or must trust the UDP data ports used
by the Cisco Wireless LAN Controller (CAPWAP = UDP 5246 and 5247) on all interfaces where wireless packets will traverse
to ensure QoS markings are correctly set.
Configuring Cisco Switch Ports for Wired IP Phones
Enable the Cisco wired IP phone switch ports for Cisco phone trust.
Below is a sample switch configuration:
mls qos
!
Interface X
mls qos trust device cisco-phone
mls qos trust dscp
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