Quality Of Service (Qos); Configuring Qos In Cisco Unified Communications Manager; Configuring Qos Policies For The Network - Cisco 7925G Deployment Manual

Quality of Service (QoS)

Quality of Service enables queuing to ensure high priority for voice traffic. To implement appropriate queuing for voice traffic,
use the following suggestions:
•
Ensure that WMM is enabled on the access point.
•
Create a QoS policy on the access point giving priority to voice (RTP) traffic and apply that profile to the desired
interfaces.
RTP (DSCP = EF) to COS = 6
SCCP (DSCP = CS3) to COS = 4
•
Be sure that RTP packets have the proper QoS markings and other protocols are not using the same QoS markings.
•
Select the "Platinum" QoS profile for the voice wireless LAN when using Cisco Unified Wireless LAN Controller
technology and set the 802.1p tag to "6".
•
Enable Differentiated Services Code Point (DSCP) preservation on the Cisco IOS switch and/or use a QoS policy to set
DSCP to EF for RTP traffic (UDP port range 16384-32767) on the Cisco IOS router.
For more information about TCP and UDP ports used by the Cisco Unified Wireless IP Phone 7925G and the Cisco Unified
Communications Manager, refer to the Cisco Unified Communications Manager TCP and UDP Port Usage document at this
URL:
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/port/7_1_2/CCM_7.1.2PortList.pdf

Configuring QoS in Cisco Unified Communications Manager

The SCCP DSCP values are configured in the Cisco Unified Communications Manager enterprise parameters. Cisco Unified
Communications Manager uses the default value of CS3 to have devices set the DSCP marking for SCCP packets as shown in
the Enterprise Parameters Configuration page.

Configuring QoS Policies for the Network

Set up QoS policies and settings for the following network devices.
Cisco Unified Wireless IP Phone 7925G Deployment Guide 20