3D Connexion OL-6415-03 manual 802.11VOIP Phone Support, Mapping IP Precedence Examples

Chapter 7 Configuring QoS on an Access Point

Configuration Guidelines

In addition, a Cisco access point uses Access Control Lists for forwarding or blocking packets on selective basis, as designated by the user for the purpose of:

•Providing QoS for Voice-over-IP (VoIP) phones.

•Mapping IP precedence values into 802.1P/Q Class of Service (CoS) values for downlink traffic.

•Providing Layer 2 and Layer 3 Access Control List features to the bridging path and access point host receive path.

802.11VOIP Phone Support

The Symbol element is advertised by the access point. This helps a Symbol phone to make an association decision if there are multiple access points serving the area. The current packet rate is the calculation of average means of number of packets transmitted per second for the past 8 seconds.

After the normal 802.11 association process, a Symbol phone sends a proprietary Symbol 802.11 phone registration message (WNMP) to the access point to complete the association.

The Symbol phone does not associate to an access point if the advertised packet rate is above the threshold of the access point. The Symbol phone uses its Symbol Element as optional information. Basic operation does not require an access point to send Symbol Elements.

Mapping IP Precedence Examples

The QoS examples in this section show the mapping of IP precedence.

Matching IP Precedence

class-map match-any ip_pres_5 match ip precedence 5

policy-map priority_queue class ip_pres_5

set cos 5

interface Dot11Radio 0/2/0

ip address 30.5.0.105 255.255.0.0 service-policy output priority_queue

Matching IP DSCP

class-map match-any ip_dscp_40_47 match ip dscp ef

!

policy-map priority_queue class ip_dscp_40_47

set cos 5

!

interface Dot11Radio 0/2/0 no ip address

service-policy output priority_queue

Cisco Wireless Router and HWIC Configuration Guide

7-4 OL-6415-03