Configuring Switch Ports For Wired Ip Phones - Cisco 7925G Series Deployment Manual

Note: When using the Cisco Unified Wireless LAN Controller, DSCP trust must be implemented or trust the UDP data ports
used by the Cisco Unified Wireless LAN Controller (LWAPP = 12222 and 12223; CAPWAP = 5246 and 5247) on all
interfaces where wireless packets will traverse to ensure QoS markings are correctly set. Versions prior to 5.2 use LWAPP,
where versions 5.2 and later use CAPWAP.

Configuring Switch Ports for Wired IP Phones

Enable the Cisco wired IP phone switch ports for Cisco phone trust
mls qos
!
Interface X
mls qos trust device cisco-phone
mls qos trust dscp
If DSCP markings are not preserved, then the below configuration can be used to set the DSCP based on the TCP or UDP port
to map RTP and SCCP correctly.
Ensure the following QoS policy is not applied to an interface where wireless traffic traverses.
If using non-secure SCCP, then TCP port 2000 is used. TCP port 2443 is used for secure SCCP.
ip access-list extended SCCP
permit tcp any eq 2000 any
permit tcp any any eq 2000
permit tcp any eq 2443 any
permit tcp any any eq 2443
!
ip access-list extended RTP
permit udp any range 16384 32767 any
permit udp any any range 16384 32767
!
class-map match-all SCCP
match access-group name SCCP
class-map match-all RTP
match access-group name RTP
!
policy-map Voice
class RTP
set dscp ef
!
class SCCP
set dscp cs3
!
interface X
service-policy input Voice
service-policy output Voice
Cisco Unified Wireless IP Phone 7925G Series Deployment Guide 26