Specifications

Cisco Unified Wireless IP Phone 7921G Series Deployment Guide 24
service-policy output Voice
Configuring Cisco Switch Ports
Configure the Cisco access point switch ports and uplink switch ports for DSCP trust.
mls qos
!
interface X
mls qos trust dscp
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