Cisco Catalyst 4500 Series Configuration Manual page 911

Chapter 40 Configuring Quality of Service
Note
There are 7 policy maps that must be defined (5 Input, 2 output)
•
AutoQos-4.0-Input-Policy
•
AutoQos-VoIP-Input-Cos-Policy
•
AutoQos-VoIP-Input-Dscp-Policy
•
AutoQos-4.0-Cisco-Phone-Input-Policy
•
AutoQos-4.0-Output-Policy
•
AutoQos-4.0-Cisco-Softphone-Input-Policy
•
• AutoQos-VoIP-Output-Policy
On all ports. The problem with COS is that packets on the native VLAN is marked as zero.
The class maps used for input matching are as follows:
! for control traffic between the phone and the callmanager
! and phone to phone [Bearer] DSCP matching
! Note: Control traffic can be either AF31 or CS3. So, we match to both values and assign
them to different qos-groups when matching DSCP and only a single group when matching COS.
class-map match-all AutoQos-VoIP-Control-Dscp26
match
class-map match-all AutoQos-VoIP-Control-Dscp24
match
class-map match-all AutoQos-VoIP-Bearer-Dscp
match
! for control traffic and phone to phone [Bearer] COS matching
! Note: Both CS3 and AF31 control traffic maps to COS 3
class-map match-all AutoQos-VoIP-Control-Cos
match cos
class-map match-all AutoQos-VoIP-Bearer-Cos
match cos
! for control traffic between the softphonephone and the callmanager
! and softphone
Class Map match-all AutoQos-4.0-Multimedia-Conf-Classify (id 36)
Match access-group name AutoQos-4.0-ACL-Multimedia-Conf
Class Map match-all AutoQos-4.0-Signaling-Classify (id 2)
Match access-group name AutoQos-4.0-ACL-Signaling
Class Map match-all AutoQos-4.0-Transaction-Classify (id 18)
Match access-group name AutoQos-4.0-ACL-Transactional-Data
Class Map match-all AutoQos-4.0-Bulk-Data-Classify (id 29)
Match access-group name AutoQos-4.0-ACL-Bulk-Data
Class Map match-all AutoQos-4.0-Scavenger-Classify (id 1)
Match access-group name AutoQos-4.0-ACL-Scavenger
! for untrueted interfaces
class-map match-all AutoQos-4.0-Multimedia-Conf-Classify
class-map match-all AutoQos-4.0-Signaling-Classify
class-map match-all AutoQos-4.0-Transaction-Classify
class-map match-all AutoQos-4.0-Bulk-Data-Classify
OL-25340-01
QoS is a two way street. So, it might work in one direction and not in the other.
dscp af31
dscp cs3
dscp ef
3
5
to softphonephone [Bearer] DSCP matching
match access-group name AutoQos-4.0-ACL-Multimedia-Conf
match access-group name AutoQos-4.0-ACL-Signaling
match access-group name AutoQos-4.0-ACL-Transactional-Data
match access-group name AutoQos-4.0-ACL-Bulk-Data
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
Configuring Auto-QoS
40-47