Enterprise QoS Solution Reference Network Design Guide

Catalyst 2950—QoS Considerations and Design
2-18
Example 2-1 Catalyst 2950—Trusted Endpoint Model Configuration
CAT2950(config)#interface FastEthernet0/1
CAT2950(config-if)#mls qos trust dscp
Catalyst MLS QoS Verification Command
Enterprise QoS Solution Reference Network Design Guide
Chapter 2 Campus QoS Design
The show mls qos interface verification command reports the configured trust state and the current
operating trust mode of a switchport interface.
In this example, the command verifies that interface FastEthernet 0/1 correctly trusts the DSCP values
of the endpoint to which it is connected.
Example 2-2 Show MLS QoS Interface Verification of a Switchport Connected to a Trusted Endpoint
CAT2950#show mls qos interface FastEthernet0/1
FastEthernet0/1
trust state: trust dscp ! Configured trust state is to trust DSCP
trust mode: trust dscp ! Current operating mode is to trust DSCP
COS override: dis
default COS: 0
pass-through: none
trust device: none
CAT2950#
Catalyst 2950—AutoQoS VoIP Model
The Catalyst 2950 supports AutoQoS VoIP with the following keyword options:
auto qos voip cisco-phone
auto qos voip cisco-softphone
auto qos voip trust
When you enable AutoQoS VoIP on the Catalyst 2950 by using the auto qos voip cisco-phone, the auto
qos voip cisco-softphone, or the auto qos voip trust interface configuration command, the switch
automatically generates a QoS configuration based on the traffic type and ingress packet label and
applies the commands listed in Table 2-1 to the interface.
Table 2-1 Catalyst 2950 Auto-QoS Generated Configuration
Description Automatically Generated QoS Command Equivalent
The switch automatically enables standard
QoS and configures the CoS-to-DSCP map
(maps CoS values in incoming packets to a
DSCP value).
If you entered the auto qos voip trust
command, the switch automatically sets the
ingress classification on the interface to trust
the CoS value received in the packet.
CAT2950(config)# mls qos map cos-dscp 0 8 16 26
32 46 48 56
CAT2950(config-if)# mls qos trust cos
Version 3.3