Auto Qos Voip - Cisco Catalyst 3750 Metro Command Reference Manual

Chapter 2 Catalyst 3750 Metro Switch Cisco IOS Commands

auto qos voip

Use the auto qos voip interface configuration command to automatically configure quality of service
(QoS) for voice over IP (VoIP) within a QoS domain. Use the no form of this command to return to the
default setting.
Syntax Description
cisco-phone
cisco-softphone Identify this port as connected to a device running the Cisco SoftPhone, and
trust
Defaults Auto-QoS is disabled on the port.
When auto-QoS is enabled, it uses the ingress packet label to categorize traffic, to assign packet labels,
and to configure the ingress queues and egress queue-sets.
Table 2-1 Traffic Types, Packet Labels, and Queues
VoIP Data
Traffic
3
DSCP 46
4
CoS 5
CoS-to-Ingress 2, 3, 4, 5, 6, 7 (queue 2)
Queue Map
CoS-to-Egress 5 (queue 1)
Queue Map
1. STP = Spanning Tree Protocol
2. BPDU = bridge protocol data unit
3. DSCP = Differentiated Services Code Point
4. CoS = class of service
Table 2-2
OL-9645-10
auto qos voip {cisco-phone | cisco-softphone | trust}
no auto qos voip [cisco-phone | cisco-softphone | trust]
Identify this port as connected to a Cisco IP phone, and automatically configure QoS
for VoIP. The QoS labels of inbound packets are trusted only when the phone is
detected.
automatically configure QoS for VoIP.
Identify this port as connected to a trusted switch or router, and automatically
configure QoS for VoIP. The QoS labels of inbound packets are trusted. For
nonrouted ports, the class of service (CoS) value of the inbound packet is trusted.
For routed ports, the Differentiated Services Code Point (DSCP) value is trusted.
VoIP Control Routing Protocol
Traffic Traffic
24, 26 48
3 6
3, 6, 7 (queue 2)
shows the generated auto-QoS configuration for the ingress queues.
Table 2-1 shows the default settings.
1 2
STP BPDU Real-Time
Traffic Video Traffic
56 34
7 3
4 (queue 3)
Catalyst 3750 Metro Switch Command Reference
auto qos voip
All Other Traffic
–
–
0, 1 (queue 1)
2 0, 1
(queue 3) (queue 4)
2-15