Auto Qos Voip - Cisco Catalyst 3560-X Command Reference Manual

Chapter 2 Catalyst 3750-X and 3560-X Switch Cisco IOS Commands

auto qos voip

Syntax Description
Defaults
Table 2-9
3
DSCP
4
CoS
CoS-to-ingress
queue map
CoS-to-egress
queue map
1. STP = Spanning Tree Protocol
2. BPDU = bridge protocol data unit
3. DSCP = Differentiated Services Code Point
4. CoS = class of service
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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.
auto qos voip {cisco-phone | cisco-softphone | trust}
no auto qos voip [cisco-phone | cisco-softphone | trust]
cisco-phone Identify this port as connected to a Cisco IP Phone, and automatically configure QoS
for VoIP. The QoS labels of incoming packets are trusted only when the telephone
is detected.
cisco-softphone Identify this port as connected to a device running the Cisco SoftPhone, and
automatically configure QoS for VoIP.
trust Identify this port as connected to a trusted switch or router, and automatically
configure QoS for VoIP. The QoS labels of incoming packets are trusted. For
nonrouted ports, the CoS value of the incoming packet is trusted. For routed ports,
the DSCP value of the incoming packet is trusted.
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 and egress queues.
Traffic Types, Packet Labels, and Queues
VOIP Data VOIP Control
Traffic Traffic
46 24, 26
5 3
4, 5 (queue 2)
4, 5 2, 3, 6, 7 (queue 2)
(queue 1)
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1
Routing Protocol STP BPDU
Traffic Traffic
48 56
6 7
Catalyst 3750-X and 3560-X Switch Command Reference
2
Real-Time
Video Traffic All Other Traffic
34 –
3 –
0, 1, 2, 3, 6, 7(queue
1)
0 (queue 3) 2
(queue 3)
auto qos voip
0, 1
(queue 4)
2-61