Auto Qos Voip - Cisco Catalyst 2960 Command Reference Manual
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Also See for Catalyst 2960:
- Configuration manual (2288 pages) ,
- Software configuration manual (980 pages) ,
- Command reference manual (800 pages)
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Chapter 2
Catalyst 2960 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 and egress queues as shown in
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
78-16882-01
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 incoming packets are trusted only when the telephone
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 incoming packets are trusted. For
nonrouted ports, the CoS value of the incoming packet is trusted.
VoIP Control
Routing Protocol
Traffic
Traffic
24, 26
48
3
6
3, 6, 7 (queue 2)
Table
2-1.
1
2
STP
BPDU
Real-Time
Traffic
Video Traffic
56
34
7
3
4 (queue 3)
Catalyst 2960 Switch Command Reference
auto qos voip
All Other Traffic
–
–
0, 1 (queue 1)
2
0, 1
(queue 3)
(queue 4)
2-13
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