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Catalyst 3750 Metro Switch Command Reference
OL-9645-10
Chapter 2 Catalyst 3750 Metro Switch Cisco IOS Commands
auto qos voip
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.
auto qos voip
{
cisco-phone
|
cisco-softphone
|
trust
}
no auto qos voip
[
cisco-phone
|
cisco-softphone
|
trust
]
Syntax Description
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.
shows the default settings.
shows the generated auto-QoS configuration for the ingress queues.
cisco-phone
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.
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 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.
Table 2-1
Traffic Types, Packet Labels, and Queues
VoIP Data
Traffic
VoIP Control
Traffic
Routing Protocol
Traffic
STP
1
BPDU
2
Traffic
1.
STP = Spanning Tree Protocol
2.
BPDU = bridge protocol data unit
Real-Time
Video Traffic
All Other Traffic
DSCP
3
3.
DSCP = Differentiated Services Code Point
46
24, 26
48
56
34
–
CoS
4
4.
CoS = class of service
5
3
6
7
3
–
CoS-to-Ingress
Queue Map
2, 3, 4, 5, 6, 7 (queue 2)
0, 1 (queue 1)
CoS-to-Egress
Queue Map
5 (queue 1)
3, 6, 7 (queue 2)
4 (queue 3)
2
(queue 3)
0, 1
(queue 4)
