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

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

auto qos trust

Syntax Description
Defaults
Table 2-3
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 trust interface configuration command on the switch stack or on a standalone switch
to automatically configure quality of service (QoS) for trusted interfaces within a QoS domain. Use the
no form of this command to return to the default setting.
auto qos trust {cos | dscp}
no auto qos trust {cos | dscp}
cos Trust the CoS packet classification.
dscp Trust the DSCP packet classification.
Auto-QoS trust 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)
Table 2-4 Auto-QoS Configuration for the Ingress Queues
Ingress Queue Queue Number
1
SRR shared 1
Priority 2
1. SRR = shaped round robin. Ingress queues support shared mode only.
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1
Routing Protocol STP BPDU
Traffic Traffic
48 56
6 7
CoS-to-Queue Map
0, 1, 2, 3 ,6, 7
4, 5
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)
Queue Weight Queue (Buffer)
(Bandwidth) Size
70 percent 90 percent
30 percent 10 percent
auto qos trust
0, 1
(queue 4)
2-55