Auto Qos Trust - Cisco Catalyst 3560X-24P Command Reference Manual

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

auto qos trust

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.
Syntax Description
cos
dscp
Defaults 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.
Table 2-3 Traffic Types, Packet Labels, and Queues
VOIP Data
Traffic
3
DSCP 46
4
CoS 5
CoS-to-ingress 4, 5 (queue 2)
queue map
CoS-to-egress 4, 5
queue map (queue 1)
1. STP = Spanning Tree Protocol
2. BPDU = bridge protocol data unit
3. DSCP = Differentiated Services Code Point
4. CoS = class of service
Table 2-4
Ingress Queue
SRR
Priority
1. SRR = shaped round robin. Ingress queues support shared mode only.
OL-21522-02
auto qos trust {cos | dscp}
no auto qos trust {cos | dscp}
Trust the CoS packet classification.
Trust the DSCP packet classification.
VOIP Control Routing Protocol
Traffic Traffic
24, 26 48
3 6
2, 3, 6, 7 (queue 2)
Auto-QoS Configuration for the Ingress Queues
Queue Number
1
shared 1
2
1 2
STP BPDU Real-Time
Traffic Video Traffic
56 34
7 3
0 (queue 3)
Queue Weight
CoS-to-Queue Map (Bandwidth)
0, 1, 2, 3 ,6, 7 70 percent
4, 5 30 percent
Catalyst 3750-X and 3560-X Switch Command Reference
auto qos trust
All Other Traffic
–
–
0, 1, 2, 3, 6, 7(queue
1)
2 0, 1
(queue 3) (queue 4)
Queue (Buffer)
Size
90 percent
10 percent
2-55