Cisco Catalyst 3750-X Command Reference

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Catalyst 3750-X and 3560-X Switch Command Reference
OL-29704-01
Chapter 2 Catalyst 3750-X and 3560-X Switch Cisco IOS Commands
auto qos trust
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.
auto qos trust {cos | dscp}
no auto qos trust {cos | dscp}
Syntax Description
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.
cos Trust the CoS packet classification.
dscp Trust the DSCP packet classification.
Table 2-3 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
53 6 73–
CoS-to-ingress
queue map
4, 5 (queue 2) 0, 1, 2, 3, 6, 7(queue
1)
CoS-to-egress
queue map
4, 5
(queue 1)
2, 3, 6, 7 (queue 2) 0 (queue 3) 2
(queue 3)
0, 1
(queue 4)
Table 2-4 Auto-QoS Configuration for the Ingress Queues
Ingress Queue Queue Number CoS-to-Queue Map
Queue Weight
(Bandwidth)
Queue (Buffer)
Size
SRR
1
shared
1. SRR = shaped round robin. Ingress queues support shared mode only.
1 0, 1, 2, 3 ,6, 7 70 percent 90 percent
Priority 2 4, 5 30 percent 10 percent

Cisco Catalyst 3750-X Specifications

General

Switching Capacity	160 Gbps
Stacking Bandwidth	64 Gbps
Max Stacking Units	9
Layer Support	Layer 2 and Layer 3
Form Factor	Rack-mountable
DRAM	256 MB
Flash Memory	64 MB
Model	Cisco Catalyst 3750-X Series
Ports	24 or 48 10/100/1000 Ethernet ports
Uplink Interfaces	4 SFP or 2 SFP+
Features	StackWise Plus, EnergyWise
Image	IP Base or IP Services
Operating Temperature	0 to 40°C
Operating Humidity	10 to 85% noncondensing