Cisco Catalyst 3750-X User Manual

39-33
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 39 Configuring QoS
Displaying Auto-QoS Information
Displaying Auto-QoS Information
To display the initial auto-QoS configuration, use the show auto qos [interface [interface-id]]
privileged EXEC command. To display any user changes to that configuration, use the show
running-config privileged EXEC command. You can compare the show auto qos and the show
running-config command output to identify the user-defined QoS settings.
To display information about the QoS configuration that might be affected by auto-QoS, use one of these
command
s:
• show mls qos
• show mls qos maps cos-dscp
• show mls qos interface [interface-id] [buffers | queueing]
• show mls qos maps [cos-dscp | cos-input-q | cos-output-q | dscp-cos | dscp-input-q |
dscp-output-q]
• show mls qos input-queue
• show running-config
For more information about these commands, see the command refere
nce for this release.
Configuring Standard QoS
Before configuring standard QoS, you must have a thorough understanding of these items:
• The types of applications used and the traffic patterns on your network.
• Traffic characteristics and needs of your network. Is the traffic bursty? Do you need to reserve
bandwidth for voice and video streams?
• Bandwidth requirements and speed of the network.
• Location of congestion points in the network.
These sections contain this co
nfiguration information:
• Default Standard QoS Configuration, page 39-34
• Standard QoS Configuration Guidelines, page 39-36
• Enabling QoS Globally, page 39-38 (required)
• Enabling VLAN-Based QoS on Physical Ports, page 39-39 (optional)
• Configuring Classification Using Port Trust States, page 39-40 (required
• Configuring a QoS Policy, page 39-46 (required)
• Configuring DSCP Maps, page 39-69 (optional, unless you need to use the
DSCP-to-DSCP-mutation map or the policed-DSCP map)
• Configuring Ingress Queue Characteristics, page 39-75 (optional)
• Configuring Egress Queue Characteristics, page 39-79 (optional)

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