•
Bandwidth requirements and speed of the network.
•
Location of congestion points in the network.
Restrictions for Auto-QoS
The following are restrictions for automatic QoS (auto-QoS):
•
Auto-QoS (and enhanced auto-QoS) is not supported on switches running the LAN Lite image.
Information about Configuring Auto-QoS
Auto-QoS Overview
You can use the auto-QoS feature to simplify the deployment of QoS features. Auto-QoS determines the
network design and enables QoS configurations so that the switch can prioritize different traffic flows. It uses
the egress queues instead of using the default (disabled) QoS behavior. The switch offers best-effort service
to each packet, regardless of the packet contents or size, and sends it from a single queue.
When you enable auto-QoS, it automatically classifies traffic based on the traffic type and ingress packet
label. The switch uses the classification results to choose the appropriate egress queue.
You can use auto-QoS commands to identify ports connected to the following Cisco devices:
•
Cisco IP Phones
•
Devices running the Cisco SoftPhone application
•
Cisco TelePresence
•
Cisco IP Camera
•
Cisco digital media player
You also use the auto-QoS commands to identify ports that receive trusted traffic through an uplink. Auto-QoS
then performs these functions:
•
Detects the presence or absence of auto-QoS devices through conditional trusted interfaces.
•
Configures QoS classification
•
Configures egress queues
Related Topics
QoS Overview
Auto-QoS Compact Overview
When you enter an auto-QoS command, the switch displays all the generated commands as if the commands
were entered from the CLI. You can use the auto-QoS compact feature to hide the auto-QoS generated
commands from the running configuration. This would make it easier to comprehend the running-configuration
and also help to increase efficient usage of memory.
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
646
Restrictions for Auto-QoS
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