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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 44 Configuring Quality of Service
Configuring Auto-QoS on a Standalone Supervisor Engine 6-E/6L-E or Supervisor Engine 7-E/7L-E/8-E
It establishes a trusted boundary that recognizes Cisco IP Phones and trusts the Cos setting of the packets
from the phone. If a Cisco IP Phone is not detected, the Cos field is ignored and the packets are not
classified as voice traffic. Upon detecting a Cisco phone, the ingress packets are marked based on the
Cos value in the packets. This marking is used on egress for proper traffic classification and handling.
Auto qos srnd4—Is generated when any new auto qos command is configured on an interface and
migrates from legacy CLIs to generate new configurations. This CLI only generates a global
configuration if during migration, one or more interfaces has legacy auto-QoS enabled
Auto qos video—Generates QoS configuration for untrusted interfaces. It incorporates a service-policy
to classify the traffic coming from untrusted desktops/devices and marks them accordingly.
Auto qos void cisco-softphone—Generate QoS configuration for interfaces connected to PCs running
the Cisco IP SoftPhone application and marks as police traffic stemming from such interfaces. Ports
configured with this CLI are considered untrusted.
Auto qos classify—Generates QoS configuration for untrusted interfaces. It applies a service-policy to
classify the traffic stemming from untrusted desktops or devices and marks them accordingly. The
service-policies generated do not police.
Auto-QoS Compact
When you enter an auto-QoS command, the switch goes on to display all the generated commands as if
the commands were entered from the CLI. Enable auto-QoS compact if you want to hide auto-QoS
generated commands from the running configuration.
To enable auto-QoS compact, enter this command:
To disable auto-QoS compact, first remove all the auto-QoS configuration by entering the no form of the
corresponding auto-QoS interface configuration command and then enter the no auto qos global
compact global configuration command. Disabling auto-QoS compact is a required task when have to
perform an ISSU from an image where auto-QoS compact is supported to an image where this feature is
not available.
Command Purpose
Switch# configure terminal
Enters global configuration mode.
Switch(config)# auto qos global
compact
Enables auto-QoS compact and generates global auto-QoS
configurations that are hidden from the running configuration.
You can then enter the auto-QoS command you want to
configure, in the interface configuration mode. The interface
commands that the system generates are also hidden from
running configuration.
To display the auto-QoS configuration that has been applied, use
these the privileged EXEC commands: show derived-config,
show policy-map, show policy-map interface, show
class-map, show table-map, and show auto-qos, show ip
access-list.
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