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Note ● For complete syntax and usage information for the commands used in this chapter, see these publications:
http://www.cisco.com/en/US/products/ps11846/prod_command_reference_list.html
http://www.cisco.com/en/US/products/hw/switches/ps708/tsd_products_support_series_home.html
Participate in the Technical Documentation Ideas forum
– VLAN interfaces (also known as switch virtual interfaces or SVIs)
Note AutoQoS is a macro that applies the recommended Architecture for Voice, Video, and Integrated Data (AVVID) QoS settings to a port.
Cisco IP phones are usually connected directly to ports. Optionally, you can attach a PC to the phone and use the phone as a hop to the switch.
The traffic that comes from the phone can be marked with an 802.1Q or 802.1p tag. The tag contains a VLAN ID and CoS value. When you configure the port to trust the CoS value that comes from the phone, the switch uses the CoS value to prioritize the phone traffic.
There is a three-port switch built into Cisco IP phones that forwards the traffic that comes from the PC, the phone, and the switch port. Cisco IP phones have trust and classification capabilities that you need to configure (see the “How to Configure Cisco IP Phone Support” section).
AutoQoS supports Cisco IP phones with the auto qos voip cisco-phone interface configuration command. When you enter the auto qos voip cisco-phone interface configuration command on a port that is configured to support an IP phone and to which an IP phone is connected, the autoQoS feature does the following:
The Cisco IP Communicator program runs on a PC and emulates a Cisco IP phone. The Cisco IP Communicator marks its voice traffic with a DSCP value instead of a CoS value. When you configure the port to trust the DSCP value that comes from the Cisco IP Communicator, the switch uses the DSCP value to prioritize the Cisco IP Communicator traffic.
AutoQoS supports the Cisco IP Communicator program with the auto qos voip cisco-softphone interface configuration command. When you enter the auto qos voip cisco-softphone interface configuration command on a port that is connected to a device running the Cisco IP Communicator program, the autoQoS feature does the following:
Ports that connect to the interior of your network might receive traffic that has already been marked with QoS labels that are consistent with your network QoS policies, and which do not need to be changed. You can use the QoS trust feature to process the marked traffic using the received QoS values.
AutoQoS supports marked traffic with the auto qos voip trust interface configuration command. When you enter the auto qos voip trust interface configuration command, the autoQoS feature does the following:
Note AutoQoS generates commands that are appropriate for the QoS port architecture of the port on which you enter an auto qos voip command. For each of the different auto qos voip commands, autoQoS generates different QoS commands for each of these QoS port architectures:
The procedures in the following sections include the commands that you need to enter to display the generated commands, but the specific commands that autoQoS generates are not listed in this document.
Note Complete the configuration procedures in the “How to Configure Cisco IP Phone Support” section before you configure autoQoS for a Cisco IP phone.
To configure autoQoS for a Cisco IP phone, perform this task:
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When configuring autoQoS for a Cisco IP phone, note the following information:
Note The no auto qos voip interface configuration command does not delete the received CoS to internal DSCP map created by autoQoS.
This example shows how to enable autoQoS on Gigabit Ethernet interface 1/1:
Displays the generated received CoS to internal DSCP map.
To configure autoQoS for Cisco IP Communicator, perform this task:
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Note The no auto qos voip interface configuration command does not delete the policy, class, and DSCP markdown maps created by autoQoS.
This example shows how to enable autoQoS on Gigabit Ethernet interface 1/1:
Displays the configured autoQoS commands.
Displays the policy map and policers created by autoQoS.
Displays the class maps created by autoQoS.
Router# show class-map AUTOQOS-CISCO-SOFTPHONE-SIGNAL
Displays the DSCP markdown maps created by autoQoS.
To configure autoQoS for marked traffic, perform this task:
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When configuring autoQoS to trust marked traffic, note the following information:
Note The no auto qos voip interface configuration command does not delete the received CoS to internal DSCP map created by autoQoS.
This example shows how to enable autoQoS on Gigabit Ethernet interface 1/1:
Displays the configured autoQoS commands.
For ports configured with the switchport command, displays the generated received CoS to internal DSCP map.
http://www.cisco.com/en/US/products/hw/switches/ps708/tsd_products_support_series_home.html
Participate in the Technical Documentation Ideas forum