HP Cisco Catalyst Blade Switch 3020 Cisco Catalyst Blade Switch 3020 for HP So - Page 544
Enabling Auto-QoS for VoIP, no mls qos
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Configuring Auto-QoS Chapter 27 Configuring QoS Enabling Auto-QoS for VoIP Beginning in privileged EXEC mode, follow these steps to enable auto-QoS for VoIP within a QoS domain: Step 1 Step 2 Command configure terminal interface interface-id Step 3 auto qos voip {cisco-phone | cisco-softphone | trust} Step 4 end Step 5 show auto qos interface interface-id Purpose Enter global configuration mode. Specify the port that is connected to a Cisco IP Phone, the port that is connected to a device running the Cisco SoftPhone feature, or the uplink port that is connected to another trusted switch or router in the interior of the network, and enter interface configuration mode. Enable auto-QoS. The keywords have these meanings: • cisco-phone-If the port is connected to a Cisco IP Phone, the QoS labels of incoming packets are trusted only when the telephone is detected. • cisco-softphone-The port is connected to device running the Cisco SoftPhone feature. • trust-The uplink port is connected to a trusted switch or router, and the VoIP traffic classification in the ingress packet is trusted. Return to privileged EXEC mode. Verify your entries. This command displays the auto-QoS command on the interface on which auto-QoS was enabled. You can use the show running-config privileged EXEC command to display the auto-QoS configuration and the user modifications. To display the QoS commands that are automatically generated when auto-QoS is enabled or disabled, enter the debug auto qos privileged EXEC command before enabling auto-QoS. For more information, see the debug autoqos command in the command reference for this release. To disable auto-QoS on a port, use the no auto qos voip interface configuration command. Only the auto-QoS-generated interface configuration commands for this port are removed. If this is the last port on which auto-QoS is enabled and you enter the no auto qos voip command, auto-QoS is considered disabled even though the auto-QoS-generated global configuration commands remain (to avoid disrupting traffic on other ports affected by the global configuration). You can use the no mls qos global configuration command to disable the auto-QoS-generated global configuration commands. With QoS disabled, there is no concept of trusted or untrusted ports because the packets are not modified (the CoS, DSCP, and IP precedence values in the packet are not changed). Traffic is switched in pass-through mode (packets are switched without any rewrites and classified as best effort without any policing). This example shows how to enable auto-QoS and to trust the QoS labels received in incoming packets when the switch or router connected to a port is a trusted device: Switch(config)# interface gigabitethernet0/1 Switch(config-if)# auto qos voip trust 27-26 Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide OL-8915-01
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