HP Cisco Catalyst Blade Switch 3020 Cisco Catalyst Blade Switch 3020 for HP So - Page 291
switchport voice vlan, mls qos trust cos
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Chapter 12 Configuring Voice VLAN Configuring Voice VLAN voice traffic a higher priority and forward all voice traffic through the native (access) VLAN. The Cisco IP Phone can also send untagged voice traffic or use its own configuration to send voice traffic in the access VLAN. In all configurations, the voice traffic carries a Layer 3 IP precedence value (the default is 5). Beginning in privileged EXEC mode, follow these steps to configure voice traffic on a port: Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Command Purpose configure terminal Enter global configuration mode. interface interface-id Specify the interface connected to the phone, and enter interface configuration mode. mls qos trust cos Configure the interface to classify incoming traffic packets by using the packet CoS value. For untagged packets, the port default CoS value is used. Note Before configuring the port trust state, you must first globally enable QoS by using the mls qos global configuration command. switchport voice vlan {vlan-id | dot1p | none | untagged} Configure how the Cisco IP Phone carries voice traffic: • vlan-id-Configure the phone to forward all voice traffic through the specified VLAN. By default, the Cisco IP Phone forwards the voice traffic with an IEEE 802.1Q priority of 5. Valid VLAN IDs are 1 to 4094. • dot1p-Configure the phone to use IEEE 802.1p priority tagging for voice traffic and to use the default native VLAN (VLAN 0) to carry all traffic. By default, the Cisco IP Phone forwards the voice traffic with an IEEE 802.1p priority of 5. • none-Allow the phone to use its own configuration to send untagged voice traffic. • untagged-Configure the phone to send untagged voice traffic. end Return to privileged EXEC mode. show interfaces interface-id switchport or Verify your voice VLAN entries. show running-config interface interface-id Verify your QoS and voice VLAN entries. copy running-config startup-config (Optional) Save your entries in the configuration file. This example shows how to configure a port connected to a Cisco IP Phone to use the CoS value to classify incoming traffic, to use IEEE 802.1p priority tagging for voice traffic, and to use the default native VLAN (VLAN 0) to carry all traffic: Switch# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Switch(config)# interface gigabitethernet0/1 Switch(config-if)# mls qos trust cos Switch(config-if)# switchport voice vlan dot1p Switch(config-if)# end To return the port to its default setting, use the no switchport voice vlan interface configuration command. OL-8915-01 Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide 12-5
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