Cisco Catalyst 3550 Command Reference Manual page 42
Multilayer switch
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Also See for Catalyst 3550:
- Command reference manual (794 pages) ,
- Installation manual (154 pages) ,
- Hardware installation manual (106 pages)
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Chapter 2
Cisco IOS Commands
auto qos voip
To disable auto-QoS on the switch, use the no mls qos global configuration command. When you enter
this command, the switch disables QoS on all interfaces and enables pass-through mode.
Examples
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 Gigabit Ethernet interface 0/1 is a trusted device:
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# auto qos voip trust
This example shows how to enable auto-QoS and to trust the QoS labels received in incoming packets
when the device connected to Fast Ethernet interface 0/1 is detected as a Cisco IP phone:
Switch(config)# interface fastethernet0/1
Switch(config-if)# auto qos voip cisco-phone
This example shows how to display the QoS configuration that is automatically generated when
auto-QoS is enabled:
Switch# debug autoqos
AutoQoS debugging is on
Switch# configure terminal
Enter configuration commands, one per line.
End with CNTL/Z.
Switch(config)# interface fastethernet0/1
Switch(config-if)# auto qos voip trust
Switch(config-if)#
4d22h:mls qos map cos-dscp 0 8 16 26 32 46 48 56
4d22h:mls qos min-reserve 5 170
4d22h:mls qos min-reserve 6 10
4d22h:mls qos min-reserve 7 65
4d22h:mls qos min-reserve 8 26
4d22h:mls qos
4d22h:interface FastEthernet0/1
4d22h: mls qos trust cos
4d22h: wrr-queue bandwidth 20 1 80 0
4d22h: wrr-queue min-reserve 1 5
4d22h: wrr-queue min-reserve 2 6
4d22h: wrr-queue min-reserve 3 7
4d22h: wrr-queue min-reserve 4 8
4d22h: no wrr-queue cos-map
4d22h: wrr-queue cos-map 1 0 1 2 4
4d22h: wrr-queue cos-map 3 3 6 7
4d22h: wrr-queue cos-map 4 5
4d22h: priority-queue out
Switchconfig-if)# interface gigabitethernet0/1
Switch(config-if)# auto qos voip cisco-phone
Switch(config-if)#
4d22h:interface GigabitEthernet0/1
4d22h: mls qos trust device cisco-phone
4d22h: mls qos trust cos
4d22h: wrr-queue bandwidth 20 1 80 0
4d22h: wrr-queue queue-limit 80 1 20 1
4d22h: no wrr-queue cos-map
4d22h: wrr-queue cos-map 1 0 1 2 4
4d22h: wrr-queue cos-map 3 3 6 7
4d22h: wrr-queue cos-map 4 5
4d22h: priority-queue out
Switch(config-if)#
You can verify your settings by entering the show auto qos interface interface-id privileged EXEC
command.
Catalyst 3550 Multilayer Switch Command Reference
2-16
78-11195-09
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