Cisco Catalyst 3750-E Series, Руководство по настройке программного обеспечения

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Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-08
Chapter 37 Configuring QoS
Configuring Auto-QoS
•
When enabling auto-QoS with a Cisco IP Phone on a routed port, you must assign a static IP address
to the IP phone.
• This release supports only Cisco IP SoftPhone Version 1.3(3) or later.
•
Connected devices must use Cisco Call Manager Version 4 or later.
• Beginning with Cisco IOS Release 12.2(40)SE, auto-Qos VoIP uses the priority-queue interface
configuration command for an egress interface. You can also configure a policy-map and trust device
on the same interface for Cisco IP phones.
•
If the switch port was configured by using the auto qos voip cisco-phone interface configuration
command in Cisco IOS Release 12.2(37)SE or earlier, the auto-QoS generated commands new to
Cisco IOS Release 12.2(40)SE are not applied to the port. To have these commands automatically
applied, you must remove and then reapply the configuration to the port.
Auto-QoS Enhanced Considerations
• The auto qos srnd4 global configuration command is generated as a result of enhanced auto-QoS
configuration.
•
If the legacy auto qos voip commands are executed on the switch and the mls qos command is
disabled, the enhanced auto-QoS configuration is generated. Otherwise, legacy auto-QoS commands
are executed.
Enabling Auto-QoS
For optimum QoS performance, enable auto-QoS on all the devices in your network.
Beginning in privileged EXEC mode, follow these steps to enable auto-QoS devices within a QoS
domain:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2 interface interface-id Specify the port that is connected to a video device or the uplink port
that is connected to another trusted switch or router in the network
interior, and enter interface configuration mode.
Step 3 auto qos voip { cisco-phone |
cisco-softphone | trust }
or
Enable auto-QoS.
• 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.
auto qos video { cts | ip-camera }
or
Enable auto-QoS for a video device.
• cts — A port connected to a Cisco Telepresence system.
•
ip-camera —A port connected to an IP camera.
QoS labels of incoming packets are trusted only when the system is
detected.