Cisco WS C4224V 8FXS - 200Mbps Ethernet Switch Software Configuration Manual page 150

Configure IP Networks for Real-Time Voice Traffic
weighted fair queuing), and IP precedence. To configure your IP network for
real-time voice traffic, you need to consider the entire scope of your network and
then select the appropriate QoS tool or tools.
To improve voice network performance, QoS must be configured throughout your
network, not just on your Catalyst 4224 running VoIP. Not all QoS techniques are
appropriate for all network routers. Edge routers and backbone routers in your
network do not necessarily perform the same operations, and the QoS tasks they
perform might differ as well. To configure your IP network for real-time voice
traffic, you need to consider the functions of both edge and backbone routers in
your network and then select the appropriate QoS tool or tools.
In general, edge routers perform the following QoS functions:
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In general, backbone routers perform the following QoS functions:
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Scalable QoS solutions require cooperative edge and backbone functions.
Although not mandatory, some QoS tools can be valuable in fine-tuning your
network to support real-time voice traffic. To configure your IP network for QoS,
perform one or more of the following tasks:
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Each of these tasks is discussed in the following sections.
Catalyst 4224 Access Gateway Switch Software Configuration Guide
6-4
Packet classification
Admission control
Bandwidth management
Queuing
High-speed switching and transport
Congestion management
Queue management
Configure RSVP for Voice, page 6-5
Configure Multilink Point-to-Point Protocol with Interleaving, page 6-7
Configure Real-Time Transport Protocol Header Compression, page 6-9
Configure Custom Queuing, page 6-11
Configure Weighted Fair Queuing, page 6-12
Chapter 6 Configuring VoIP
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