C H A P T E R
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Cisco AVVID Network Infrastructure Enterprise Quality of Service Design
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QoS in an AVVID-Enabled Wide-Area Network
This chapter provides information about implementing QoS in an AVVID-enabled wide-area network
(WAN). It includes the following:
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Note
This chapter contains references to other documents. These references are included as tips in the text.
The URL for each referenced document is located in
cases, an internal document is referenced. For copies of internal documents, please see your Cisco
Systems representative.
Overview
A fundamental principle of economics states that the more scarce a resource, the more efficiently it
should be managed. In an enterprise network infrastructure, bandwidth is the prime resource and it is
scarcest over the WAN. Therefore, the case for efficient bandwidth optimization via QoS technologies
is strongest over the WAN, especially for enterprises that are converging their voice, video, and data
networks.
This chapter provides design guidance for enabling QoS over the WAN. It is important to note that the
recommendations put forward in this chapter are not autonomous. They are critically dependent on the
recommendations discussed in
This chapter focuses strictly on the WAN components of the Cisco AVVID Network Infrastructure (as
shown in
), specifically the:
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WAN aggregation routers
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Remote-branch routers
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WAN media
For general information about using QoS for voice and video, see