Nortel Web OS 10.0, Application Manual

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Web OS 10.0 Application Guide
Chapter 17: Bandwidth Management
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212777-A, February 2002
Frame Discard
When packets in a contract queue have not yet been sent and the buffer size set for the queue is
full, any new frames attempting to be placed in the queue will be discarded.
URL-Based Bandwidth Management
URL-based BWM allows the network administrator or Web site manager to control bandwidth
based on URLs, HTTP headers, or cookies.
All three types of BWM are accomplished by following the configuration guidelines on con-
tent switching described in
Chapter 15, “Content Intelligent Switching . ” You would also need
to assign a contract to each defined string, where the string is contained in a URL, an HTTP
header, or a cookie.
BWM based on URLs gives Web site managers the following capabilities:
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Ability to allocate bandwidth based on the type of request
The switch allocates bandwidth based on certain strings in the incoming URL request. For
example, as shown in
Figure 17-4 , if a Web site has 10Mbs of bandwidth, the site manager
can allocate 1 Mbs of bandwidth for static HTML content, 3Mbs of bandwidth for graphic
content and 4Mbs of bandwidth for dynamic transactions, such as URLs with
cgi-bin
requests and .asp requests.
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Ability to prioritize transactions or applications
By allocating bandwidth, the Web switch can guarantee that certain applications and trans-
actions get better response time.
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Ability to allocate a certain amount of bandwidth for requests that can be cached
As shown in Figure 17-5 on page 450 , users will be able to allocate a certain percentage of
bandwidth for Web cache requests by using the URL parsing and bandwidth management
feature.