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September 2007 - Posts

WiFi WMM Requirements for Vista Miniport Drivers

Posted Tuesday, September 18, 2007 8:00 AM by wndpteam
A number of partners who author wireless drivers for Vista have asked how they can ensure their WiFi Wireless Multimedia (WMM) implementation is correct, so I thought I'd be explicit about this very important topic. To begin, read the 4-part series WiFi Read More...
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Detecting 802.1p Priority Tags: Part 3

Posted Friday, September 14, 2007 3:39 PM by wndpteam
Parts 1 and 2 of this series discussed how to determine whether an 802.1p tag was added to traffic, and how to modify the NDIS light-weight-filter (LWF) sample driver source code to accomplish this task. We do know that you're all very busy and not everyone Read More...
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Detecting 802.1p Priority Tags: Part 2

Posted Thursday, September 13, 2007 4:43 PM by wndpteam
In Gabe’s last post on detecting 802.1p priority tags, he described at a relatively high-level why it is difficult to detect a priority tag using packet tracing applications, as well as the proper way to determine whether a tag was present in a packet Read More...
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Detecting 802.1p Priority Tags

Posted Friday, September 07, 2007 7:00 AM by wndpteam
Consider a case where a network application calls Windows QoS APIs to add a layer-2 IEEE 802.1Q UserPriority tag (almost always referred to as 802.1p ) to outgoing traffic. Ascertaining whether the tag actually got added to an outgoing packet is not as Read More...
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