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I am working with a customer who is experiencing an intermittant loss of network connectivity after (or during) long periods of inactivity, such as overnight. Details of the environment include:
Dell Latitude D820 notebook (integrated wireless disabled)
Cisco Aironet Wireless PC Card Adapter (Aironet 802.11 A/B/G model AIR-CB21AG-A-K9)
Driver version 188.8.131.52 (5-19-2006)
Operating System: WinXP SP2
Notebook Power Management: Disabled
Cisco Wireless Power Management: CAM
(Constantly Awake Mode)
AP: AIR-AP1231G-A-K9, updated to A Radio Module AIR-RM21A-A-K9 (making them A-B-G)
AP Software Version: 12.3(8)JEA1
Any thoguhts and/or suggestions would be appreciated, and I'm happy to supply additional information if desired. Thanks!
Many/most/all NICs these days have a setting in the Windows NIC properties for "Allow the system to put this device to sleep"
When the NIC "wakes up" ... it doesn't always re-establish connection, or, it might take a noticable time to re-connect.
Check the NIC properties and unclick the auto-powerdown / sleep checkbox.