Microsoft KB Archive/302348

= Bridge May Not Work With a Non-Promiscuous Mode Network Adapter =

Article ID: 302348

Article Last Modified on 12/1/2007

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APPLIES TO


 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional
 * Microsoft Windows XP Professional x64 Edition

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This article was previously published under Q302348



SYMPTOMS
Some network interface cards (NICs) may not work after you try to create a network bridge. Specifically, the bridge seems to be created but it does not work (traffic is not passed).



CAUSE
This problem occurs because some NICs do not automatically enter into Promiscuous mode to create a successful network bridge.



RESOLUTION
To work around this behavior, force the adapter into Compatibility mode:  At a command prompt, type netsh bridge show adapter . Locate the identification number of the NIC that is not responding. If the NIC is not in Compatibility mode, you can change it manually if you type the following command, where 1 is the number of the NIC that is displayed in the first step:

netsh bridge set adapter 1 forcecompatmode=enable

 Run the netsh bridge show adapter command again to verify that the ForceCompatabilityMode field for the NIC is displayed as Enabled.



MORE INFORMATION
The following NICs may exhibit this behavior:
 * Proxim Symphony Cordless PnP ISA card
 * DWL-120 USB 802.11b
 * 5.8GHz RadioLAN card

Additionally, contact the manufacturer or check their Web site for more information about possible updates.

The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.

Additional query words: adapter wireless

Keywords: kbprb KB302348

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