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  • Hi,
    Iam very happy to see so many responses.But i still could not understand the behaviour of devices like Cisco.

    When a long only station(11b) associates to Cisco AP which is short preamble capable, it should signal all the stations in the AP to use long preamble.Otherwise if any station sends any frame in short preamble the long only station cannot decode the NAV. So, How does the AP signal to all the stations to use long preamble only ? The only way it can do is to reset or unset the the preamble capability bit in beacon and tell all the stations to use only long preambles (for 11b stations).

    But in devices like Cisco or D-Link this does not happen ? The preamble capability bit is still set in the beacon regardless of the preamble the network/BSS is currently using.What does this behaviour mean?

    Please clarify my doubt with paitience ....!


    With regards,
    Murali

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