If there's two separate corporations with two separate authentication methods, why do you have them sharing the same vlan? I don't understand that design thinking. 20 questions time: Are these SSIDs all broadcast on the same APs? Do you get the same result when associated with every AP? Does the speed change at all, or is it always like this regardless of client mix? What minimum bitrates are you using? Do you have group policies applied to some devices with bandwidth restrictions?
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