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i am also struggling to understand this. As per TAC, we need to select the checkbox if we want our controller to consider the interference from foreign access point and select a different channel during DCA calculation.
We are having the similar problem and we saw that the MAC address of VLAN on 4500 is being spoofed. We saw that all users in a specific VLAN started complaining that they cant connect. investigation identified that their gateway MAC is being learnt f...