A first device generates a first knowledge digest encoding first configuration information associated with current communications information related to a second device. The first device also generates a second knowledge digest encoding second configuration information associated with cumulative communications information related to the second device. The first device receives from the second device a message including a third knowledge digest encoding third configuration information. The first device compares the first knowledge digest to the third knowledge digest and produces a first indication if the third configuration information encoded in the third knowledge digest is not a subset of the first configuration information encoded in the first knowledge digest. The first device compares the second knowledge digest to the third knowledge digest if the first indication is produced, and produces a second indication if the third knowledge digest is not a subset of the second knowledge digest.