Systems and methods for monitoring network fabric memberships. In one embodiment, the method comprises: 1) determining a polling list of switches; and 2) processing each switch in the polling list. The processing may include: a) obtaining a list of sister switches from the current switch; b) associating the current switch with a new kith if the current switch is not already associated with a kith; c) identifying any of the sister switches associated with different kiths and merging said different kiths with the kith of the current switch; and d) associating each of the sister switches with the kith of the current switch. (A kith is an inclusive collection of switches constructed by combining lists of sister switches from each switch in the polling list.) The method may further comprise performing a matching operation between the kiths and a set of fabrics in a model of the network.