Advertised Neighbor Sequence Number

The Advertised Neighbor Sequence Number(ANSN) is a sequence number associated with a nodes advertised neighbor set. This number is however, not increased on every TC generation. The ANSN represents the ``freshness'' of the information contained in the message. This means that whenever a node detects a change in its advertised neighbor set the ANSN is increased. Keep in mind that the advertised neighbor set in a node can, as described later, vary from only the MPR selectors to the entire symmetric neighborhood.