The Index for a Filter in an ATM address filter set. The filters are
matched in the ascending order of atmAddressFilterSetIndex. A filter
with a lower atmAddressFilterSetIndex value is matched prior to a
filter with a higher atmAddressFilterSetIndex value. The only
exception to this rule are those address filters that specify all
20-bytes without using wildcards. These filters are matched before
any other wildcard filter in a filter-set irrespective of the
atmAddressFilterSetIndex value.