Information about a single LIS of which this system is a member. Membership in a LIS is independent of the actual ATM interfaces being used. The ipoaLisTable defines all LISs that a system is a member of. The ipAddrTable and the ipoaClientTable provides the mapping from local IP address to ATM interface. The ipoaLisIfMappingTable provides the mappings between Logical IP Subnets and interfaces. The ipoaLisTable is indexed by ipoaLisSubnetAddr (IP subnet address). An entry in the ipoaLisTable should exist for each ipAddrEntry that is associated with an ATM related interface used for Classical IP and ARP over ATM traffic. Its ipAdEntAddr and ipAdEntNetMask when ANDed together should equal the ipoaLisSubnetAddr of the corresponding ipoaLisEntry.