Determines member and service types of this virtual circuit when part of a multicast group. Options: noMulticastAssociation (1): PVC is not part of multicast group rootOneWay (2): PVC is a root member whose multicast server sends frames received from this root member only to route partners of the multicast group's active leaf members (one-way multicast service) leafOneWay (3): PVC is a leaf member that cannot receive a root member's frames from a multicast server (one-way multicast service) rootTwoWay (4): PVC is a root member whose multicast server sends frames received from this root member to this multicast group's active leaf members; the multicast server also sends frames received from any active leaf member to the root member (two-way multicast service) leafTwoWay (5): PVC is a leaf member whose multicast server sends frames received from this leaf member to this multicast group's root member (two-way multicast service) rootNWay (6): PVC is a root member whose multicast server sends frames received from this root member to this multicast group's other active root members; the multicast server also sends frames received from any other active root member to all other active root members (N-way multicast service) rootTwoWaySinglePass (7): PVC is a root member whose multicast server sends frames received from this root member to this multicast group's first active leaf members found only; the multicast server also sends frames received from any active leaf member to the root member (two-way multicast service) leafTwoWaySinglePass (8): PVC is a leaf member whose multicast server sends frames received from this leaf member to this multicast group's root member (two-way multicast service) Default Value: noMulticastAssociation (1)