Trusted Extensions Multicast Packets
Trusted Extensions can add labels to multicast packets within a LAN. This feature enables you to send labeled multicast packets to CIPSO or CALIPSO systems that operate at the same label or within the label range of the multicast packets. On a heterogeneous LAN, that is, a LAN with both labeled and unlabeled hosts, multicast cannot verify the membership of a multicast group.
 | Caution - Do not send labeled multicast packets on a heterogeneous LAN. Leakage of labeled information could occur. |