This MIB module defines management objects for the Multicast Switching features on Cisco Layer 2/3 devices. Definition of some of the terms used in this MIB: Multicast Replication - The mechanism by which a system creates one or more copies of a multicast packet for forwarding. Ingress Multicast Replication - A type of multicast replication where the replication engine on the ingress module always performs the whole replication. Egress Multicast Replication - A type of multicast replication where the replication engines on both the ingress and egress modules perform the replication. VPN - Virtual private network. A secure IP-based network that shares resources with one or more physical networks. VRF - VPN Routing and Forwarding instance Consists of an IP routing table, a derived forwarding table, a set of interfaces that use the forwarding table, and a set of rules and routing protocols that determine what goes into the forwarding table. MVPN - Multicast VPN MVRF - Multicast VRF A VRF which has multicast routing enabled. VRF-lite - A feature that enables a service provider to support two or more VPNs, where IP addresses can be overlapped among the VPNs. LTL - Local Target Logic A hardware resource table to aid in switching. OIF - Outgoing Interface The interface through which packets are forwarded out. DF - Designated Forwarder.