This is the MIB Module for the DOCSIS Set-top Gateway (DSG). The DSG provides a one-way IP datagram transport for Out-Of-Band (OOB) messaging to cable set-top terminals. The one-way IP datagram transport is called a DSG Tunnel. A DSG Tunnel is a multicast IP datagram stream originating at the DOCSIS Set-top Gateway and carrying Out-Of-Band messages intended for set-top terminals. It is carried over one or more downstream DOCSIS channels and is identified by a well know Ethernet unicast MAC address. The well-known Ethernet unicast MAC address is reserved and published by the Conditional Access/Point Of Deployment (CA/POD) provider. A CA/POD provider is limited to eight DSG Tunnels to transport their OOB Messaging. Multiple DSG Tunnels may exist on a single downstream DOCSIS channel. This MIB is implemented as 3 groups, the CA Vendor Table, the DSG Tunnel Table and the Downstream Table. 1) The DSG CA Vendor Table associates a CA Vendor Name with a CA Vendor Index and the current count of tunnels carrying this CA OOB 2) The DSG Tunnel Table associates an input IP Address and an output MAC Address with a CA Vendor Index. 3) The DSG Downstream Table associates a tunnel Index with a DOCSIS downstream channel interface index (ifIndex). These tables are all dynamic in nature. Individual rows can be created or deleted as necessary. In general, the DSG is configured once per CA system.