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.