Reference: NID2982
        
This MIB specifies objects for configuring Ethernet-like
services and devices.  It models trail termination points
(TTPs) for Ethernet Transport Service as virtual interfaces.
It also includes objects for configuration of the physical
interfaces (ports).  1+1 protected transport is provided
using virtual interfaces as interface groups.  Physical and
logical interfaces are connected to Forwarding Functions.
        
The configuration model consists of the following primary
tables:
        
ethDeviceTable.  This table contains one entry for every
    device (board).  Its primary function is to provide
    capability information about the objects such as
    forwarding functions and interfaces on the device.
        
ethIfTable.  Table with all interfaces, both physical (dot3),
    logical (ETS), and virtual ports as interface group.
    The table contains an entry for every port.  It contains
    configuration objects common to all port types.
        
ethDot3Table.  Table that contains an entry for every
    physical port.  The table holds the data related to the
    physical port.  Note that the port is also represented in
    the ethIfTable, and is referenced by the same index in
    both tables.
        
ethEtsTable.  Table that contains one entry for every
    Ethernet Transport Service Trail Termination Point (ETS
    TTP).  A TTP is used to connect a port to a remote port
    using a connection over the DTM network.  Note that the
    port is also represented in the ethIfTable, and is
    referenced by the same index in both tables.
        
ethIfgTable.  This table contains one entry for every
    interface group.  An interface group is a virtual port
    that represents the transport over two paths to a remote
    interface group for 1+1 protected transport.  The two
    paths are implemented using two ports from the
    ethEtsTable.
        
ethFwdFuncTable.  This table contains an entry for every
    forwarding function.  Physical and ETS ports must be
    associated with a forwarding function.  The forwarding
    function then forwards Ethernet frames between the
    different associated ports.  Configuration objects on the
    forwarding function and the associated interfaces control
    how frames are forwarded to the different ports.
        
        
In addition to the primary tables, there are some other
tables:
        
ethFwdDiffservTable.  Configuration of differentiated service
    code points to flow group map for a forwarding function.
        
ethIfQueueTable.  Configuration of a port's queues.
        
ethIfQDropThresholdTable.  Configuration of drop thresholds
    for combination of traffic class and drop precedence per
    interface.
        
ethIfVLANSetsTable.  Configuration of a the port's VLAN
    membership.
        
ethEtsTConnectionTable.  References to connections that are
    terminating in a Trail Termination Point.
        
ethEtsIndexLookupTable.  Reverse-lookup of an entry in the
    ethEtsTable based on known DSTI.
        
        
The following two tables contains information regarding the
Rapid Spanning Tree Protocol:
        
ethFwdRstpTable.  The table contains data related to the
    bridge for the Rapid Spanning Tree Protocol. This table
    is indexed with the same index as the ethFwdTable.
        
ethIfRstpTable.  The table contains data related to the port
    for the Rapid Spanning Tree Protocol. This table is
    indexed with the same index as the ethIfTable (and
    ethDot3Table and ethEtsTable).