The object identifies the name given to bridge
instance to which the SNMP context is mapped to.
Value of this object cannot be changed when the
RowStatus object in the same row is 'active'.
This is typically a human-readable string. This is
the same ASCII string used in the router's console
interface to refer to this bridge instance.
When the value of this object is a zero length
string, it indicates that the SNMP context is
independent of any bridge instances.