6.3. The System Group

          -- the System group

          -- Implementation of the System group is mandatory for all
          -- systems.  If an agent is not configured to have a value
          -- for any of these variables, a string of length 0 is
          -- returned.

          sysDescr OBJECT-TYPE
              SYNTAX  DisplayString (SIZE (0..255))
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "A textual description of the entity.  This value
                      should include the full name and version
                      identification of the system's hardware type,
                      software operating-system, and networking
                      software.  It is mandatory that this only contain
                      printable ASCII characters."
              ::= { system 1 }

          sysObjectID OBJECT-TYPE
              SYNTAX  OBJECT IDENTIFIER
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "The vendor's authoritative identification of the
                      network management subsystem contained in the
                      entity.  This value is allocated within the SMI
                      enterprises subtree (1.3.6.1.4.1) and provides an
                      easy and unambiguous means for determining `what
                      kind of box' is being managed.  For example, if
                      vendor `Flintstones, Inc.' was assigned the
                      subtree 1.3.6.1.4.1.4242, it could assign the
                      identifier 1.3.6.1.4.1.4242.1.1 to its `Fred
                      Router'."
              ::= { system 2 }

          sysUpTime OBJECT-TYPE
              SYNTAX  TimeTicks
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "The time (in hundredths of a second) since the
                      network management portion of the system was last
                      re-initialized."
              ::= { system 3 }

          sysContact OBJECT-TYPE
              SYNTAX  DisplayString (SIZE (0..255))
              ACCESS  read-write
              STATUS  mandatory
              DESCRIPTION
                      "The textual identification of the contact person
                      for this managed node, together with information
                      on how to contact this person."
              ::= { system 4 }

          sysName OBJECT-TYPE
              SYNTAX  DisplayString (SIZE (0..255))
              ACCESS  read-write
              STATUS  mandatory
              DESCRIPTION
                      "An administratively-assigned name for this
                      managed node.  By convention, this is the node's
                      fully-qualified domain name."
              ::= { system 5 }

          sysLocation OBJECT-TYPE
              SYNTAX  DisplayString (SIZE (0..255))
              ACCESS  read-write
              STATUS  mandatory
              DESCRIPTION
                      "The physical location of this node (e.g.,
                      `telephone closet, 3rd floor')."
              ::= { system 6 }

          sysServices OBJECT-TYPE
              SYNTAX  INTEGER (0..127)
              ACCESS  read-only
              STATUS  mandatory
              DESCRIPTION
                      "A value which indicates the set of services that
                      this entity primarily offers.

                      The value is a sum.  This sum initially takes the
                      value zero, Then, for each layer, L, in the range
                      1 through 7, that this node performs transactions
                      for, 2 raised to (L - 1) is added to the sum.  For
                      example, a node which performs primarily routing
                      functions would have a value of 4 (2^(3-1)).  In
                      contrast, a node which is a host offering
                      application services would have a value of 72
                      (2^(4-1) + 2^(7-1)).  Note that in the context of
                      the Internet suite of protocols, values should be
                      calculated accordingly:

                           layer  functionality
                               1  physical (e.g., repeaters)
                               2  datalink/subnetwork (e.g., bridges)
                               3  internet (e.g., IP gateways)
                               4  end-to-end  (e.g., IP hosts)
                               7  applications (e.g., mail relays)

                      For systems including OSI protocols, layers 5 and
                      6 may also be counted."
              ::= { system 7 }