HP 3000 Manuals

NS3000/iX NMMGR Screens Reference Manual

Token Ring Network Interface Configuration  

The Token Ring Network Interface Configuration screen (#88) in figure 8-3
is displayed when you select an NI name and the NI type TOKEN at the
Network Interface Configuration screen (figure 8-2) and press the [Add]
or [Modify] function key.  It is also displayed when you type the path
name:

@NETXPORT.NI.NIname 

in the command window of any screen and press the [Enter] key, where
NIname is a configured token ring NI name.


          Figure 8-3.  Token Ring Network Interface Configuration 

The token ring network interface (NI) module serves to interface the
upper layers of the transport product to the link layer.  This screen
supplies the information required for that interface.  All of the fields
are used for internal resource allocation.

Press the [Save Data] function key to transfer the data displayed on the
screen to the configuration file you are creating or modifying.  Verify
that the data record has been created by checking that the Data flag is
set to Y. From this screen you proceed to the screens used to configure
the network layer protocols, the token ring network interface link, and
internetwork routing.

Choose the item you wish to configure, and press the corresponding key.

Fields 

Network segment size      This field specifies the largest packet that
                          will be sent by the token ring device.  The
                          only reason for entering a value smaller than
                          1984 is to make better use of memory for those
                          systems where it is known that upper layer
                          services will always send shorter messages.
                          Note that whenever packets larger than the
                          network segment size are sent, they will be
                          fragmented to the network segment size, thus
                          incurring fragmentation overhead at the source
                          and assembly overhead at the destination node. 

                          Default value:  1984 bytes

                          Range:  300-1984

Number of outbound        This field specifies the number of buffers to
buffers                   be allocated for outbound data.  Outbound
                          buffersare used for outbound data packets and
                          are held by the transport until they are
                          acknowledged by the destination node.
                          Underallocation may adversely affect TCP
                          throughput.  Overallocation may waste core
                          memory.

                          Related screen:

                             *   NETXPORT.GPROT.TCP

                                 The maximum number of connections is
                                 configured here.  If it is increased,
                                 consider increasing the number of
                                 outbound buffers also.

                          Default value:  128

                          Range:  128-4096

Load network directory    Specifies whether or not the system should load
mapping?  (Y/N)           mappings from the network directory at network
                          startup.  If you have nodes on the token ring
                          that do not support the ARP protocol, you must
                          enter these nodes into the network directory
                          and set load network directory mapping to Y. HP
                          nodes support the ARP protocol.

                          HP recommends the default unless it is for the
                          situation described above.  Refer to chapter 13
                          for information about the network directory.

                          Default value:  N

                          Range:  Y or N

MPE/iX 5.0 Documentation