HP 3000 Manuals

NS3000/iX NMMGR Screens Reference Manual

Point-to-Point Network Interface Configuration 

The point-to-point network interface (NI) allows the upper layers of the
transport protocol to communicate with the data link layer.  The
Point-to-Point Network Interface Config screen (#101) in figure 6-3 is
displayed when you select an NI name of NI type ROUTER at the Network
Interface Configuration screen (figure 6-2) 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 point-to-point NI.


          Figure 6-3.  Point-to-Point Network Interface Config 

Press the [Save Data] function key to transfer the data displayed on the
screen to the configuration file you are creating or updating.  Verify
that the data record has been created by checking that the Data flag is
set to Y.

Fields 

Network hop count         This is the maximum number of hops that a
                          packet entering the network can make.  It is
                          the distance between the two most remotely
                          separated nodes on the network.  Distance is
                          measured in terms of hops, where each
                          intermediate node between two end nodes is
                          counted as a hop.

                          The network hop count determines a packet's
                          time to live; that is, the time (in numbers of
                          hops) that a packet is allowed to remain in the
                          network.  A packet whose time to live has
                          expired can be assumed to be undeliverable
                          because of some undetected routing anomaly and
                          will be discarded.  If this value is set too
                          low, the danger exists that packets will be
                          discarded prematurely (that is, before they
                          reach their destination).  If the value is set
                          too high, an undeliverable packet may remain in
                          the network too long, and possibly contribute
                          to network congestion.

                          Default value:  None

                          Range:  1-1024

Idle device timeout       This field is relevant only if the link is a
value (seconds)           dial link.  For those devices that have the
                          idle device timer enabled, if there is no
                          activity during this time interval, the device
                          is considered to be inactive and will be shut
                          down.  A timeout value of zero disables the
                          idle device timer for the link on this network
                          interface, thus overriding any enabled device
                          timer (see "Related screens," below).  The
                          purpose of the idle device timer is to shut
                          down dial links that have become idle.

                          Related screens:

                             *   NETXPORT.NI.NIname.LINK.linkname 

                                 An entry in this screen enables/disables
                                 the idle device timer.

                             *   NETXPORT.GPROT.TCP

                                 The connection assurance interval set in
                                 this screen must be less than the idle
                                 device timeout value configured in the
                                 current screen.

                          Default value:  None

                          Range:  0-32400

Number of outbound        This field specifies the number of buffers to
buffers                   be allocated for outbound data.  Outbound
                          buffers are 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:  32-2048

MPE/iX 5.0 Documentation