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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 Configuration screen (#101) in
Figure 6-3 "Point-to-Point Network Interface
Configuration Screen" is displayed when you select an NI name of NI type
ROUTER at the Network Interface Configuration screen
(Figure 6-2 "Network Interface Configuration
Screen") 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 Configuration Screen
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 value (seconds)
This field is relevant only if the link is a 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." 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 buffers
This field specifies the number of buffers to 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:
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