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The FDDI Network Interface Configuration screen (#100) in
Figure 9-3 "FDDI Network Interface
Configuration Screen" is displayed when you select an NI name and the NI
type FDDI at the Network Interface Configuration screen
(Figure 9-2 "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 FDDI NI name.
Figure 9-3 FDDI Network Interface Configuration Screen
The FDDI 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 FDDI 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 FDDI device. The only reason for entering a value
smaller than 4032 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: 4032 bytes
Range: 256-4600
- 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:
Default value: 128
Range: 128-4096
- Load network directory mapping? (Y/N)
Specifies whether or not the system should load mappings
from the network directory at network startup. If you have non-HP
nodes on the FDDI (nodes 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 recommends the default unless non-HP nodes are on the network and the
network directory has been successfully completed. Refer to
Chapter 13 "Network Directory" for information
about the network directory.
Default value: N
Range: Y or N
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