NS3000/iX NMMGR Screens Reference Manual - Edition 8 (36922-90038)

Chapter 9 189
FDDI Network Interface Configuration Screens
FDDI Network Interface Configuration
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:
• 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
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 15, “Network
Directory,” for information about the network directory.
Default value: N
Range: Y or N