NS3000/iX NMMGR Screens Reference Manual - Edition 9 (36922-90040)

Chapter 8 179
Token Ring Network Interface Configuration Screens
Token Ring Network Interface Configuration
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 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 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 describe above. Refer to Chapter 13 ,
“Network Directory,” for information about the network
directory.
Default value: N
Range: Y or N