The LAN Network Interface Configuration screen (#89) in Figure 5-3 “LAN Network Interface Configuration
Screen” is displayed when you
select an NI name and the NI type LAN at the Network Interface Configuration
screen (Figure 5-2 “Network Interface Configuraiton 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 LAN NI name.
Figure 5-3 LAN Network Interface Configuration
Screen
The LAN 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, with the exception of the HP UPC number, 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
LAN link and internetwork routing.
Choose the item you wish to configure, and press the corresponding
key.
Fields
- Network segment size (bytes)
(HP modifiable.) This field
specifies the largest packet (including all data, protocol headers,
and link level headers) that will be sent by the LAN device. The
only reason for entering a value smaller than 1514 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: 1514 bytes
Range: 300-1514
- HP UPC number
(HP modifiable.) The HP
universal product code, which is used to establish an HP-unique
address used by the probe protocol.
Default value: 08-00-09
Change the default only in rare circumstances. If all nodes
on the LAN are not configured with identical HP UPC numbers,
probe multicasts will not be universally recognized by nodes on
the LAN.
- 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)
If you have non-HP nodes on the LAN (nodes that
do not support either ARP or probe protocols,) 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 LAN
and the network directory has been configured. Refer to Chapter 15 “Network Directory” for information
about the network directory.
Default value: N
Range: Y or N
- Enable Ethernet? (Y/N)
This flag enables the Ethernet protocol to run either
by itself or with the IEEE802.3 protocol. You can enable one or
the other or both of these protocols simultaneously. One or the
other must be enabled (you cannot disable both).
Ethernet is enabled by default. Disabling Ethernet has the effect
of disabling the ARP protocol as well.
Default value: Y
Range: Y or N
- Enable IEEE802.3? (Y/N)
This flag enables the IEEE 802.3 protocol
to run either by itself or with the Ethernet protocol. You can enable
one or the other or both of these protocols simultaneously. One
or the other must be enabled (you cannot disable both). IEEE 802.3
is enabled by default. Disabling IEEE 802.3 has the effect
of disabling the probe protocol as well.
Default value: Y
Range: Y or N