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Internet Protocol Configuration

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The IP Protocol Configuration screen (#156) in Figure 9-5 "IP Protocol Configuration Screen" is displayed when you press the [Go To IP] function key at the Protocol Configuration screen (Figure 9-4 "Protocol Configuration Screen"). It is also displayed when you type the path name:

@NETXPORT.NI.NIname.PROTOCOL.IP

in the command window of any screen and press the [Enter] key, where NIname is a configured FDDI NI.

Figure 9-5 IP Protocol Configuration Screen

[IP Protocol Configuration Screen]

This screen is used to supply IP protocol information for the network being configured. Each NI has an IP address. The IP address field is a key element in IP routing and datagram delivery algorithms. The IP subnet mask field allows you to identify an IP subnet mask for the NI named in the path. The store and forward buffers field is useful for internal resource allocation and performance tuning.

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.

Fields

Store & forward buffers

This field allocates buffers to support store-and-forward over the network interface being configured. You do not need to allocate store-and-forward buffers if you are configuring a non-gateway node on this network. You must allocate store and forward buffers if you are configuring an internet gateway and packets from another network will be forwarded over this network interface.

The number of store-and-forward buffers can be configured to allow performance tuning for different network types. However, HP recommends that you use 20 as the store-and-forward buffers. Consult your HP representative before modifying this value.

If store-and-forward is to be disallowed, set this number to 0.

Default value: 0

Range: 0-50

NOTE: If this node is a gateway node, HP recommends that you use 20 as the store-and-forward buffers.

IP internet address

Enter the internet protocol (IP) address for the network interface being configured.

There are two methods of entering an internet protocol (IP) address within NMMGR:

  1. Enter the fully qualified IP address (for example, Class C, C 192.191.191 009)

    OR

  2. Enter only the network (nnn) and node (xxx) portions of the IP address as four positive integers between 0 and 255 separated by periods or blanks (for example, 15.123.44.98).

    You need not enter the following items as NMMGR will fill these in:

    - Class A, B, C

    - Leading zeros for the network and node portion of the IP address.

Addresses are made up of a network portion and a node portion. The supported classes of network addresses have the following forms:

Class C:

C nnn.nnn.nnn xxx

Class B:

B nnn.nnn xxx.xxx

Class A:

A nnn xxx.xxx.xxx

where nnn is a value ranging from 000 to 255, representing eight bits of the network portion of an address and xxx is a value ranging from 000 to 255, representing the node portion of an address.

The leftmost group of nnn has the following ranges for each address class:

Class C:

192-223

Class B:

128-191

Class A:

001-126

Network and node values of all zeros or all ones are not allowed. These are special values.

Default value: No default, but a value must be supplied.

IP subnet mask (optional)

An IP subnet mask is used when configuring subnetworks. The mask identifies which bits on an IP address will be used to define a subnetwork. An IP subnet mask is specified in the same format as an IP address. The 32-bit mask is grouped in octets expressed as decimal integers and delimited by a period "." or a space. For example, a mask for a class A network with the subnet field being the first 8 bits of the node portion would be expressed as 255 255.000.000. The default is no IP mask.



Protocol Configuration

Address Resolution Protocol (ARP) Configuration