IBM SC41-5420-04 manual Subnet mask, Line description, Associated local interface, Automatic start

Subnet mask

Defines which part of an Internet address forms the subnet (subnetwork) field of an Internet address. An example of a single-network subnet mask is: 255.255.255.128.

Line description

Contains information describing a communications line that is attached to the iSeries server, as defined previously in “Step 1—Configuring a Line Description” on page 10.

To find the names of the currently defined line descriptions, use the Work with Line Descriptions (WRKLIND) command.

Associated local interface

Allows the network to which this interface is attached appear to be part of the same network that the associated local interface is attached to. This is referred to as transparent subnetting.

Transparent subnetting allows TCP/IP traffic to flow between the two physical networks without defining additional routing. This is only valid for broadcast-capable networks. This also requires the Internet address for Add TCP/IP Interface (ADDTCPIFC) to be configured in the same network as the associated local interface. An additional requirement is for the subnet mask that is defined for the associated local interface.

Automatic start

Refers to whether the TCP/IP interface is started automatically whenever TCP/IP is started. The default setting is *YES. If you choose *NO, you must start the interface yourself by using the STRTCPIFC command or by selecting option 9 (Start) on the Work with TCP/IP Interfaces display, as shown in Figure 4 on page 12.

To add a TCP/IP interface, do the following:

1.Enter GO TCPADM to get the TCP/IP Administration menu.

2.Select option 1 to get to the Configure TCP/IP menu.

3.Select option 1 on the Configure TCP/IP menu.

The Work with TCP/IP Interfaces display is shown in Figure 4 on page 12.

4.Type option 1 (Add) at the input-capable top list entry on this display to go to the Add TCP/IP Interfaces (ADDTCPIFC) display, as shown in Figure 3 on page 12.

(You can go directly to this display by typing ADDTCPIFC command on any command line and pressing F4.)

iSeries TCP/IP supports multihoming, which allows you to specify multiple interfaces for each line description. See “Multihoming Function” on page 56 for further information.

Chapter 1. Configuring TCP/IP 11