LAN Configuration

This chapter covers the following topics:

• Networking choices
• General setup procedure
• Summary of interface IDs

Networking choices

In order to configure TCP/IP you need some type of networking hardware. With QNX TCP/IP, your networking choices include:

• Ethernet
• Token Ring
• FDDI (Fiber Distributed Data Interface)
• SLIP (Serial Line IP) - see the Serial Network Configuration chapter
• PPP (Point-to-Point Protocol) - see the Serial Network Configuration chapter

General setup procedure

To configure your machine to be a client on an Ethernet, Token Ring, or FDDI network, follow these steps:

1. Configure the network adapter as described in the QNX Installation & Configuration guide. This involves bringing up Net and Net.driver.

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   If Net isn't configured before Socket is started, then Socket won't be able to access the network.

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2. Bring up Socket. The only argument you must pass to Socket is a canonical name for the host. For example:

   Socket mymachine &

   Typically the string mymachine comes from the /etc/hosts file.

3. Once Socket is running, configure your interfaces using the ifconfig command. For example:

   ifconfig en1 192.9.200.1
   ifconfig lo0 localhost

   In the above example, the identifier en1 refers to an Ethernet interface on logical LAN 1 in a QNX network.

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   For setups involving two QNX machines, it's easiest to configure QNX networking first.

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Summary of interface IDs

The following table gives the QNX LAN interface IDs for the various hardware protocols supported:

The value of x is simply the logical LAN running the selected hardware (i.e. the argument of the -l option to the Net.driver or the index of the PPP or SLIP device). For more information, see Net.driver in the QNX OS Utilities Reference.