Using TEMPIP interfaces

You can configure a TEMPIP interface by configuring the interface with the TEMPIP parameter. The TEMPIP parameter allows the interface to be started with an IP address of 0.0.0.0 instead of a statically defined IP address. The 0.0.0.0 IP address enables TEMPIP interfaces to broadcast and multicast IP traffic. Unicast traffic cannot use TEMPIP interfaces. The TEMPIP parameter can be configured only on the IPv4 IPAQENET OSA-Express QDIO INTERFACE statement.

About this task

TEMPIP interfaces are used in a unit test environment to support applications that provide a DHCP client, such as IBM® Rational® Developer for System z® Unit Test feature (Rdz-UT).

Procedure

To use a TEMPIP interface, take the following steps:

  1. Define an interface with the TEMPIP parameter instead of the IPADDR parameter.
  2. Start the interface.
  3. Use UDP broadcasts to communicate with the DHCP server to obtain an IP address, subnet, default router, and DNS servers.
  4. Stop the interface.
  5. Use the V TCPIP,,OBEYFILE command to delete the interface.
  6. Configure the interface in the TCP/IP profile with the IPADDR parameter and the IP address that is obtained with DHCP. Routing information and DNS server information must be configured in the correct data files. Use the V TCPIP,,OBEYFILE command to add the new interface.
  7. Start the interface.