System information

Introduction
15
with OS/400 V4R2, a special type of TCP/IP can run over a twinax network. In
addition, you must create a relationship between the workstation controller
and a TCP/IP interface. A TCP/IP interface is needed to identify your
workstation controller to your AS/400 server and IBM Network Stations. Each
TCP/IP interface
must have a unique IP address. The IP addresses for twinax
IBM Network Station models are assigned by the TDLC (Twinax Data Link
Control) component on the AS/400 system.
The IBM Network Stations attached to the workstation controller act as if they
are a TCP/IP subnet. Therefore, the subnet represented by the TCP/IP
interface has a network address and a subnet mask. The twinax subnet also
uses a Domain Name Server (DNS), just like any other subnet.
The twinax interface works like any other local area network (LAN) interface.
It interacts with the other LAN cards on your AS/400 system in much the
same way as a router's multiple interfaces work together. The interface
passes packets from your twinax Network Stations to a LAN card on the same
server. The LAN card forwards the packets to a router and out to the Internet.
Appendix B in the
IBM Network Station Manager Installation and Use,
SC41-0664, can assist you in planning for and implementing twinax attached
IBM Network Stations. In addition, Chapter 5, “Twinax Attachment of Network
Stations” on page 127 in this redbook discusses the implementation of twinax
IBM Network Stations.
1.2.8 Streaming LPR/LPD Support
Printing capabilities have been significantly enhanced in Release 3 of IBM
Network Station Manager for AS/400 as a result of adding support for the
TCP/IP LPR/LPD protocol (RFC 1179). LPR is an acronym for Line Printer
Requester and LPD is an acronym for Line Printer Daemon. This protocol
enables the IBM Network Station to function as a print client or print server.
This support also includes LPR/LPD streaming support, which is a draft
extension to RFC 1179.
If LPD on the server does not support streaming (AS/400 system has
supported this since V2R2), then LPR on the IBM Network Station attempts
to build a complete spool file using available memory on the Network Station.
This new printing support allows local client applications on the IBM Network
Station to send print jobs to remote print servers or remote printers. In
addition, remote print clients are able to send print jobs to either the serial
port or parallel port on the IBM Network Station. However, more importantly,
the AS/400 (at V4R2 or later) system has the capability to transform one data