FTP Architecture

This section describes the FTP architecture and the overall network architecture for a system that includes FTP.

Figure 4-1 “FTP Client-Server Model” shows the FTP client-server model. The FTP commands and replies are the messages and errors you can receive as described in Appendix A “Error Messages”

Over the data connection, files and directory information are transferred. Data is transferred in a defined format. Once the data has been received, it is converted to the file system supported by the receiving system.

Figure 4-1 FTP Client-Server Model

Figure 4-2 “Network Architecture” shows the network architecture for an installation including FTP over TCP/IP Ethernet/802.3 LAN and an X.25 wide area network.

The MPE/iX FTP implementation consists of the FTP monitor process which returns errors in the jobstream output (see Appendix A “Error Messages” for possible errors returned).

To troubleshoot network problems, you can refer to Figure 4-2 “Network Architecture” to determine logging and tracing required. See the NETCONTROL command in the NS 3000/iX Operations and Maintenance Manual for information on starting, stopping, status, and tracing the lower level protocols and NIs.

Figure 4-2 Network Architecture