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 4-2 “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.
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