Troubleshooting
Diagnostic Flowcharts
Flowchart 8: Procedures
A.Execute: telnet to remote host. Try to establish a
telnet connection to the remote host.
B.Successful? If your telnet attempt was successful, stop. The connection is o.k. through the Transport Layer (OSI Layer 4).
C.Execute: ftp to remote host. Unlike telnet, ftp does not go through a pseudoterminal driver (pty) on your system. This step tests to see if the pty is why telnet failed.
D.Successful? If ftp is successful, you likely have a problem with a pty on your system. Contact your HP representative.
E.TCP not configured on local nor remote host? Neither telnet or ftp will work if TCP is not configured on either side of the connection. Check the /etc/protocols file on both hosts to be sure TCP is installed and configured.
F.Network congested? If TCP is installed on both hosts, do a file transfer to another remote host on the network. Use netstat(1) to check for lost packets.
If network congestion is not the cause, more detailed diagnostics are required. Again, contact your HP representative.
G.Configure TCP. If necessary, install TCP on either or both hosts. Start again with this flowchart.
Chapter 4 | 81 |