telnet command successful?
YES 
Connection stays up?
YES 
NO
NO
4.Verify that the directory and file protection on the files to be copied or the .rhosts file on the remote system are correct.
5.If you are using NFS, see the appropriate NFS documentation.
If the telnet command is not successful, there is a problem with the Transport Layer (OSI Layer 4). Do the following:
1.Verify whether you have a problem with a pseudoterminal driver (pty) on your system by issuing the ftp command to the remote host. If the command is successful, there is a problem with a pty on your system. Contact your HP representative. See “Reporting Problems ” (page 92) for more information.
2.Check the /etc/protocols file on both hosts to ensure that TCP is installed and configured. Neither telnet nor ftp will work if TCP is not configured on both sides of the connection.
If it is not, install TCP and issue the telnet command again.
3.Transfer a file to a different remote host on the network. Use the netstat command to check for lost packets.
If network congestion does not appear to be the cause, contact your HP representative. See “Reporting Problems ” (page 92) for more information.
If the connection terminates abnormally or a network application appears to hang, complete the following steps:
1.Confirm that the NIC is properly configured.
2.Make sure the cabling from the local host to the network is intact and properly connected.
3.Test the network connectivity between the link aggregate and other hosts on the same subnet using the ping command.
4.Verify the link aggregate membership. See the steps for Link aggregate enabled?.
5.Verify that there is an IP address configured on the link aggregate and that the IP interface is up with the ifconfig command. If it is not up, bring it up with the following command:
# ifconfig interface-name up
Test the connection with the ping command.
6.Test the network connectivity between another interface on the server and other hosts on the same subnet. If this fails, there is a network problem.
7.Examine the traffic over the link aggregate. Heavy traffic might cause the LACP system to lose communication, which can cause the link aggregate to lose connection with other ports or cause the LACP link aggregate to go down temporarily. Reduce the traffic on the link aggregate.
78 Troubleshooting HP APA