NS3000/iX Operations and Maintenance Reference Manual (36922-90039)

64 Chapter5

Common Network Problems

Command Errors

• A network was not started by the local console operator, the remote

console operator, or any intermediate nodes. Check that all required

commands have been issued on the local, remote, and intermediate

nodes. The network interfaces, the LAN NI, the loopback NI,

point-to-point NI, X.25 NI, token ring NI, and gateway half NI, must

be initialized with NETCONTROL START commands. The DTC/X.25

Network Access card in the DTC must be started; refer to Using the

OpenView DTC Manager or Conﬁguring and Managing Host-Based

X.25 Links. The Network Services must be initialized with the

NSCONTROL START command. Some links may also need to be

started by NETCONTROL ADDLINK commands. Links can be

conﬁgured not to be started when a NETCONTROL START command

is executed and be started via NETCONTROL ADDLINK. Links may

have been closed by NETCONTROL DELLINK or may have been closed

because an irrecoverable error was detected on the line.

• The remote node may not be operational.

• The remote operator may have lowered the session limit. This would

cause a failure in a REMOTE HELLO or a DSCOPY or RPMCREATE that

tried to automatically log on to a session.

• The local console operator may have used the service list of the

NSCONTROL command to limit the Network Services to incoming

users only. On the remote node, the operator may have limited the

Network Services to outgoing only. This would cause a REMOTE

HELLO, DSCOPY, remote FOPEN, or RPMCREATE to fail, depending on

which services were not started.

• If the line is a dial up line, a failure in a REMOTE HELLO, DSCOPY or

RPMCREATE can be caused by the following:

• If auto dial, the number was busy, wrong, or was never answered

at the remote computer.

• The security strings did not match at either the local or remote

node (if security was enabled).

• The IP address of the remote node was not conﬁgured as a

candidate for use of this link.

• If the link is a shared dialup link, a failure will occur if the link is

connected to a node different than the one issued in the DSLINE

command.

• When a REMOTE HELLO is issued which causes the phone to be

dialed, there is a window in which subsequent REMOTE HELLOs

from other users will be rejected. The window is from the time the

auto dial starts (or dial request) to when the connection is

established.