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Appendix D: Troubleshooting Procedures
Solving TCP/IP Connection Problems
1. If a client cannot connect to the DEFINITY LAN Gateway, check the Client
Access Logs screen to see if any error messages appear related to that
client. (Access the Main Menu screen and select Maintenance, then
Security Logs, and then Client Access Logs.)
If a TCP_Connect message appears in the log from the Name or
IP address of that client, then the DEFINITY LAN Gateway and the
client are able to communicate. Check the messages that follow the
TCP_Connect message for that client.
1. If either InvalidClient or InvalidLink appears, then
check the Brouter Administration.
2. If either ClientTooSlow, InvalidDataSize, or
UnsupportedVersion appears, then the client is violating
the connection protocol.
If a TCP_Connect message does not appear in the log, then the
DEFINITY LAN Gateway and the client cannot communicate.
Check the following:
1. Is the DEFINITY LAN Gateway administered with the correct
name, IP address, and subnet mask? (Access the Main
Menu, select TCP/IP Administration, and then select This
Host.) The DEFINITY LAN Gateway must be rebooted after
any changes are made to this information.
2. If the client is on a different network (or subnet if a subnet
mask is in use), does the DEFINITY LAN Gateway have a
correct, working route to the network (or subnet) where the
client resides? This route could be either via the Default
Gateway or a route in the Network Routing Table. (Access
the Main Menu, select TCP/IP Administration, and then
Network Routing Information, and finally, select either
Default Gateway or Network Routing Table.)
2. If everything in the second bullet item above is properly administered and
the client still cannot communicate with the DEFINITY LAN Gateway, try
the following:
A. Ping a machine on the same network (or subnet) where the
DEFINITY LAN Gateway resides. Be sure that this machine is up
and running and is responding to ping from other machines. If the
DEFINITY LAN Gateway cannot successfully ping this machine (no
answer from machine_name), contact the TSC. (Access the Main
Menu, select Maintenance, and then select Ping Host.)
B. If the DEFINITY LAN Gateway is on a different network (or subnet)
from the client, try the following:
1. Ping the gateway, which routes packets to the client. This
could be either the Default Gateway or a route found in the
Network Routing Table. If the DEFINITY LAN Gateway
D-4 Issue 1 January 1996