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Troubleshooting Telnet Sessions

Problems can occur when connecting to the remote host, logging into the remote host, and during an active session.

Connection Problems

If you cannot connect to the remote host, use Ping to discover any network problems.

  1. Ping the loopback address of your workstation, 127.0.0.1. This verifies Cisco TCP/IP Suite is working properly and that it can send and receive messages.
  2. Ping your workstation by IP address. This verifies that your workstation is recognized on the network.
  3. Ping your workstation by host name. This verifies that your workstation is recognized on the network and that its host name is being resolved.
  4. Ping the broadcast address on your network. This verifies that your network can broadcast messages.
  5. Ping another host on the same network by IP address. This verifies that your workstation can communicate with other hosts on the network.
  6. Ping another host on the same network by host name, or use the Host Lookup option in Cisco TCP/IP Suite Tools or Ping. This verifies that host names are being resolved.
  7. Ping a host on a different network, first by IP address and then by host name. This verifies that the default route is correct and that host names are being resolved.

Logging In Problems

If you cannot log into the remote host:

  1. Make sure you have a valid account on the remote host.
  2. Make sure you are entering the correct user name and password.

If you have difficulties logging in, your network administrator should be able to help you.

Session Problems

If your Telnet session produces unexpected characters in the activity window, choose the Reset Terminal option from the Host menu. This resets your session to the default terminal settings.

Incorrect terminal type negotiation can cause session problems. To correct this condition, enter an identification string into the Identification String field in either the VT tab, TN3270 tab, or TN5250 tab. Entering an identification string forces Telnet to emulate the terminal specified by the identification string.


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