Nortel Networks NN46110-602 manual Diagnosing WAN link problems

Chapter 4 Troubleshooting 79

Alternatively, on NT 4.0, Windows 98, and Windows 95, complete the following steps to change your workstation to be a member of a workgroup instead of a domain:

1From the Start menu, select Settings > Control Panel. In the Control Panel, double-click Network.

The Network Control Panel applet appears.

2Select the Identification tab. In Windows 95, you can modify the entries on the Identification tab; on NT 4.0, you must click Change to change the entries.

3Change to use a Workgroup and verify that the computer name does not match the entry on the remote network. The name for the workgroup is not important; you can enter anything.

4Click OK to save the changes and reboot the machine.

5When accessing a resource on the remote domain, if you are prompted for a user name and password, the domain name must precede the user ID. For example, if the user ID is JSmith and you are accessing a machine on the remote domain named CORP, enter your user name as CORP\JSmith.

Diagnosing WAN link problems

WAN link problems can occur between the VPN Router and the public data network (PDN) at three levels:

1T1/V.35 interface

2HDLC framing

3PPP layer

If a connectivity problem occurs with the WAN link, there are two approaches to diagnosing and correcting the problem.

•Start from the bottom to verify that physical connectivity exists, then make sure that the HDLC link is up, and finally examine the PPP status to see if it is passing IP packets back and forth.

Nortel VPN Router Troubleshooting