Nortel Networks NN46110-602 Network browsing problems, Cannot browse the network with NetBEUI

Chapter 4 Troubleshooting 77

Action: Validate that the VPN Client is configured with a DNS entry. For Windows NT 4.0, open a command prompt and enter ipconfig/all. Verify that a DNS server entry is listed. For Windows 95, from the Start menu on the task bar, select Run and enter winipcfg. Select Nortel VPN Router Extranet Access Adapter from the list of adapters and click More Info. Record the information displayed under the DNS Server entry and verify it with the network administrator.

Cause: The hostname being resolved has both a public and a private IP address, commonly referred to as a split-horizon DNS.

Action: Open a command prompt and ping the host you are trying to reach with a fully qualified host name (for example, www.nortel.com). If you receive a response, verify that the IP address returned on the first line (for example, www.nortel.com [207.87.31.127]) is an IP address from the remote corporate network. If it is not, notify your network administrator that you need to modify the internal hostname so that it is not the same as the external hostname.

Cause: The retail release of Windows 95 contained a bug that prevented use of more than one DNS server. This problem was fixed in OS Release 2.

Action: If you are using a release earlier than OS Release 2 of Windows 95, a patch is available from Microsoft to upgrade the winsock.dll. This patch is downloadable from www.microsoft.com.

Network browsing problems

Cannot browse the network (with NetBEUI)

Cause: For both PPTP and IPsec, the VPN Router does not currently support the NetBEUI protocol.

Action: To browse resources on a remote domain through a connection to a VPN Router, it is necessary to remove the NetBEUI protocol and to have a WINS server configured. By removing NetBEUI, the Microsoft Client uses NetBIOS over TCP/IP to browse network resources. This applies to both the PPTP dial-up client provided by Microsoft and the VPN Client provided by Nortel.

Nortel VPN Router Troubleshooting