Nortel Networks NN46110-602 manual Solving connectivity problems

72 Chapter 4 Troubleshooting

Solving connectivity problems

This section lists many of the common connectivity problems that occur and their recommended solutions. Problems, and some typical client user responses that can help with diagnosis, are categorized as follows:

Modem and dial-up problems

“I cannot browse the Web or check my e-mail over my dial-up connection.”

“I cannot ping my ISP site.”

Extranet connection problems

“I can browse the Web over my dial-up connection, but I cannot log in to my network over the extranet connection.”

Problems with name resolution using DNS services

“I logged into my corporate network, but I get messages saying the host is unknown.”

“I can ping the host using its IP address, but not using its host name.”

Network browsing problems

“I cannot browse the corporate network.”

“I cannot print.”

“I cannot access the Internet over my extranet connection.”

Diagnosing client connectivity problems

A connection can fail at varying points in an extranet. If remote users have a problem accessing their corporate network and the source of the problem is unknown, Nortel recommends that they follow these steps to first determine whether the problem is with their modem, Point-to-Point Protocol (PPP) dial-up, or with the extranet connection:

NN46110-602