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Troubleshooting techniques

I have a three PC LAN connected using 3COM 3C410 phoneline network cards and running on Windows Me. These PCs share an Internet connection using Enternet 300 software, an ADSL modem and a 3COM 3C905B TX Ethernet card. IE works fine in the host computer, however in the client computer it works only in FTP protocol. When I try HTTP, IE is not able to receive any data except from the ISP's own Web page. How do I fix this problem?

Older versions of Enternet 300 are not compatible with Windows Me because of changes in the operating system. Make sure that you have installed the latest version of Enternet 300 on your system. You can also face this problem if your Internet Explorer is not configured to use Enternet.

Check the following link to find information on configuring Internet Explorer to use Enternet:

I am running a Windows 2000 Advanced Server with Windows 98/Windows Me on the clients and a DHCP server for IP polling. While logging, some of the clients show an error message saying "No domain server found to validate your password". If I press cancel it logs in.

In Windows 98 and Windows Me, if you log on by canceling the password, you will not be validated by the domain server and hence will not be able to access the network resources.

Make sure that you log in properly by providing the correct login, password and the Domain server. Also make sure that all the clients are connected to a single domain.

How can I have share network resources like files and printers in a LAN having both Windows and Linux machines?

Samba is a protocol by which PCs on a heterogeneous network can share various network resources. Windows NT, OS/2, and Linux support Samba and various add-on packages that achieve the same thing are available for DOS, Windows, VMS and all flavors of Unix. You need to install and configure Samba protocol for providing interface between Windows and Linux machines.

Visit the following link for detail information about the Samba:

I have a UTP network with 4 meter crossover UTP cable. After installing a new 12 meter crossover UTP cable, the network speed has slowed down by 80 percent.

The slowdown may be due to poor network performance within a segment of your network or across the entire network. This may occur occasionally, during times of high usage. The causes can be found out using a network monitor that will help in determining the level of bandwidth being used across the network at the time of peak usage, and the types of packets being transmitted.

We suggest that you can do the following to solve this problem:

1. Check the cabling. Some cable connection might be loose.

2. Configure the Network Interface Cards (NIC) properly.

3. Check for high numbers of packets from one IP address. A malfunctioning network adapter card could be "chattering" and sending lots of unnecessary packets.

4. Check to see whether any new applications have been installed on the network. Perhaps a client/server application is generating lot of packet traffic.

5. Network speed also depends on the number of users currently working. The network congestion increases as the number of users increase in a network.

Check out these links for more information:;EN-US;q148942

What is the command in Windows NT for releasing and listing IP Address of NIC?

ipconfig is a utility used from the command prompt to display the network settings assigned and given by a network. This command can be utilized to verify a

network connection as well as to verify your network settings.

To release an IP Address use the following command:

ipconfig /release

This command releases the current DHCP configuration. This option disables TCP/IP on the local system and is available only on DHCP clients. To specify an adapter name, type the adapter name that appears when you use ipconfig without parameters.

To display information about the IP address, use the following command:

ipconfig /all

This command produces a full display. Without the switch /all, ipconfig displays only the IP address,

subnet mask, and default gateway values for each network card.

What are the transfer rates for ARCNET, Ethernet, Token Ring and FDDI?

ARCNET: The maximum transmission speed is 10 Mbps. ARCNET (COM20019/20/22) allows you to select the rate from 156 Kbps to 10 Mbps.

Ethernet: 10BaseT is the most common Ethernet system and it provides transmission speeds up to 10 Mbps. Fast Ethernet or 100BaseT provides transmission speeds up to 100 Mbps.

FDDI: An FDDI network contains two token rings, one for possible backup in case the primary ring fails. The primary ring offers up to 100 Mbps capacity. If the secondary ring is not needed for backup, primary can run at 200 Mbps.

Token Ring: The IEEE 802.5 token ring technology provides for data transfer rates of either 4 or 16 Mbps.

How does one change the DNS (Domain Name Server) information for a site?

To modify the DNS information you will have to come under any of the categories given below:

1. You should have registered directly from a Domain Name registrar (Ex: Network Solutions or and have a Domain Management account with them.

a. If you have one, then visit your registrar's website and log into your management account.

b. Click on Modify DNS settings link and remove the existing DNS information first. Now enter the new DNS information.

2. If you have registered through a Web hosting provider, then please contact the hosting administrator to change the current DNS.

Please provide a step-by-step procedure on recovering the password in a Cisco Catalyst 1900 Series Switch?

Check the boot firmware version number from the Systems Engineering menu. To access the Systems Engineering menu, follow the procedure below:

1. Disconnect the power cord from the rear panel.
2. Press and hold the Mode button on the front panel.
3. Power-cycle the switch.
4. Release the Mode button one or two seconds after the LED above port 1x goes off. You will see the following Diagnostic Console screen:
Ethernet Address: 00-E0-1E-7E-B4-40
Press Enter to continue.
5. Press Enter to display the Diagnostic Console - Systems Engineering menu. You will see the following Systems Engineering menu:

Diagnostic Console - Systems Engineering
Operation firmware version: 8.00.00 Status: valid
Boot firmware version: 3.02
[C] Continue with standard system start up
[U] Upgrade operation firmware (XMODEM)
[S] System Debug Interface
Enter Selection:

6. The bold letters above show the Boot firmware version.
Clearing the Password
Power-cycle the switch.
After POST completes, the following prompt displays:
Do you wish to clear the passwords? [Y]es or [N]o:

Note: You have ten seconds to respond. If you don't respond within that time, the Management Console Logon screen displays. You cannot change this waiting period.

Enter [Y]es to delete the existing password from Non-volatile RAM (NVRAM).

Note: If you type [N]o, the existing password remains valid.

Assign a password from the switch management interfaces (Management console or Command Line Interface (CLI)). Viewing the Password for firmware versions between 1.10 and 3.02, you can view the password you are trying to recover.

Access the diagnostic console, Press and hold the Mode button, Power-cycle the switch and release the Mode button one or two seconds after the LED above port 1x goes off.

You will see the following logon screen:
Cisco Systems Diagnostic Console
Copyright(c) Cisco Systems, Inc. 1999
All rights reserved.
Ethernet Address: 00-E0-1E-7E-B4-40
Press Enter to continue.

Press Enter and select the [S] option on the Diagnostic Console, and then select the [V] option for System Debug Interface menu to display the management console password. If you want to change the password, select the [M] option on the Console Settings menu. Contact the Cisco TAC for the factory-installed password. Provide the serial number and/or Media Access Control (MAC) address of the switch. The serial number is usually located on the back of the unit. To obtain the MAC address, remove the cover and read the Ethernet address of the Programmable Read-Only Memory (PROM).

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