Applying DHCP on Workgroup Network

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Applying DHCP on Workgroup Network:

Dynamic host Configuration Protocol can be used to assign Automatic (Dynamic) IP Addresses to all computers in the network. But for this at least one computer must have windows server operating system installed and it must be configured as a DHCP server.


Steps:

1.    First DHCP must be installed on the Server. Open control panel  Add\Remove programs  select option Add\Remove windows components  from the list double click on networking services and select DHCP and click ok  next to install. (We will also require the server CD during installation)

2.    Then DHCP can be found in control panel administrative tools DHCP

3.    Open DHCP  right click on the computer name and select option New Scope.

4.    Click on Next and type a name for the DHCP scope and if necessary a description also.  Next

5.    Then enter the range of IP addresses to be assigned to computers. This should be set according to the no. of computers in our network. Ex: Start IP address = 192.168.0.1 and End IP address = 192.168.0.100. This will assign 100 automatic IP address to 100 clients.  Next.

6.    Then in the exclusion screen enter any IP address which might be being used and comes in the range. This is used to prevent duplicate IP addresses on the network.  Next.

7.    Then in the Lease Duration screen enter for how in days long a computer can use an automatic address. à Next.

NOTE: This can be set according to our requirement. After a computer has totally used its IP address for the specified no. of days it will need to renew its IP address by going to my network places à properties à right click on Local area connection and select repair.

8.    Then select option Yes, I want to configure these options now.  Next.

9.    Next the router (default gateway) screen will be displayed. If a ICS server is setup to share internet connections here type the IP address of the ICS server. Next  Next

10.Then select option Yes I want to activate these options now. Next   Finish

Troubleshooting a Network

The following sections list a series of common networking problems along with solutions that can usually set things right again.

Problem

We cannot ping any computers in the network.

Solution

In By default the Windows Firewall is enabled in windows and this should be disabled in a workgroup network or else computers might not be able to communicate.

Steps: 

1.Go to My Network Places Properties Local area Connection Properties 

2. In the Advanced Tab Click on settings select OFF to disable the Windows Firewall.

Problem

Duplicate computer names.

Solution

Make sure that every computer on the network has a unique name. Otherwise, you'll get an error message when you reboot the workstations with networking cables attached. (You can change the computer name from the System applet of the Control Panel, although you must restart the system for it to be effective.)

Problem

Different workgroup names.

Solution

Make sure every computer that's supposed to be working together has the same workgroup name. The Windows My Network Places icons display computers by workgroup name. 

Problem

Shared resources are not available.

Solution

Make sure that shared resources have been set for any servers on your. If you can't share a resource ensure that File and Printer Sharing has been installed.

Problem

All settings are correct but no computers are shown in My Network Places.

Solution

This can be because the security settings of the windows operating system has been set correctly. These settings need to be changed in order for the computers to be shown. Check these settings on all computers in the network.
Steps:-
1.    Open Control Panel  Administrative Tools  Local Security policy.
2.    Expand Local Policies.
3.    Select Security Options. Here set the following settings:
a.    Network Access: Allow anonymous SID/Name Translation  Enabled.
b.    Network Access: Do not allow anonymous enumeration of SAM accounts Disabled.
c.    Network Access: Sharing and Security model for local accounts. Classic.
4.    Then restart the computer. Now computers will be shown in My Network Places.

Problem

A user can't access any shared resources (but others can).

Solution

First, have the user log off and log back on. Next, check cable connections a loose or disconnected RJ-45 cable affects only the computer (or hub) using it. If a Category 5 UTP cable seems to be connected tightly but the user still can't get on the network, check the cable with a cable tester or replace the cable.

Problem
Blank Passwords don’t work
Solution

In a peer to peer network when we first access computers or shared folders we will be asked for a user name and password here we need to enter the remote computers user name and password to gain access. The user must have a password set because blank password don’t work in a workgroup network.

Problem

Message about duplicate IP addresses can't connect to anything.

Solution

Duplicate IP addresses disable TCP/IP networking.  Check the IP Addresses of all computers in the network. We need to make sure that a same IP Address is not assigned to nay computers in the network.

Problem

No error message can't connect to Internet or other computers.

Solution

Check the router, switch, or hub used to connect the computers to each other and the Internet. It needs to be powered, and the data cables must be properly connected between it and each computer.

If your network uses DHCP to dynamically assign IP addresses and the router has lost power or connection, users won't be able to get IP addresses. Restart the router, and have all users log off and shut down. When they restart their systems, they should be able to obtain valid IP addresses and connect with each other.



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