LAN Connection

The host which does not get connect may have the same ip address of another host in the network

Because th IP is conficlt to your Lan network thats why its not communicate each other...

No connectivity will concer with both Physical & logical problems.
Just check will it properly connected via Cables, Connector & lan Cards.
Then check is it in same subnet (TCP/IP configruration) & workgroup.

Here are some tips

check LAN card driver its proper install or not

check LAN card its enable or disable (always enable)

check IP address, subnet mask, machine name and work group

check LAN security in O/S firewall its stated on higher you change lower
status.

check LAN cable, IO port and switch/hub port

check BIOS setting - LAN card enable or disable (always enable)

All parts and settings checked ok, ping another machine in network its
replayed or not,

Check your machine and network for virus with updated antivirus.

Following are the troubleshooting steps that could be tried

1) Check the
IP first (Start --> Run --> cmd --> ipconfig).

If you get Windows IP configuration message after entering ipconfig,

check for the network adapter status in device manager (Start --> run --> devgmgmt.msc).

2)
Ping 4.2.2.2 ( 4.2.2.2 which is a Public DNS Server) if you get replies DNS resolution  is not the problem.


If it fails try ipconfig/flushdns and then ipconfig/registerdns.

3) Ping www.anywebsite.com --> If it times-out, try netsh winsock reset catalog,
Reboot the pc.

4) If the above steps do not work you will need to uninstall and reinstall the TCP/IP stack.

Sometimes the problem persists in the Type of Cable. 

There can be more than one reason for the host not connecting to the network.

Check the following:-

1. Network adapter drivers (remove the driver and reinstall)
2. UTP cable from the switch/IO box (must be a straight cable)
3. RJ-45 Pins perfectly crimped at both the ends of the cable
4. Auto-negotiation of the speed between the switch and the ethernet card (10/100/1000).
5. DHCP client service (must be enabled and set to automatic to get the IP lease) if there is a DHCP server for the LAN
6. If there is no DHCP server, check Static IP Address and gateway
7. Some cases viruses and worms take control on the TCP/IP functionality. such cases scan the computer with latest AV signatures and remove the infection
 
Most of the cases can be solved checking the above 7 possiblities.

  

Hi,

If one host in LAN does not connect to LAN check if the

1)Domain Name is entered correctly as it is case sensitive .
2)Check If Lan Card is working properly.
3)Check if the cable is clamped properly.
4)Check if the hub or switch is working properly.

To check if the Lan Card is working properly ping 127.0.0.1 if the ping request is successful then the Lan Card is working properly.Likewise check for other listings.