16 August 2010

How to solve network connectivity problems

How to solve  network connectivity problems ?

Network connectivity problems occur when one or more computers cannot communicate with other areas of the network. There are two levels of connectivity problems:
1:-           Loss of connectivity - When users cannot access areas of some part of network.
2:-           Timeout problems - Timeouts cause loss of connectivity, but are often associated with poor network performance.
Network connectivity problems have various causes but the most common causes for connectivity problems are:
(A)           Network adapters and switch ports have mismatching duplex levels or transfer speed settings.
(B)           Network adapters or switches with transmission rates of 10/100 megabits per second (Mbps) do not switch over correctly. Some autosense settings may not correctly detect the speed of some network adapters.
(C)          The network adapter is incompatible with the motherboard or other hardware or software components and drivers.
To troubleshoot network connectivity problems, follow these steps:
1.     Use the Ping  command-line tools to test basic connectivity
2.     Check the event logs for network-card-related entries or connectivity-related entries.
3.     Check whether the network adapter is on the supporting list of the Computer operating system.
4.     Check other computers that use the same default gateway that are plugged into the same hub or switch. If these computers do not experience network connectivity problems, the problem may be a faulty network adapter on one computer.
5.     Contact the vendor of each motherboard and update the BIOS of the boards to obtain the latest version.
6.     Check the network adapter and uplink hardware (hub or switch) for common settings. Make sure that all complementing network resources (network adapter, hub, and switch) are set to the same speed and duplex level.
7.     Manually set the network adapter of the computer that has connectivity problems to half-duplex and a lower speed.
8.     Swap the network cable between the failing system and the hub or switch.
9.     Replace the network adapter with a network adapter that has been tested and proven reliable. To do this, follow these steps:
1.     Remove the network adapter diagnostics program.
2.     Remove the network adapter in Network properties.
3.     Install the new network adapter.
We are sure after these steps you’re fix Network connectivity problem if you  are not  fix Network Connectivity Problems Contact JSM INFOTECH 9560949000, 8800335542

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