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Network Troubleshooting:
- Using ping command
For checking the communication between wireless nodes also, we can use ping command. If wireless LAN card drivers are properly installed and access point is powered on, but still we are receiving the message Network Unreachable, it means that we have network configuration problem. For this we can check the following:
- IP address: We should run ifconfig command to get the exact IP of the required computer.
- Computer name: If the ping by computer name is failing, we must check that our computer is able to resolve the desired computer name properly. For this we can check /etc/hosts file and update it, if required so.
- Defining gateway address
If the wireless computers on LAN are able to access each other but they are not able to communicate with the computers out side of LAN, then we must check that the gateway address is configured properly or not.
- Restart network service
We should always restart the network interface, after making some changes in it:
# service network restart
# service pcmcia restart
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