One of the first and most basic steps in the Layer 3 troubleshooting process is verifying the IP address and other associated parameters of the local interfaces. Depending on the platform you are using, two commands will take care of this operation:
- Windows: ipconfig
- Linux: ifconfig
To further troubleshoot any type of connection issue, you must know the devices’ IP address, subnet mask, and gateway. For example, if you want to perform a connectivity test using the ping command to a destination device but you do not know the IP address of that device . . .
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