Identify the network plan
Record the gateway, subnet mask, DNS server, and allowed address range before changing any computer.
Overview
This guide introduces DHCP and static IPv4 settings used to connect laboratory computers to the same local network.
Step-by-step procedure
Use DHCP for normal workstations
Open the wired network settings and select automatic or DHCP addressing so the router assigns the settings.
Use static IP only when required
For devices such as servers or printers, enter a unique IP address within the correct subnet and outside the DHCP conflict range.
Enter gateway and DNS
Use the router address as the default gateway. Use the approved school or provider DNS addresses.
Reconnect the network
Disable and enable the network connection or unplug and reconnect the Ethernet cable.
Check the assigned address
Use the system network details or the terminal command ip addr to view the address. Use ip route to identify the default gateway.
Test the local network
Ping the gateway address. A reply confirms that the computer can reach the router.
Test internet and DNS
Ping a known public IP, then open a website. This separates internet connectivity problems from DNS problems.
Checks and reminders
- Every static IP must be unique. Duplicate addresses cause unstable connections.
- Computers must use the same subnet mask to communicate directly on the local network.
- Document fixed addresses assigned to routers, switches, printers, and servers.