how to reserve an IP address on a DHCP server

 how to reserve an IP address on a DHCP server

dhcp stands for Dynamic Host Configuration Protocol, a type of protocol for dynamically hosting configurations that assigns an IP address to each device on the network

Every device with an Internet connection requires an IP address. This address is assigned through a router with dhcp service

In very large networks, one router alone cannot manage all connected devices

In these cases, a dedicated server is placed on the network only to assign IP addresses to devices. In this case, the dhcp protocol is executed on the server instead of the router

dhcp not only assigns the IP address, but also manages the network configuration for the subnet mask, the default gateway, and the DNS service

dhcp automatically addresses clients. If we need to reserve the IP address for a specific client, this can be done by dhcp and using the client MAC Address. We use MAC Address because it is a physical and unique address for the client network card. The general definition of the reserved address in the dhcpd.conf file is as follows. faraznetwork is a custom name that appears in front of the host keyword

Then we need to restart the dhcpd service for the changes to take effect

service dhcpd restart

Of course, in distributions that use systemd, we use the following command

systemctl restart dhcpd.service