On the DHCP server, verify that the tftp-server package is installed with the command rpm -q tftp-server.

tftp is an xinetd-based service. Configure xinetd to process tftp requests by editing /etc/xinetd.d/tftp so that disable = no.

Start the tftp service with the following commands:

systemctl start xinetd.service
systemctl enable xinetd.service

These commands configure the tftp and xinetd services to immediately turn on and also configure them to start at boot.