[Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_dhcp/configuration/12-4/dhcp-12-4-book/config-dhcp-client.html, If we want to get an IP address from the DHCP server on a Cisco device, we can use the command “ip address dhcp”., , Note: The command “ip helper-address” enables a router to become a DHCP Relay Agent., , , ]