The default configuration file should work for most people just fine. Here it is, in case you lose it.
You should read the dhcpcd.conf man page once installed and put your options into
# A sample configuration for dhcpcd. # See dhcpcd.conf(5) for details. # Inform the DHCP server of our hostname for DDNS. hostname # To share the DHCP lease across OSX and Windows a ClientID is needed. # Enabling this may get a different lease than the kernel DHCP client. # Some upstream DHCP servers may also require a ClientID, such as FRITZ!Box. #clientid # A list of options to request from the DHCP server. option domain_name_servers, domain_name, domain_search, host_name option classless_static_routes # Respect the network MTU. option interface_mtu # Most distributions have NTP support. #option ntp_servers # A ServerID is required by RFC2131. require dhcp_server_identifier