Check in all new configs on Phil.

etc/dhcpcd.conf

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+# See dhcpcd.conf(5) for details.
+
+# Allow users of this group to interact with dhcpcd via the control socket.
+controlgroup wheel
+
+# Inform the DHCP server of our hostname for DDNS.
+hostname
+
+# Use the hardware address of the interface for the Client ID.
+#clientid
+# or
+# Use the same DUID + IAID as set in DHCPv6 for DHCPv4 ClientID as per RFC4361.
+# Some non-RFC compliant DHCP servers do not reply with this set.
+# In this case, comment out duid and enable clientid above.
+duid
+
+# Persist interface configuration when dhcpcd exits.
+persistent
+
+# vendorclassid is set to blank to avoid sending the default of
+# dhcpcd-<version>:<os>:<machine>:<platform>
+vendorclassid
+
+# A list of options to request from the DHCP server.
+option domain_name_servers, domain_name, domain_search
+option classless_static_routes
+# Respect the network MTU. This is applied to DHCP routes.
+#option interface_mtu
+
+# Request a hostname from the network
+#option host_name
+
+# Most distributions have NTP support.
+#option ntp_servers
+
+# Rapid commit support.
+# Safe to enable by default because it requires the equivalent option set
+# on the server to actually work.
+option rapid_commit
+
+# A ServerID is required by RFC2131.
+require dhcp_server_identifier
+
+# Generate SLAAC address using the Hardware Address of the interface
+#slaac hwaddr
+# OR generate Stable Private IPv6 Addresses based from the DUID
+slaac private
+
+# Static IP for the interface
+interface enp12s0
+static ip_address=192.168.67.1
+static routers=192.168.67.254
+static domain_name_servers=192.168.67.254