3.7. Assigning a static address to a host by using DHCP

Procedure

1. If you are configuring an IPv4 network:

   1. Edit the /etc/kea/kea-dhcp4.conf file, and add a reservation to the subnet4 parameter:

      {
        "Dhcp4": {
          "subnet4": [
            {
              "subnet": "192.0.2.0/24",
      	...,
              "reservations": [
                {
                  "hw-address": "52:54:00:72:2f:6e",
                  "ip-address": "192.0.2.130"
                }
              ],
      	...

      This example configures Kea to always assign the 192.0.2.130 IP address to the host with the 52:54:00:72:2f:6e MAC address.

      For further examples, see the /usr/share/doc/kea/examples/kea4/reservations.json file provided by the kea-doc package.

   2. Verify the syntax of the configuration file:

      # kea-dhcp4 -t /etc/kea/kea-dhcp4.conf

      If the command returns Syntax check failed, fix the errors shown in the report.

   3. Restart the kea-dhcp4 service:

      # systemctl restart kea-dhcp4

2. If you are configuring an IPv6 network:

   1. Edit the /etc/kea/kea-dhcp6.conf file, and add a reservation to the subnet6 parameter:

      {
        "Dhcp6": {
          "subnet6": [
            {
              "subnet": "2001:db8:0:1::/64",
      	...,
              "reservations": [
                {
                  "hw-address": "52:54:00:72:2f:6e",
                  "ip-address": "2001:db8:0:1::99"
                }
              ];
      	...

      This example configures Kea to always assign the 2001:db8:0:1::99 IP address to the host with the 52:54:00:72:2f:6e MAC address.

      For further examples, see the /usr/share/doc/kea/examples/kea6/reservations.json file provided by the kea-doc package.

   2. Verify the syntax of the configuration file:

      # kea-dhcp6 -t /etc/kea/kea-dhcp6.conf

      If the command returns Syntax check failed, fix the errors shown in the report.

   3. Restart the kea-dhcp6 service:

      # systemctl restart kea-dhcp6