dhcp config

rt-mep/kea-dhcp4.conf

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+// /etc/kea/kea-dhcp4.conf
+// sudo systemctl restart kea-dhcp4-server
+{
+"Dhcp4": {
+    "interfaces-config": {
+        "interfaces": [ "eth1/10.100.2.1" ]
+        // "dhcp-socket-type": "udp"
+    },
+
+    "control-socket": {
+        "socket-type": "unix",
+        "socket-name": "/tmp/kea4-ctrl-socket"
+    },
+
+    "lease-database": {
+        // Memfile is the simplest and easiest backend to use. It's an in-memory
+        // C++ database that stores its state in CSV file.
+        "type": "memfile",
+        "lfc-interval": 3600
+    },
+
+    "expired-leases-processing": {
+        "reclaim-timer-wait-time": 10,
+        "flush-reclaimed-timer-wait-time": 25,
+        "hold-reclaimed-time": 3600,
+        "max-reclaim-leases": 100,
+        "max-reclaim-time": 250,
+        "unwarned-reclaim-cycles": 5
+    },
+
+    "renew-timer": 900,
+    "rebind-timer": 1800,
+    "valid-lifetime": 3600,
+
+    "option-data": [
+        {
+            "name": "domain-name-servers",
+            "data": "10.100.2.1, 1.1.1.1"
+        },
+
+        // "name": "domain-name" or "code": 15.
+        {
+            "code": 15,
+            "data": "enpls.org"
+        },
+
+        {
+            "name": "domain-search",
+            "data": "nl.x9.pm"
+        }
+    ],
+
+    "subnet4": [
+        {
+            "subnet": "10.100.2.0/24",
+            "pools": [ { "pool": "10.100.2.100 - 10.100.2.200" } ],
+            "option-data": [
+                {
+                    "name": "routers",
+                    "data": "10.100.2.1"
+                }
+            ],
+
+            // Kea offers host reservations mechanism. Kea supports reservations
+            // by several different types of identifiers: hw-address
+            // (hardware/MAC address of the client), duid (DUID inserted by the
+            // client), client-id (client identifier inserted by the client) and
+            // circuit-id (circuit identifier inserted by the relay agent).
+            //
+            // Kea also support flexible identifier (flex-id), which lets you
+            // specify an expression that is evaluated for each incoming packet.
+            // Resulting value is then used for as an identifier.
+            //
+            // Note that reservations are subnet-specific in Kea. This is
+            // different than ISC DHCP. Keep that in mind when migrating
+            // your configurations.
+            "reservations": [
+                // You can add more reservations here.
+            ]
+            // You can add more subnets there.
+        }
+    ],
+
+    // There are many, many more parameters that DHCPv4 server is able to use.
+    // They were not added here to not overwhelm people with too much
+    // information at once.
+
+    // Logging configuration starts here. Kea uses different loggers to log various
+    // activities. For details (e.g. names of loggers), see Chapter 18.
+    "loggers": [
+    {
+        // This section affects kea-dhcp4, which is the base logger for DHCPv4
+        // component. It tells DHCPv4 server to write all log messages (on
+        // severity INFO or more) to a file.
+        "name": "kea-dhcp4",
+        "output_options": [
+            {
+                // Specifies the output file. There are several special values
+                // supported:
+                // - stdout (prints on standard output)
+                // - stderr (prints on standard error)
+                // - syslog (logs to syslog)
+                // - syslog:name (logs to syslog using specified name)
+                // Any other value is considered a name of the file
+                "output": "/var/log/kea-dhcp4.log"
+
+                // Shorter log pattern suitable for use with systemd,
+                // avoids redundant information
+                // "pattern": "%-5p %m\n"
+
+                // This governs whether the log output is flushed to disk after
+                // every write.
+                // "flush": false,
+
+                // This specifies the maximum size of the file before it is
+                // rotated.
+                // "maxsize": 1048576,
+
+                // This specifies the maximum number of rotated files to keep.
+                // "maxver": 8
+            }
+        ],
+        // This specifies the severity of log messages to keep. Supported values
+        // are: FATAL, ERROR, WARN, INFO, DEBUG
+        "severity": "INFO",
+
+        // If DEBUG level is specified, this value is used. 0 is least verbose,
+        // 99 is most verbose. Be cautious, Kea can generate lots and lots
+        // of logs if told to do so.
+        "debuglevel": 0
+    }
+  ]
+}
+}