[#2474] added unittests which load and validate example files

25 files changed, 107 insertions, 104 deletions

diff --git a/doc/examples/kea6/advanced.json b/doc/examples/kea6/advanced.json
index 5d85adf41c..7704f8df2b 100644
--- a/doc/examples/kea6/advanced.json
+++ b/doc/examples/kea6/advanced.json
@@ -2,7 +2,7 @@
 // It attempts to showcase some of the more advanced features.
 // Topology wise, it's a basic scenario with one IPv6 subnet configured.
 // It is assumed that one subnet (2001:db8:1::/64) is available directly
-// over ethX interface.
+// over eth0 interface.
 //
 // The following features are currently showcased here:
 // 1. Configuration of MAC/hardware address sources in DHCPv6
@@ -14,9 +14,9 @@
 { "Dhcp6":
 
 {
-    // Kea is told to listen on ethX network interface only.
+    // Kea is told to listen on eth0 network interface only.
     "interfaces-config": {
-        "interfaces": [ "ethX" ],
+        "interfaces": [ "eth0" ],
 
         // This makes interfaces to be re-detected at each (re-)configuration.
         // By default it is true.
@@ -132,8 +132,8 @@
             "prefix": "2001:db8:abcd::",
             "prefix-len": 48,
             "delegated-len": 64,
-            "excluded-prefix": "2001:db8:abcd:1234::",
-            "excluded-prefix-len": 72,
+            "excluded-prefix": "2001:db8:abcd:0:1234::",
+            "excluded-prefix-len": 80,
 
             // Another user-context for this PD pool. Again, you can put
             // anything you want in there as long as it's valid JSON and
@@ -145,7 +145,7 @@
         ], // end of pools
 
         "subnet": "2001:db8:1::/64",
-        "interface": "ethX",
+        "interface": "eth0",
 
         // Sometimes the relay may use an odd IPv6 address that's not matching
         // the subnet. This is discouraged, but there are valid cases when it
diff --git a/doc/examples/kea6/all-keys-netconf.json b/doc/examples/kea6/all-keys-netconf.json
index 6712be2e11..cce7e8ec37 100644
--- a/doc/examples/kea6/all-keys-netconf.json
+++ b/doc/examples/kea6/all-keys-netconf.json
@@ -258,13 +258,13 @@
         "hosts-databases": [
             {
                 // Name of the database to connect to.
-                "name": "kea",
+                "name": "keatest",
 
                 // Host on which the database resides.
                 "host": "localhost",
 
                 // Database password.
-                "password": "kea",
+                "password": "keatest",
 
                 // Port on which the database is available.
                 "port": 3306,
@@ -273,7 +273,7 @@
                 "type": "mysql",
 
                 // User name to be used to access the database.
-                "user": "kea",
+                "user": "keatest",
 
                 // Read only mode.
                 "readonly": false,
@@ -293,13 +293,13 @@
             },
             {
                 // Name of the database to connect to.
-                "name": "kea",
+                "name": "keatest",
 
                 // Host on which the database resides.
                 "host": "localhost",
 
                 // Database password.
-                "password": "kea",
+                "password": "keatest",
 
                 // Port on which the database is available.
                 "port": 5432,
@@ -308,7 +308,7 @@
                 "type": "postgresql",
 
                 // User name to be used to access the database.
-                "user": "kea",
+                "user": "keatest",
 
                 // Connection reconnect wait time.
                 // This parameter governs how long Kea waits before attempting
@@ -349,7 +349,7 @@
             // Specifies a list of interfaces on which the Kea DHCPv6
             // server should listen to the DHCP requests.
             "interfaces": [
-                "ethX"
+                "eth0"
             ],
 
             // Boolean flag indicating if the available interfaces should
@@ -645,7 +645,7 @@
 
                 // Specifies that this shared network is selected for the
                 // requests received on the particular interface.
-                "interface": "ethX",
+                "interface": "eth0",
 
                 // Specifies the content of the interface-id option used
                 // by relays to identify the interface on the relay to
@@ -771,7 +771,7 @@
 
                         // Specifies that this subnet is selected for the requests
                         // received on the particular interface.
-                        "interface": "ethX",
+                        "interface": "eth0",
 
                         // Specifies the content of the interface-id option used
                         // by relays to identify the interface on the relay to
diff --git a/doc/examples/kea6/all-keys.json b/doc/examples/kea6/all-keys.json
index c3437d0424..c9e251210d 100644
--- a/doc/examples/kea6/all-keys.json
+++ b/doc/examples/kea6/all-keys.json
@@ -258,13 +258,13 @@
         "hosts-databases": [
             {
                 // Name of the database to connect to.
-                "name": "kea",
+                "name": "keatest",
 
                 // Host on which the database resides.
                 "host": "localhost",
 
                 // Database password.
-                "password": "kea",
+                "password": "keatest",
 
                 // Port on which the database is available.
                 "port": 3306,
@@ -273,7 +273,7 @@
                 "type": "mysql",
 
                 // User name to be used to access the database.
-                "user": "kea",
+                "user": "keatest",
 
                 // Read only mode.
                 "readonly": false,
@@ -293,13 +293,13 @@
             },
             {
                 // Name of the database to connect to.
-                "name": "kea",
+                "name": "keatest",
 
                 // Host on which the database resides.
                 "host": "localhost",
 
                 // Database password.
-                "password": "kea",
+                "password": "keatest",
 
                 // Port on which the database is available.
                 "port": 5432,
@@ -308,11 +308,14 @@
                 "type": "postgresql",
 
                 // User name to be used to access the database.
-                "user": "kea"
+                "user": "keatest"
             },
             {
+                // Name of the database to connect to.
+                "name": "keatest",
+
                 // Database password.
-                "password": "kea",
+                "password": "keatest",
 
                 // Port on which the database is available.
                 "port": 9042,
@@ -321,7 +324,7 @@
                 "type": "mysql",
 
                 // User name to be used to access the database.
-                "user": "kea",
+                "user": "keatest",
 
                 // Connection reconnect wait time.
                 // This parameter governs how long Kea waits before attempting
@@ -362,7 +365,7 @@
             // Specifies a list of interfaces on which the Kea DHCPv6
             // server should listen to the DHCP requests.
             "interfaces": [
-                "ethX"
+                "eth0"
             ],
 
             // Boolean flag indicating if the available interfaces should
@@ -658,7 +661,7 @@
 
                 // Specifies that this shared network is selected for the
                 // requests received on the particular interface.
-                "interface": "ethX",
+                "interface": "eth0",
 
                 // Specifies the content of the interface-id option used
                 // by relays to identify the interface on the relay to
@@ -784,7 +787,7 @@
 
                         // Specifies that this subnet is selected for the requests
                         // received on the particular interface.
-                        "interface": "ethX",
+                        "interface": "eth0",
 
                         // Specifies the content of the interface-id option used
                         // by relays to identify the interface on the relay to
diff --git a/doc/examples/kea6/backends.json b/doc/examples/kea6/backends.json
index 148a5834a4..7e16244877 100644
--- a/doc/examples/kea6/backends.json
+++ b/doc/examples/kea6/backends.json
@@ -8,9 +8,9 @@
 { "Dhcp6":
 
 {
-// Kea is told to listen on ethX interface only.
+// Kea is told to listen on eth0 interface only.
   "interfaces-config": {
-    "interfaces": [ "ethX" ]
+    "interfaces": [ "eth0" ]
   },
 
 // We need to specify lease type. Exactly one lease-database section
@@ -82,7 +82,7 @@
     {
       "pools": [ { "pool": "2001:db8:1::/80" } ],
       "subnet": "2001:db8:1::/64",
-      "interface": "ethX"
+      "interface": "eth0"
     }
   ],
 
diff --git a/doc/examples/kea6/classify.json b/doc/examples/kea6/classify.json
index 47e1e37ee8..a5fc2e98a0 100644
--- a/doc/examples/kea6/classify.json
+++ b/doc/examples/kea6/classify.json
@@ -4,9 +4,9 @@
 { "Dhcp6":
 
 {
-// Kea is told to listen on ethX interface only.
+// Kea is told to listen on eth0 interface only.
   "interfaces-config": {
-    "interfaces": [ "ethX" ]
+    "interfaces": [ "eth0" ]
   },
 
 // Let's use the simplest backend: memfile and use some reasonable values
@@ -24,10 +24,10 @@
 // One packet can belong to zero or more classes.
   "client-classes": [
 
-// The first class attempts to match all packets coming in on ethX interface.
+// The first class attempts to match all packets coming in on eth0 interface.
   {
       "name": "lab",
-      "test": "pkt.iface == 'ethX'",
+      "test": "pkt.iface == 'eth0'",
       "option-data": [{
           "name": "dns-servers",
           "data": "2001:db8::1"
@@ -59,7 +59,7 @@
         "pools": [ { "pool": "2001:db8:1::/80" } ],
         "subnet": "2001:db8:1::/64",
         "client-class": "cable-modems",
-        "interface": "ethX"
+        "interface": "eth0"
     },
 
     // The following subnet contains a class reservation for a client using
@@ -73,7 +73,7 @@
             "duid": "01:02:03:04:05:0A:0B:0C:0D:0E",
             "client-classes": [ "cable-modems" ]
         } ],
-        "interface": "ethX"
+        "interface": "eth0"
     },
 
     // The following subnet contains a pool with a class constraint: only
@@ -81,11 +81,11 @@
     {
         "pools": [
            {
-               "pool": "2001:db8:3::/80",
+               "pool": "2001:db8:4::/80",
                "client-class": "cable-modems"
            } ],
          "subnet": "2001:db8:4::/64",
-         "interface": "ethY"
+         "interface": "eth1"
     }
 
   ],
diff --git a/doc/examples/kea6/classify2.json b/doc/examples/kea6/classify2.json
index be3a071afd..474c3932b1 100644
--- a/doc/examples/kea6/classify2.json
+++ b/doc/examples/kea6/classify2.json
@@ -4,9 +4,9 @@
 { "Dhcp6":
 
 {
-// Kea is told to listen on ethX interface only.
+// Kea is told to listen on eth0 interface only.
   "interfaces-config": {
-    "interfaces": [ "ethX" ]
+    "interfaces": [ "eth0" ]
   },
 
 // Let's use the simplest backend: memfile and use some reasonable values
@@ -70,7 +70,7 @@
         "pools": [ { "pool": "2001:db8:1::/80" } ],
         "subnet": "2001:db8:1::/64",
         "client-class": "cable-modems",
-        "interface": "ethX"
+        "interface": "eth0"
     },
 // The following subnet contains a class reservation for a client using
 // DUID 01:02:03:04:05:0A:0B:0C:0D:0E. This client will always be assigned
@@ -83,7 +83,7 @@
             "duid": "01:02:03:04:05:0A:0B:0C:0D:0E",
             "client-classes": [ "cable-modems" ]
         } ],
-        "interface": "ethX",
+        "interface": "eth0",
         "require-client-classes": [ "second_subnet" ]
     },
 // The following subnet contains a pool with a class constraint: only
@@ -91,19 +91,19 @@
     {
         "pools": [
            {
-               "pool": "2001:db8:3::/80",
+               "pool": "2001:db8:4::/80",
                "client-class": "cable-modems"
            } ],
          "subnet": "2001:db8:4::/64",
-         "interface": "ethY"
+         "interface": "eth1"
     },
 // This subnet is divided in two pools for unknown and known
 // (i.e. which have a reservation) clients. The built-in KNOWN and
 // UNKNOWN classes are set or not at host reservation lookup (KNOWN if
 // this returns something, UNKNOWN if this finds nothing) and client
-//classes depending on it are evaluated.
+// classes depending on it are evaluated.
 // This happens after subnet selection and before address allocation
-//from pools.
+// from pools.
     {
         "pools": [
             {
diff --git a/doc/examples/kea6/config-backend.json b/doc/examples/kea6/config-backend.json
index 815fe582f7..eca306d924 100644
--- a/doc/examples/kea6/config-backend.json
+++ b/doc/examples/kea6/config-backend.json
@@ -11,9 +11,9 @@
     // either "all" or "server2" will be used by this instance.
     "server-tag": "server2",
 
-    // Kea is told to listen on ethX interface only.
+    // Kea is told to listen on eth0 interface only.
     "interfaces-config": {
-        "interfaces": [ "ethX" ]
+        "interfaces": [ "eth0" ]
     },
 
     // Use memfile lease database backend.
diff --git a/doc/examples/kea6/dhcpv4-over-dhcpv6.json b/doc/examples/kea6/dhcpv4-over-dhcpv6.json
index c2e6ad3dfb..68d5675323 100644
--- a/doc/examples/kea6/dhcpv4-over-dhcpv6.json
+++ b/doc/examples/kea6/dhcpv4-over-dhcpv6.json
@@ -8,7 +8,7 @@
 {
   "interfaces-config": {
 // Enable unicast
-    "interfaces": [ "eno33554984/2001:db8:1:1::1" ]
+    "interfaces": [ "eth0/2001:db8:1::1" ]
   },
 
   "lease-database": {
@@ -23,7 +23,7 @@
 
   "subnet6": [
    {   "subnet": "2001:db8:1:1::/64",
-       "interface": "eno33554984",
+       "interface": "eth0",
        "pools": [ { "pool": "2001:db8:1:1::1:0/112" } ] }
    ],
 
diff --git a/doc/examples/kea6/duid.json b/doc/examples/kea6/duid.json
index 5265606a42..0c00c74e94 100644
--- a/doc/examples/kea6/duid.json
+++ b/doc/examples/kea6/duid.json
@@ -25,9 +25,9 @@
     "htype": 1
   },
 
-// Kea is told to listen on ethX interface only.
+// Kea is told to listen on eth0 interface only.
   "interfaces-config": {
-    "interfaces": [ "ethX" ]
+    "interfaces": [ "eth0" ]
   },
 
 // We need to specify the database used to store leases. As of
@@ -56,7 +56,7 @@
     {
       "pools": [ { "pool": "2001:db8:1::/80" } ],
       "subnet": "2001:db8:1::/64",
-      "interface": "ethX"
+      "interface": "eth0"
     }
   ],
 
diff --git a/doc/examples/kea6/global-reservations.json b/doc/examples/kea6/global-reservations.json
index db99beb48e..872a0e2ce5 100644
--- a/doc/examples/kea6/global-reservations.json
+++ b/doc/examples/kea6/global-reservations.json
@@ -9,9 +9,9 @@
 { "Dhcp6":
 
 {
-// Kea is told to listen on ethX interface only.
+// Kea is told to listen on eth0 interface only.
   "interfaces-config": {
-    "interfaces": [ "ethX" ]
+    "interfaces": [ "eth0" ]
   },
 
 // We need to specify the database used to store leases. As of
@@ -148,7 +148,7 @@
                     "delegated-len": 64
                 }
             ],
-            "interface": "ethX"
+            "interface": "eth0"
         }
     ],
 
diff --git a/doc/examples/kea6/ha-hot-standby.json b/doc/examples/kea6/ha-hot-standby.json
index 9675e6f7d5..a0752d5e4d 100644
--- a/doc/examples/kea6/ha-hot-standby.json
+++ b/doc/examples/kea6/ha-hot-standby.json
@@ -10,9 +10,9 @@
 { "Dhcp6":
 
 {
-// Kea is told to listen on ethX interface only.
+// Kea is told to listen on eth0 interface only.
     "interfaces-config": {
-        "interfaces": [ "ethX" ]
+        "interfaces": [ "eth0" ]
     },
 
     // Control socket is required for communication between the Control
@@ -113,7 +113,7 @@
                 }
              ],
 
-             "interface": "ethX"
+             "interface": "eth0"
     }
   ],
 
diff --git a/doc/examples/kea6/hooks.json b/doc/examples/kea6/hooks.json
index a930e2e9ba..60fc898235 100644
--- a/doc/examples/kea6/hooks.json
+++ b/doc/examples/kea6/hooks.json
@@ -5,9 +5,9 @@
 {"Dhcp6":
 
 {
-// Kea is told to listen on the ethX interface only.
+// Kea is told to listen on the eth0 interface only.
   "interfaces-config": {
-    "interfaces": [ "ethX" ]
+    "interfaces": [ "eth0" ]
   },
 
 // Set up the storage for leases.
@@ -30,7 +30,7 @@
           "user-context": { "charging": true }
         } ],
       "subnet": "2001:db8:1::/64",
-      "interface": "ethX"
+      "interface": "eth0"
     }
   ],
 
diff --git a/doc/examples/kea6/iPXE.json b/doc/examples/kea6/iPXE.json
index 9d38c4c4e0..601ad6f824 100644
--- a/doc/examples/kea6/iPXE.json
+++ b/doc/examples/kea6/iPXE.json
@@ -5,7 +5,7 @@
    // Mandatory part of the config that list interfaces on which
    // Kea will listen for incoming traffic.
       "interfaces-config": {
-         "interfaces": [ "ethX" ]
+         "interfaces": [ "eth0" ]
       },
 
 // Two classes are migrated form ISC-DHCP example:
diff --git a/doc/examples/kea6/leases-expiration.json b/doc/examples/kea6/leases-expiration.json
index a20d5e126f..5a3eeb4290 100644
--- a/doc/examples/kea6/leases-expiration.json
+++ b/doc/examples/kea6/leases-expiration.json
@@ -5,9 +5,9 @@
 { "Dhcp6":
 
 {
-// Kea is told to listen on ethX interface only.
+// Kea is told to listen on eth0 interface only.
   "interfaces-config": {
-    "interfaces": [ "ethX" ]
+    "interfaces": [ "eth0" ]
   },
 
 // We need to specify the database used to store leases. As of
@@ -57,7 +57,7 @@
     {
       "pools": [ { "pool": "2001:db8:1::/80" } ],
       "subnet": "2001:db8:1::/64",
-      "interface": "ethX"
+      "interface": "eth0"
     }
   ],
 
diff --git a/doc/examples/kea6/multiple-options.json b/doc/examples/kea6/multiple-options.json
index a22559e67f..b6d8be857c 100644
--- a/doc/examples/kea6/multiple-options.json
+++ b/doc/examples/kea6/multiple-options.json
@@ -4,9 +4,9 @@
 { "Dhcp6":
 
 {
-// Kea is told to listen on ethX interface only.
+// Kea is told to listen on eth0 interface only.
   "interfaces-config": {
-    "interfaces": [ "ethX" ]
+    "interfaces": [ "eth0" ]
   },
 
 // We need to specify the database used to store leases. As of
@@ -159,7 +159,7 @@
          }
       ],
       "subnet": "2001:db8:1::/64",
-      "interface": "ethX"
+      "interface": "eth0"
     }
   ],
 
diff --git a/doc/examples/kea6/mysql-reservations.json b/doc/examples/kea6/mysql-reservations.json
index 0553dad2e5..769c111a71 100644
--- a/doc/examples/kea6/mysql-reservations.json
+++ b/doc/examples/kea6/mysql-reservations.json
@@ -5,9 +5,9 @@
 { "Dhcp6":
 
 {
-// Kea is told to listen on ethX interface only.
+// Kea is told to listen on eth0 interface only.
   "interfaces-config": {
-    "interfaces": [ "ethX" ]
+    "interfaces": [ "eth0" ]
   },
 
 // We need to specify the database used to store leases. As of
@@ -46,9 +46,9 @@
     "type": "mysql",
     "reconnect-wait-time": 3000, // expressed in ms
     "max-reconnect-tries": 3,
-    "name": "kea",
-    "user": "kea",
-    "password": "kea",
+    "name": "keatest",
+    "user": "keatest",
+    "password": "keatest",
     "host": "localhost",
     "port": 3306,
     "readonly": true,
@@ -76,7 +76,7 @@
               "delegated-len": 64
           }
       ],
-      "interface": "ethX",
+      "interface": "eth0",
       "id": 1
     }
   ],
diff --git a/doc/examples/kea6/pgsql-reservations.json b/doc/examples/kea6/pgsql-reservations.json
index e27d4d5157..c7e204c390 100644
--- a/doc/examples/kea6/pgsql-reservations.json
+++ b/doc/examples/kea6/pgsql-reservations.json
@@ -5,9 +5,9 @@
 { "Dhcp6":
 
 {
-// Kea is told to listen on ethX interface only.
+// Kea is told to listen on eth0 interface only.
   "interfaces-config": {
-    "interfaces": [ "ethX" ]
+    "interfaces": [ "eth0" ]
   },
 
 // We need to specify the database used to store leases. As of
@@ -48,9 +48,9 @@
        "type": "postgresql",
        "reconnect-wait-time": 3000, // expressed in ms
        "max-reconnect-tries": 3,
-       "name": "kea",
-       "user": "kea",
-       "password": "kea",
+       "name": "keatest",
+       "user": "keatest",
+       "password": "keatest",
        "host": "localhost"
     }
   ],
@@ -73,7 +73,7 @@
               "delegated-len": 64
           }
       ],
-      "interface": "ethX",
+      "interface": "eth0",
       "id": 1
     }
   ],
diff --git a/doc/examples/kea6/reservations.json b/doc/examples/kea6/reservations.json
index 252b5410b5..f18ba62961 100644
--- a/doc/examples/kea6/reservations.json
+++ b/doc/examples/kea6/reservations.json
@@ -1,15 +1,15 @@
 // This is an example configuration file for DHCPv6 server in Kea
 // that showcases how to do host reservations. It is
 // assumed that one subnet (2001:db8:1::/64) is available directly
-// over ethX interface. A number of hosts have various combinations
+// over eth0 interface. A number of hosts have various combinations
 // of addresses and prefixes reserved for them.
 
 { "Dhcp6":
 
 {
-// Kea is told to listen on ethX interface only.
+// Kea is told to listen on eth0 interface only.
   "interfaces-config": {
-    "interfaces": [ "ethX" ]
+    "interfaces": [ "eth0" ]
   },
 
 // We need to specify the database used to store leases. As of
@@ -74,7 +74,7 @@
               "delegated-len": 64
           }
         ],
-        "interface": "ethX",
+        "interface": "eth0",
 
 // Host reservations. Define several reservations, note that
 // they are all within the range of the pool of the dynamically
diff --git a/doc/examples/kea6/several-subnets.json b/doc/examples/kea6/several-subnets.json
index 5891836f35..78bb066b80 100644
--- a/doc/examples/kea6/several-subnets.json
+++ b/doc/examples/kea6/several-subnets.json
@@ -5,9 +5,9 @@
 { "Dhcp6":
 
 {
-// Kea is told to listen on ethX interface only.
+// Kea is told to listen on eth0 interface only.
   "interfaces-config": {
-    "interfaces": [ "ethX" ]
+    "interfaces": [ "eth0" ]
   },
 
 // We need to specify the database used to store leases. As of
diff --git a/doc/examples/kea6/shared-network.json b/doc/examples/kea6/shared-network.json
index 0dd5edc593..5666e014a5 100644
--- a/doc/examples/kea6/shared-network.json
+++ b/doc/examples/kea6/shared-network.json
@@ -8,9 +8,9 @@
 // initial proposal was not best and way to migrate to something else.
 {
     "Dhcp6": {
-        // Kea is told to listen on ethX interface only.
+        // Kea is told to listen on eth0 interface only.
         "interfaces-config": {
-            "interfaces": [ "ethX" ]
+            "interfaces": [ "eth0" ]
         },
 
         // You also need to tell where to store lease information.
@@ -29,7 +29,7 @@
             {
                 "pools": [ { "pool": "2001:db8:2::/80" } ],
                 "subnet": "2001:db8:2::/64",
-                "interface": "ethX"
+                "interface": "eth0"
             }
         ],
 
@@ -114,7 +114,7 @@
                     // Ignored when reservations-in-subnet is false.
                     "reservations-out-of-pool": false,
                     "subnet": "2001:db8:1::/64",
-                    "pools": [ { "pool": "2001:db8:1:abcd::/64" } ],
+                    "pools": [ { "pool": "2001:db8:1:0:abcd::/80" } ],
                     "valid-lifetime": 40
                 },
 
diff --git a/doc/examples/kea6/simple.json b/doc/examples/kea6/simple.json
index 83953a112d..acd3499b65 100644
--- a/doc/examples/kea6/simple.json
+++ b/doc/examples/kea6/simple.json
@@ -1,14 +1,14 @@
 // This is an example configuration file for DHCPv6 server in Kea.
 // It's a basic scenario with one IPv6 subnet configured. It is
 // assumed that one subnet (2001:db8:1::/64 is available directly
-// over ethX interface.
+// over eth0 interface.
 
 { "Dhcp6":
 
 {
-// Kea is told to listen on ethX interface only.
+// Kea is told to listen on eth0 interface only.
   "interfaces-config": {
-    "interfaces": [ "ethX" ]
+    "interfaces": [ "eth0" ]
   },
 
 // We need to specify the database used to store leases. As of
@@ -37,7 +37,7 @@
     {
       "pools": [ { "pool": "2001:db8:1::/80" } ],
       "subnet": "2001:db8:1::/64",
-      "interface": "ethX"
+      "interface": "eth0"
     }
   ],
 
diff --git a/doc/examples/kea6/softwire46.json b/doc/examples/kea6/softwire46.json
index 4881b845d8..85d1d0cdde 100644
--- a/doc/examples/kea6/softwire46.json
+++ b/doc/examples/kea6/softwire46.json
@@ -5,9 +5,9 @@
 { "Dhcp6":
 
 {
-// Kea is told to listen on ethX interface only.
+// Kea is told to listen on eth0 interface only.
   "interfaces-config": {
-    "interfaces": [ "ethX" ]
+    "interfaces": [ "eth0" ]
   },
 
 // Let's use a Memfile backend to store leases.
@@ -32,7 +32,7 @@
     {
       "pools": [ { "pool": "2001:db8:1::/80" } ],
       "subnet": "2001:db8:1::/64",
-      "interface": "ethX",
+      "interface": "eth0",
 // Include MAP-E Container option for hosts connected to this subnet.
       "option-data": [
         {
diff --git a/doc/examples/kea6/stateless.json b/doc/examples/kea6/stateless.json
index c71546d6a0..bbe1a84de4 100644
--- a/doc/examples/kea6/stateless.json
+++ b/doc/examples/kea6/stateless.json
@@ -8,7 +8,7 @@
 {
 "Dhcp6": {
     "interfaces-config": {
-        "interfaces": [ "ethX" ]
+        "interfaces": [ "eth0" ]
     },
 
 // This is the list of options that will be granted to all clients that ask.
diff --git a/doc/examples/kea6/tee-times.json b/doc/examples/kea6/tee-times.json
index d3b969adc7..e6a21af256 100644
--- a/doc/examples/kea6/tee-times.json
+++ b/doc/examples/kea6/tee-times.json
@@ -5,9 +5,9 @@
 { "Dhcp6":
 
 {
-// Kea is told to listen on ethX interface only.
+// Kea is told to listen on eth0 interface only.
   "interfaces-config": {
-    "interfaces": [ "ethX" ]
+    "interfaces": [ "eth0" ]
   },
 
 // We need to specify the database used to store leases. As of
diff --git a/doc/examples/kea6/with-ddns.json b/doc/examples/kea6/with-ddns.json
index e611d51123..04efb7d313 100644
--- a/doc/examples/kea6/with-ddns.json
+++ b/doc/examples/kea6/with-ddns.json
@@ -1,14 +1,14 @@
 // This is an example configuration file for DHCPv6 server in Kea.
 // It's a basic scenario with one IPv6 subnet configured. It is
 // assumed that one subnet (2001:db8:1::/64 is available directly
-// over ethX interface.
+// over eth0 interface.
 
 { "Dhcp6":
 
 {
-// Kea is told to listen on ethX interface only.
+// Kea is told to listen on eth0 interface only.
   "interfaces-config": {
-    "interfaces": [ "ethX" ]
+    "interfaces": [ "eth0" ]
   },
 
 // We need to specify the database used to store leases. As of
@@ -37,7 +37,7 @@
     {
       "pools": [ { "pool": "2001:db8:1::/80" } ],
       "subnet": "2001:db8:1::/64",
-      "interface": "ethX"
+      "interface": "eth0"
     }
   ],