Added new dhcpv6-relay.yang for dhcpv6 servers

Author: AkhileshSamineni

src/sonic-yang-models/setup.py

@@ -51,6 +51,7 @@
                          './yang-models/sonic-crm.yang',
                          './yang-models/sonic-device_metadata.yang',
                          './yang-models/sonic-device_neighbor.yang',
+                         './yang-models/sonic-dhcpv6-relay.yang',
                          './yang-models/sonic-extension.yang',
                          './yang-models/sonic-flex_counter.yang',
                          './yang-models/sonic-feature.yang',

src/sonic-yang-models/tests/files/sample_config_db.json

@@ -1144,6 +1144,18 @@
                 "high_mem_alert": "disabled",
                 "state": "enabled"
             }
+        },
+        "DHCP_RELAY": {
+            "Vlan111": {
+                "dhcpv6_servers": [
+                    "2a04:5555:41::11"
+                ]
+            },
+            "Vlan777": {
+                "dhcpv6_servers": [
+                    "2a04:5555:41::11"
+                ]
+            }
         }
     },
 

src/sonic-yang-models/tests/yang_model_tests/tests/dhcpv6_relay.json

@@ -0,0 +1,9 @@
+{
+    "DHCPV6_SERVER_INCORRECT_FORMAT": {
+        "desc": "Add dhcpv6_server which is not in correct ipv6-address format.",
+        "eStrKey" : "Pattern"
+    },
+    "DHCPV6_SERVER_VALID_FORMAT": {
+        "desc": "Add dhcpv6_server in correct format."
+    }
+}

src/sonic-yang-models/tests/yang_model_tests/tests_config/dhcpv6_relay.json

@@ -0,0 +1,84 @@
+{
+    "DHCPV6_SERVER_INCORRECT_FORMAT": {
+        "sonic-dhcpv6-relay:sonic-dhcpv6-relay": {
+            "sonic-dhcpv6-relay:DHCP_RELAY": {
+                "DHCP_RELAY_LIST": [
+                    {
+                        "dhcpv6_servers": [
+                            "2001:1:2"
+                        ],
+                        "name": "Vlan500"
+                    }
+                ]
+            }
+        }
+    },
+    "DHCPV6_SERVER_VALID_FORMAT": {
+        "sonic-port:sonic-port": {
+            "sonic-port:PORT": {
+                "PORT_LIST": [
+                    {
+                        "admin_status": "up",
+                        "alias": "eth0",
+                        "description": "Ethernet0",
+                        "mtu": 9000,
+                        "lanes": "1",
+                        "name": "Ethernet0",
+                        "speed": 25000
+                    }
+                ]
+            }
+        },
+        "sonic-vlan:sonic-vlan": {
+            "sonic-vlan:VLAN": {
+                "VLAN_LIST": [
+                    {
+                        "admin_status": "up",
+                        "description": "v6server_vlan",
+                        "dhcpv6_servers": [
+                            "2001:1::2"
+                        ],
+                        "mtu": "9216",
+                        "name": "Vlan400"
+                    }
+                ]
+            },
+            "sonic-vlan:VLAN_MEMBER": {
+                "VLAN_MEMBER_LIST": [
+                    {
+                        "port": "Ethernet0",
+                        "tagging_mode": "tagged",
+                        "name": "Vlan400"
+                    }
+                ]
+            },
+            "sonic-vlan:VLAN_INTERFACE": {
+                "VLAN_INTERFACE_IPPREFIX_LIST": [
+                    {
+                        "family": "IPv6",
+                        "ip-prefix": "2002::1/64",
+                        "scope": "global",
+                        "name": "Vlan400"
+                    }
+                ],
+                "VLAN_INTERFACE_LIST": [
+                    {
+                        "name": "Vlan400"
+                    }
+                ]
+            }
+        },
+        "sonic-dhcpv6-relay:sonic-dhcpv6-relay": {
+            "sonic-dhcpv6-relay:DHCP_RELAY": {
+                "DHCP_RELAY_LIST": [
+                    {
+                        "dhcpv6_servers": [
+                            "2001:1::2"
+                        ],
+                        "name": "Vlan400"
+                    }
+                ]
+            }
+        }
+    }
+}

src/sonic-yang-models/yang-models/sonic-dhcpv6-relay.yang

@@ -0,0 +1,54 @@
+module sonic-dhcpv6-relay {
+
+	namespace "http://github.com/Azure/sonic-dhcpv6-relay";
+
+	prefix sdhcpv6relay;
+
+	yang-version 1.1;
+
+	import ietf-inet-types {
+		prefix inet;
+	}
+
+	import sonic-vlan {
+		prefix vlan;
+	}
+
+	organization "SONiC";
+
+	contact "SONiC";
+
+	description "DHCPv6 Relay yang Module for SONiC OS";
+
+	revision 2021-10-30 {
+		description "First Revision";
+	}
+
+	container sonic-dhcpv6-relay {
+
+		container DHCP_RELAY {
+
+			description "DHCP_RELAY part of config_db.json";
+
+			list DHCP_RELAY_LIST {
+
+				key "name";
+        
+				leaf name {
+					type leafref {
+						path /vlan:sonic-vlan/vlan:VLAN/vlan:VLAN_LIST/vlan:name;
+					}
+				}
+
+                                leaf-list dhcpv6_servers {
+                                        description "Configure the dhcp v6 servers";
+                                        type inet:ipv6-address;
+                                }
+			}
+			/* end of VLAN_LIST */
+		}
+		/* end of container DHCP_RELAY */
+	}
+	/* end of container sonic-dhcpv6-relay */
+}
+/* end of module sonic-dhcpv6-relay */