mclag enhancements as per HLD at Azure/SONIC#596

models/yang/sonic/sonic-mclag.yang

@@ -0,0 +1,242 @@
+module sonic-mclag {
+	namespace "http://github.com/Azure/sonic-mclag";
+	prefix smclag;
+	yang-version 1.1;
+
+    import ietf-yang-types {
+        prefix yang;
+    }
+
+	import ietf-inet-types {
+		prefix inet;
+	}
+
+    import sonic-common {
+        prefix scommon;
+    }
+
+    import sonic-extension {
+        prefix sonic-ext;
+    }
+
+    import sonic-port {
+        prefix prt;
+    }
+
+    import sonic-portchannel {
+        prefix spc;
+    }
+
+    import sonic-vlan {
+        prefix svlan;
+    }
+
+    import sonic-vlan-interface {
+        prefix svlan-intf;
+    }
+
+	organization
+		"SONiC";
+
+	contact
+		"SONiC";
+
+	description
+		"SONIC MCLAG";
+
+	revision 2019-10-01 {
+		description
+			"Initial revision.";
+	}
+
+	container sonic-mclag {
+
+        container MCLAG_DOMAIN {
+
+            list MCLAG_DOMAIN_LIST { 
+                key "domain_id";
+                max-elements 1;
+
+                leaf domain_id {
+                     type uint16 {
+                        range "1..4095" {
+                            error-message "MCLAG Domain ID out of range";
+                        }
+                    }
+                }
+
+                leaf source_ip {
+                    type inet:ipv4-address;
+                }
+                leaf peer_ip {
+                    type inet:ipv4-address;
+                }
+                leaf peer_link {
+                    type union {
+                        type leafref {
+                            path "/prt:sonic-port/prt:PORT/prt:PORT_LIST/prt:ifname";
+                        }
+                        type leafref {
+                            path "/spc:sonic-portchannel/spc:PORTCHANNEL/spc:PORTCHANNEL_LIST/spc:name";
+                        }
+                    }
+                }
+                leaf keepalive_interval {
+                    type uint16 {
+                        range "1..60" {
+                            error-message "MCLAG Domain keepalive interval out of range";
+                            error-app-tag keepalive_interval-invalid;
+                        }
+                    }
+                    default 1;
+                }
+                leaf session_timeout {
+                    type uint16 {
+                        range "1..3600" {
+                            error-message "MCLAG Domain session timeout out of range";
+                            error-app-tag session_timeout-invalid;
+                        }
+                    }
+                    default 30;
+                }
+                must "(keepalive_interval * 3) <= session_timeout" {
+                        error-message "(keepalive interval * 3) <= session_timeout value";
+                        error-app-tag keepalive_interval-invalid;
+                }
+            }
+        }
+
+        container MCLAG_INTERFACE { 
+
+            list MCLAG_INTERFACE_LIST { 
+                key "domain_id if_name";
+
+                leaf domain_id {
+                    type leafref {
+                        path "../../../MCLAG_DOMAIN/MCLAG_DOMAIN_LIST/domain_id";
+                    }
+                }
+
+                leaf if_name {
+                    type leafref {
+                        path "/spc:sonic-portchannel/spc:PORTCHANNEL/spc:PORTCHANNEL_LIST/spc:name";
+                    }
+                }
+                leaf if_type {
+                    type string;
+                }
+            }
+        }
+
+        container MCLAG_UNIQUE_IP {
+
+            list MCLAG_UNIQUE_IP_LIST {
+                key "if_name";
+
+                must "count(../../MCLAG_DOMAIN/MCLAG_DOMAIN_LIST/domain_id) != 0" {
+                    error-message "mclag not configured";
+                    error-app-tag mclag-invalid;
+                }
+
+                must "count(/svlan-intf:sonic-vlan-interface/svlan-intf:VLAN_INTERFACE/svlan-intf:VLAN_INTERFACE_IPADDR_LIST[svlan-intf:vlanName=current()/if_name]) = 0" {
+                    error-message "remove configured ip/v6 address and reconfigure after separate ip configuration";
+                    error-app-tag vlan-intf-ip-invalid;
+                }
+
+                leaf if_name {
+                    type leafref {
+                        path "/svlan:sonic-vlan/svlan:VLAN/svlan:VLAN_LIST/svlan:name";
+                    }
+                }
+                leaf unique_ip {
+                    type enumeration {
+                        enum enable;
+                    }
+                }
+            }
+        }
+
+        //stateDB MCLAG Table
+        container MCLAG_TABLE { 
+            sonic-ext:db-name "STATE_DB"; 
+            sonic-ext:key-delim "|"; 
+
+            config false;
+            description "state db mclag domain table";
+
+            list MCLAG_TABLE_LIST { 
+                key "domain_id";
+
+                leaf domain_id {
+                     type uint16;
+                }
+
+                leaf oper_status {
+                    type scommon:oper-status;
+                }
+
+                leaf role {
+                    type enumeration {
+						enum active;
+						enum standby;
+					}
+                }
+
+                leaf system_mac {
+                    type yang:mac-address;
+                    description
+                     "System MAC Address used for ICCPD";
+                }
+            }
+        }
+
+        //state MCLAG Local interface Table
+        container MCLAG_LOCAL_INTF_TABLE { 
+
+            sonic-ext:db-name "STATE_DB"; 
+            sonic-ext:key-delim "|"; 
+
+            config false;
+            description "state db LOCAL interface table";
+
+            list MCLAG_LOCAL_INTF_TABLE_LIST { 
+                key "if_name";
+
+                leaf if_name {
+                    type string;
+                }
+
+                leaf port_isolate_peer_link {
+                    type boolean; 
+                }
+            }
+        }
+
+
+        //state MCLAG Remote interface Table
+        container MCLAG_REMOTE_INTF_TABLE { 
+
+            sonic-ext:db-name "STATE_DB"; 
+            sonic-ext:key-delim "|"; 
+
+            config false;
+            description "state db remote interface table";
+
+            list MCLAG_REMOTE_INTF_TABLE_LIST { 
+                key "domain_id if_name";
+
+                leaf domain_id {
+                     type uint16;
+                }
+
+                leaf if_name {
+                    type string;
+                }
+
+                leaf oper_status {
+                    type scommon:oper-status;
+                }
+            }
+        }
+    }
+}