diff --git a/specification/network/resource-manager/Microsoft.Network/stable/2020-06-01/examples/NetworkWatcherFlowLogUpdateTags.json b/specification/network/resource-manager/Microsoft.Network/stable/2020-06-01/examples/NetworkWatcherFlowLogUpdateTags.json
new file mode 100644
index 000000000000..f70c97e6f230
--- /dev/null
+++ b/specification/network/resource-manager/Microsoft.Network/stable/2020-06-01/examples/NetworkWatcherFlowLogUpdateTags.json
@@ -0,0 +1,46 @@
+{
+  "parameters": {
+    "api-version": "2020-06-01",
+    "subscriptionId": "subid",
+    "resourceGroupName": "rg1",
+    "networkWatcherName": "nw",
+    "flowLogName": "fl",
+    "parameters": {
+      "tags": {
+        "tag1": "value1",
+        "tag2": "value2"
+      }
+    }
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "name": "Microsoft.Networkdesmond-rgdesmondcentral-nsg",
+        "id": "/subscriptions/subid/resourceGroups/rg1/providers/Microsoft.Network/networkWatchers/nw/FlowLogs/fl",
+        "etag": "W/\"00000000-0000-0000-0000-000000000000\"",
+        "properties": {
+          "provisioningState": "Succeeded",
+          "targetResourceId": "/subscriptions/subid/resourceGroups/rg1/providers/Microsoft.Network/networkSecurityGroups/desmondcentral-nsg",
+          "targetResourceGuid": "00000000-0000-0000-0000-000000000000",
+          "storageId": "/subscriptions/subid/resourceGroups/rg1/providers/Microsoft.Storage/storageAccounts/nwtest1mgvbfmqsigdxe",
+          "enabled": true,
+          "flowAnalyticsConfiguration": {},
+          "retentionPolicy": {
+            "days": 0,
+            "enabled": false
+          },
+          "format": {
+            "type": "JSON",
+            "version": 1
+          }
+        },
+        "tags": {
+          "tag1": "value1",
+          "tag2": "value2"
+        },
+        "type": "Microsoft.Network/networkWatchers/FlowLogs",
+        "location": "centralus"
+      }
+    }
+  }
+}
diff --git a/specification/network/resource-manager/Microsoft.Network/stable/2020-06-01/networkWatcher.json b/specification/network/resource-manager/Microsoft.Network/stable/2020-06-01/networkWatcher.json
index ed5756e6391b..425c52415631 100644
--- a/specification/network/resource-manager/Microsoft.Network/stable/2020-06-01/networkWatcher.json
+++ b/specification/network/resource-manager/Microsoft.Network/stable/2020-06-01/networkWatcher.json
@@ -2100,6 +2100,70 @@
           "final-state-via": "azure-async-operation"
         }
       },
+      "patch": {
+        "tags": [
+          "FlowLogs"
+        ],
+        "operationId": "FlowLogs_UpdateTags",
+        "description": "Update tags of the specified flow log.",
+        "parameters": [
+          {
+            "name": "resourceGroupName",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "description": "The name of the resource group."
+          },
+          {
+            "name": "networkWatcherName",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "description": "The name of the network watcher."
+          },
+          {
+            "name": "flowLogName",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "description": "The name of the flow log."
+          },
+          {
+            "name": "parameters",
+            "in": "body",
+            "required": true,
+            "schema": {
+              "$ref": "./network.json#/definitions/TagsObject"
+            },
+            "description": "Parameters supplied to update flow log tags."
+          },
+          {
+            "$ref": "./network.json#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "./network.json#/parameters/SubscriptionIdParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Request successful. The operation returns updated flow log.",
+            "schema": {
+              "$ref": "#/definitions/FlowLog"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "./networkWatcher.json#/definitions/ErrorResponse"
+            }
+          }
+        },
+        "x-ms-examples": {
+          "Update flow log tags": {
+            "$ref": "./examples/NetworkWatcherFlowLogUpdateTags.json"
+          }
+        }
+      },
       "get": {
         "tags": [
           "FlowLogs"
@@ -4288,6 +4352,18 @@
         "disableTraceRoute": {
           "type": "boolean",
           "description": "Value indicating whether path evaluation with trace route should be disabled."
+        },
+        "destinationPortBehavior": {
+          "type": "string",
+          "description": "Destination port behavior.",
+          "enum": [
+            "None",
+            "ListenIfAvailable"
+          ],
+          "x-ms-enum": {
+            "name": "DestinationPortBehavior",
+            "modelAsString": true
+          }
         }
       },
       "description": "Describes the TCP configuration."