diff --git a/specification/network/resource-manager/Microsoft.Network/preview/2021-02-01-preview/examples/NetworkSecurityPerimeterPatch.json b/specification/network/resource-manager/Microsoft.Network/preview/2021-02-01-preview/examples/NetworkSecurityPerimeterPatch.json
new file mode 100644
index 000000000000..4c32a318a47b
--- /dev/null
+++ b/specification/network/resource-manager/Microsoft.Network/preview/2021-02-01-preview/examples/NetworkSecurityPerimeterPatch.json
@@ -0,0 +1,31 @@
+{
+  "title": "Patch Network Security Perimeter",
+  "parameters": {
+    "api-version": "2021-02-01-preview",
+    "subscriptionId": "subId",
+    "resourceGroupName": "rg1",
+    "networkSecurityPerimeterName": "nsp1",
+    "parameters": {
+      "tags": {
+        "description": "nsp1"
+      }
+    }
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "name": "TestNetworkSecurityPerimeter",
+        "id": "/subscriptions/subId/resourceGroup/rg1/providers/Microsoft.Network/networkSecurityPerimeters/TestNetworkSecurityPerimeter",
+        "type": "Microsoft.Network/networkSecurityPerimeters",
+        "tags": {
+          "description": "nsp1"
+        },
+        "location": "East US 2 EUAP",
+        "properties": {
+          "perimeterGuid": "guid",
+          "provisioningState": "Succeeded"
+        }
+      }
+    }
+  }
+}
diff --git a/specification/network/resource-manager/Microsoft.Network/preview/2021-02-01-preview/examples/NspAccessRuleReconcile.json b/specification/network/resource-manager/Microsoft.Network/preview/2021-02-01-preview/examples/NspAccessRuleReconcile.json
index 2f45196b3dc9..a416485ea007 100644
--- a/specification/network/resource-manager/Microsoft.Network/preview/2021-02-01-preview/examples/NspAccessRuleReconcile.json
+++ b/specification/network/resource-manager/Microsoft.Network/preview/2021-02-01-preview/examples/NspAccessRuleReconcile.json
@@ -6,7 +6,7 @@
     "resourceGroupName": "rg1",
     "networkSecurityPerimeterName": "nsp1",
     "profileName": "profile1",
-    "accessRuleName": "accessRule1",
+    "accessRuleName": "accessRuleName1",
     "parameters": {
       "properties": {}
     }
diff --git a/specification/network/resource-manager/Microsoft.Network/preview/2021-02-01-preview/networkSecurityPerimeter.json b/specification/network/resource-manager/Microsoft.Network/preview/2021-02-01-preview/networkSecurityPerimeter.json
index a9e90c164a0e..3cc30c5578a1 100644
--- a/specification/network/resource-manager/Microsoft.Network/preview/2021-02-01-preview/networkSecurityPerimeter.json
+++ b/specification/network/resource-manager/Microsoft.Network/preview/2021-02-01-preview/networkSecurityPerimeter.json
@@ -143,6 +143,43 @@
             "$ref": "./examples/NetworkSecurityPerimeterDelete.json"
           }
         }
+      },
+      "patch": {
+        "tags": [
+          "NetworkSecurityPerimeters"
+        ],
+        "operationId": "NetworkSecurityPerimeters_Patch",
+        "description": "Patch Tags for a Network Security Perimeter.",
+        "parameters": [
+          {
+            "name": "parameters",
+            "in": "body",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/UpdateTagsRequest"
+            },
+            "description": "Parameter supplied to the network security perimeter."
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Request is successful. Returns the resulting network security perimeter resource.",
+            "schema": {
+              "$ref": "#/definitions/NetworkSecurityPerimeter"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "./network.json#/definitions/CloudError"
+            }
+          }
+        },
+        "x-ms-examples": {
+          "Patch Network Security Perimeter": {
+            "$ref": "./examples/NetworkSecurityPerimeterPatch.json"
+          }
+        }
       }
     },
     "/subscriptions/{subscriptionId}/providers/Microsoft.Network/networkSecurityPerimeters": {
@@ -1369,6 +1406,24 @@
       },
       "description": "Properties of network security perimeter."
     },
+    "UpdateTagsRequest": {
+      "type": "object",
+      "properties": {
+        "id": {
+          "readOnly": true,
+          "type": "string",
+          "description": "Network security perimeter identifier."
+        },
+        "tags": {
+          "type": "object",
+          "additionalProperties": {
+            "type": "string"
+          },
+          "description": "List of tags for Network Security Perimeter"
+        }
+      },
+      "description": "Update tags request."
+    },
     "NspProfile": {
       "type": "object",
       "properties": {