交换机的创建时，类型默认且不可修改

@@ -143,7 +143,7 @@
                         </el-form-item>
                         </el-form-item>
                         <el-form-item label="交换机类型：" prop="exchangeType">
                         <el-form-item label="交换机类型：" prop="exchangeType">
                             <el-select v-model="exchange_addForm.exchangeType" style="width: 240px" clearable
                             <el-select v-model="exchange_addForm.exchangeType" style="width: 240px" clearable
-                                       size="small"
+                                       size="small" disabled
                                        placeholder="请选择交换机类型">
                                        placeholder="请选择交换机类型">
                                 <el-option
                                 <el-option
                                         v-for="item in exchangeTypeList"
                                         v-for="item in exchangeTypeList"