diff --git a/src/backend/app/api/endpoints.py b/src/backend/app/api/endpoints.py
index 44e75fa..e1835ac 100644
--- a/src/backend/app/api/endpoints.py
+++ b/src/backend/app/api/endpoints.py
@@ -50,13 +50,19 @@ async def favicon():
 class BatchConfigRequest(BaseModel):
     config: dict
     switch_ips: List[str]  # 支持多个IP
+    username: str = None  # 添加用户名参数
+    password: str = None  # 添加密码参数
+    timeout: int = None
 
 @router.post("/batch_apply_config")
 async def batch_apply_config(request: BatchConfigRequest):
     results = {}
     for ip in request.switch_ips:
         try:
-            configurator = SwitchConfigurator()
+            configurator = SwitchConfigurator(
+                username=request.username,
+                password=request.password,
+                timeout=request.timeout    )
             results[ip] = await configurator.apply_config(ip, request.config)
         except Exception as e:
             results[ip] = str(e)
@@ -92,6 +98,9 @@ class CommandRequest(BaseModel):
 class ConfigRequest(BaseModel):
     config: dict
     switch_ip: str
+    username: str = None
+    password: str = None
+    timeout: int = None
 
 @router.post("/parse_command", response_model=dict)
 async def parse_command(request: CommandRequest):
@@ -115,9 +124,9 @@ async def apply_config(request: ConfigRequest):
     """
     try:
         configurator = SwitchConfigurator(
-            username=settings.SWITCH_USERNAME,
-            password=settings.SWITCH_PASSWORD,
-            timeout=settings.SWITCH_TIMEOUT
+            username=request.username,
+            password=request.password,
+            timeout=request.timeout
         )
         result = await configurator.safe_apply(request.switch_ip, request.config)
         return {"success": True, "result": result}
@@ -133,16 +142,40 @@ class CLICommandRequest(BaseModel):
     commands: List[str]  # 前端生成的CLI命令列表
     is_ensp: bool = False  # 是否为eNSP模拟器模式
 
+    # 添加方法从commands中提取凭据
+    def extract_credentials(self) -> tuple:
+        """从commands中提取用户名和密码"""
+        username = None
+        password = None
+
+        for cmd in self.commands:
+            if cmd.startswith("!username="):
+                username = cmd.split("=")[1]
+            elif cmd.startswith("!password="):
+                password = cmd.split("=")[1]
+
+        return username, password
+
+    def get_clean_commands(self) -> List[str]:
+        """获取去除凭据后的实际命令"""
+        return [cmd for cmd in self.commands
+                if not (cmd.startswith("!username=") or cmd.startswith("!password="))]
 
 @router.post("/execute_cli_commands", response_model=dict)
 async def execute_cli_commands(request: CLICommandRequest):
     """
     执行前端生成的CLI命令
+    支持在commands中嵌入凭据:
+    !username=admin
+    !password=cisco123
     """
     try:
+        username, password = request.extract_credentials()
+        clean_commands = request.get_clean_commands()
+
         configurator = SwitchConfigurator(
-            username=settings.SWITCH_USERNAME,
-            password=settings.SWITCH_PASSWORD,
+            username=username,
+            password=password,
             timeout=settings.SWITCH_TIMEOUT,
             ensp_mode=request.is_ensp
         )
@@ -220,7 +253,7 @@ async def root():
     }
 
 
-# ... 其他路由保持不变 ...
+
 
 @router.get("/traffic/switch/interfaces", summary="获取交换机的网络接口")
 async def get_switch_interfaces(switch_ip: str):
diff --git a/src/backend/app/api/network_config.py b/src/backend/app/api/network_config.py
index edd2371..4ce195c 100644
--- a/src/backend/app/api/network_config.py
+++ b/src/backend/app/api/network_config.py
@@ -10,6 +10,8 @@ import asyncssh
 from pydantic import BaseModel
 from tenacity import retry, stop_after_attempt, wait_exponential
 
+from src.backend.config import settings
+
 
 # ----------------------
 # 数据模型
@@ -44,18 +46,18 @@ class SSHConnectionException(SwitchConfigException):
 class SwitchConfigurator:
     def __init__(
             self,
-            username: str = "admin",
-            password: str = "admin",
-            timeout: int = 10,
+            username: str = None,
+            password: str = None,
+            timeout: int = None,
             max_workers: int = 5,
             ensp_mode: bool = False,
             ensp_port: int = 2000,
             ensp_command_delay: float = 0.5,
             **ssh_options
     ):
-        self.username = username
-        self.password = password
-        self.timeout = timeout
+        self.username = username if username is not None else settings.SWITCH_USERNAME
+        self.password = password if password is not None else settings.SWITCH_PASSWORD
+        self.timeout = timeout if timeout is not None else settings.SWITCH_TIMEOUT
         self.semaphore = asyncio.Semaphore(max_workers)
         self.backup_dir = Path("config_backups")
         self.backup_dir.mkdir(exist_ok=True)
diff --git a/src/backend/config.py b/src/backend/config.py
index 2e2901c..b5c9863 100644
--- a/src/backend/config.py
+++ b/src/backend/config.py
@@ -16,6 +16,8 @@ class Settings(BaseSettings):
     SILICONFLOW_API_URL: str = os.getenv("SILICONFLOW_API_URL", "https://api.siliconflow.cn/v1")
 
     # 交换机配置
+    SWITCH_USERNAME: str = os.getenv("SWITCH_USERNAME", "admin")
+    SWITCH_PASSWORD: str = os.getenv("SWITCH_PASSWORD", "admin")
     SWITCH_TIMEOUT: int = os.getenv("SWITCH_TIMEOUT", 10)
 
     # eNSP配置
diff --git a/src/backend/requirements.txt b/src/backend/requirements.txt
index 3febf22..fc3d18e 100644
--- a/src/backend/requirements.txt
+++ b/src/backend/requirements.txt
@@ -1,7 +1,6 @@
 fastapi==0.110.0
 uvicorn==0.29.0
 python-dotenv==1.0.1
-pysnmp
 pydantic==2.6.4
 pydantic-settings==2.2.1
 openai==1.93.2