importtelnetlibimporttime# ===================== 配置区（修改以下内容）=====================DEVICE_LIST=[("192.168.1.13",23,"admin","Huawei@123"),# 思科设备1#("192.168.1.2", 23, "admin", "Cisco@123"), # 思科设备2]# 思科设备要执行的命令（示例）COMMANDS=["conf t",# 过特权模式"vlan 10",# 配置"show vlan",# 查看配置]CONNECT_TIMEOUT=10CMD_WAIT_TIME=2# ===================== 核心函数（适配思科设备）=====================deftelnet_cisco_device(host,port,username,password,commands):"""连接思科设备并执行命令，适配思科交互逻辑"""try:tn=telnetlib.Telnet(host,port,timeout=CONNECT_TIMEOUT)print(f"\n开始处理思科设备{host}=============================================================")# 1. 适配思科登录提示符（思科常用 Login: 而非 Username:）# 兼容两种提示符，避免匹配失败try:tn.read_until(b"Login:",timeout=5)# 思科默认登录提示符excepttelnetlib.socket.timeout:tn.read_until(b"Username:",timeout=5)# 兼容部分思科设备的Username提示tn.write(username.encode('utf-8')+b"\n")time.sleep(1)# 2. 输入密码（思科密码提示符为 Password:，和华为一致）tn.read_until(b"Password:",timeout=5)tn.write(password.encode('utf-8')+b"\n")time.sleep(2)# 思科登录后加载配置稍慢，延长等待# 3. 进入特权模式（思科核心：普通模式→特权模式，需enable密码）# 如果设备无需enable密码，注释以下3行tn.write(b"enable\n")# 进入特权模式命令tn.read_until(b"Password:",timeout=5)# enable密码提示符tn.write(password.encode('utf-8')+b"\n")# 输入enable密码（通常和登录密码相同）time.sleep(1)# 4. 设置终端不分页（避免命令结果被截断，思科核心优化）tn.write(b"terminal length 0\n")time.sleep(1)# 5. 批量执行命令forcmdincommands:print(f"执行命令：{cmd}")tn.write(cmd.encode('utf-8')+b"\n")time.sleep(CMD_WAIT_TIME)# 读取结果，忽略乱码，适配思科编码result=tn.read_very_eager().decode('utf-8',errors='ignore')# 过滤掉命令回显（只保留结果）result=result.replace(cmd,"").strip()print(f"结果：\n{result[:800]}...")# 思科结果较长，显示前800字符# 6. 退出并关闭连接tn.write(b"exit\n")tn.close()print(f"思科设备{host}处理完成 ==========================================================\n")exceptExceptionase:print(f"思科设备{host}处理失败：{str(e)}=================================================\n")# ===================== 主程序 =====================if__name__=="__main__":fordeviceinDEVICE_LIST:host,port,username,password=device telnet_cisco_device(host,port,username,password,COMMANDS)print("所有思科设备处理完毕！")
