使用 Netmiko 进行串行连接时出错 - 我尝试过 /dev/ttyS 、 ttyS 、 COM1 但没有运气

Question

使用 Netmiko 通过串行连接时出现以下错误

1. 我正在使用 OpenSUSE
2. 使用 Netmiko 连接 Cisco 2960 交换机
3. 该脚本使用名为 commands.ios 的文本文件在串行连接后读取并执行它们，例如 - show ip int brief、显示 cdp neigh 等。

from netmiko import ConnectHandler
import serial

with open('commands.ios') as f:
    commands_list = f.read().splitlines()

ios_device = {
    "device_type": "cisco_ios_serial",
    "port": "ttyS8",
    "username": "cisco",
    "password": "password",
    "serial_settings": {
        "baudrate": 9600,
        "bytesize": serial.EIGHTBITS,
        "parity": serial.PARITY_NONE,
        "stopbits": serial.STOPBITS_ONE,
    },
}

net_connect = ConnectHandler(**ios_device)
output = net_connect.send_config_set(commands_list)
print(output)

Traceback (most recent call last):
           File "configserial.py", line 25, in <module>
    net_connect = ConnectHandler(**ios_device)
  File "/usr/lib/python3.6/site-packages/netmiko/ssh_dispatcher.py", line 326, in ConnectHandler
    return ConnectionClass(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/netmiko/cisco/cisco_ios.py", line 17, in __init__
    return super().__init__(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/netmiko/base_connection.py", line 250, in __init__
    self.port = int(port)
ValueError: invalid literal for int() with base 10: 'ttyS8'

Answer 1

您应该在serial_settings 中指定COM 端口，并且您还应该将fast_cli 设置为False。

ios_device = {
    "device_type": "cisco_ios_serial",
    "username": "cisco",
    "password": "cisco",
    "secret": "cisco",
    "fast_cli": False,  # add this line
    "serial_settings": {
        "baudrate": serial.Serial.BAUDRATES[12],  # 9600
        "bytesize": serial.EIGHTBITS,  # 8
        "parity": serial.PARITY_NONE,  # 'N'
        "stopbits": serial.STOPBITS_ONE,  # 1
        "port": "COM3",  # define your COM port here (for example COM3 on Windows or /dev/ttyUSB0 on GNU/Linux)
    },
}

一个完整的工作演示应该如下所示

import serial
from netmiko import ConnectHandler

device = {
    "device_type": "cisco_ios_serial",
    "username": "cisco",
    "password": "cisco",
    "secret": "cisco",
    "fast_cli": False,  # add this line
    "conn_timeout": 30.0, # add this line as well
    "serial_settings": {
        "baudrate": serial.Serial.BAUDRATES[12],  # 9600
        "bytesize": serial.EIGHTBITS,  # 8
        "parity": serial.PARITY_NONE,  # 'N'
        "stopbits": serial.STOPBITS_ONE,  # 1
        "port": "COM3",  # define your COM port here
    },
}

with open(file="commands.ios", mode="r") as f:
    commands_list = f.read().splitlines()

print("Connecting...")
with ConnectHandler(**device) as conn:
    print("Connected")
    if not conn.check_enable_mode():
        conn.enable()
    output = conn.send_config_set(commands_list)
print(output)