3.x appears broken for Linux systems: timeout with very simple usage.

Here’s my test program with netmiko==3.1.0, paramiko==2.7.1:

import sys
import logging
from netmiko import ConnectHandler
logging.getLogger("netmiko").setLevel(logging.DEBUG)
netmiko = logging.getLogger("netmiko")
netmiko.setLevel(logging.DEBUG)
netmiko.handlers.clear()
stream = logging.StreamHandler(stream=sys.stderr)
message_format = "%(asctime)s %(name)s %(levelname)s: %(message)s"
stream.setFormatter(logging.Formatter(message_format))
netmiko.addHandler(stream)
logging.getLogger("paramiko").setLevel(logging.DEBUG)
paramiko = logging.getLogger("paramiko")
paramiko.setLevel(logging.DEBUG)
paramiko.handlers.clear()
stream = logging.StreamHandler(stream=sys.stderr)
message_format = "%(asctime)s %(name)s %(levelname)s: %(message)s"
stream.setFormatter(logging.Formatter(message_format))
paramiko.addHandler(stream)

connection = ConnectHandler(host="127.0.0.1", port=10001, username="operator", password="****", device_type="linux")

result = connection.send_command('echo "cable modem deny 0015.f2fe.ba11"; echo "cable modem deny 0015.f2fe.ba12"; echo "cable modem deny 0015.f2fe.ba13"')
print(result)

This program worked before (on 2.4.2 IIRC), but fails now with a timeout. Will attach log output. For what it’s worth, I’m using panubo/sshd:1.0.2 for my test Linux sshd box. It’s pretty handy. docker run -d -p 10001:22 panubo/sshd:1.0.2. You’ll have to set the password on operator with docker exec before you can ssh into the container.

[Alan-R]

OK. I have no idea why this helps, but it does. I’ll close this and leave the other one open.

[Alan-R]

It’s been my experience that rows and columns only affect curses-based programs (which ask the driver, and changes the behavior of curses programs) . The normal Linux/UNIX tty driver ignores them. They’re there for the reference those programs who care. And the echo program certainly doesn’t care (which is all I was doing).