How to disable "terminal width 511" and "terminal length 0" which are sent by default?

[amitsova]

Dear all,

Is there any chance to disable the "terminal width 511" and "terminal length 0" which are sent by default when using the send_multiline function?

From the netmiko log:

INFO:paramiko.transport:Authentication (password) successful!
DEBUG:paramiko.transport:[chan 0] Max packet in: 32768 bytes
DEBUG:paramiko.transport:[chan 0] Max packet out: 4096 bytes
DEBUG:paramiko.transport:Secsh channel 0 opened.
DEBUG:paramiko.transport:[chan 0] Sesch channel 0 request ok
DEBUG:paramiko.transport:[chan 0] Sesch channel 0 request ok
DEBUG:netmiko:write_channel: b'\n'
DEBUG:netmiko:write_channel: b'terminal width 511\n'
DEBUG:netmiko:read_channel:
LKN-BTJ-01#
LKN-BTJ-01#
DEBUG:netmiko:read_channel: terminal
DEBUG:netmiko:read_channel: width 51
DEBUG:netmiko:read_channel: 1

DEBUG:netmiko:Pattern found: (terminal width 511)
LKN-BTJ-01#
LKN-BTJ-01#terminal width 511
DEBUG:netmiko:In disable_paging
DEBUG:netmiko:Command: terminal length 0

DEBUG:netmiko:write_channel: b'terminal length 0\n'
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
**DEBUG:netmiko:read_channel: LKN-BTJ-01#ter
DEBUG:netmiko:read_channel: minal lengt
DEBUG:netmiko:read_channel: h 0

DEBUG:netmiko:Pattern found: (terminal\ length\ 0)
LKN-BTJ-01#terminal length 0
DEBUG:netmiko:
LKN-BTJ-01#terminal length 0
DEBUG:netmiko:Exiting disable_paging**
DEBUG:netmiko:read_channel:
DEBUG:netmiko:Clear buffer detects data in the channel
DEBUG:netmiko:read_channel:
DEBUG:netmiko:write_channel: b'\n'
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:
DEBUG:netmiko:read_channel:

I really don't need these extra commands as I am trying some specific tests on Cisco devices. Please help me to workaround it!

Thank you in advance!

[ktbyers]

You can use the generic driver. It doesn't do anything post login (but it also generally won't have any platform specific behaviors so it might cause you issues in other places).

[amitsova]

Hi Kirk,

Thanks for the quick response!

I was able to workaround it by commenting out the disable_paging and the set_terminal_width definitions in the base_connection.py and in the cisco_ios.py. Not the smartest solution, though :)

What is this generic driver? Would you please share an example?

Thanks,
Adriana

[ktbyers]

Just use device_type="generic".

It will make an SSH connection and do nothing else post login.

You could also make your own class and inherit from the Netmiko class and overwrite the session_preparation method. If you wanted to retain the other methods, but change the session_preparation behavior. Of course, you can just directly edit the Netmiko source code as well.

[amitsova]

I've just found an old discussion with you - #909
And used:

dev_info = {'device_type': 'generic_termserver_ssh', 'ip': i, 'username': 'kmp_ro', 'password': '*****'}

Works perfectly fine for my tests! Thanks a ton!!!!

Adriana

[ktbyers]

Yeah, generic and generic_termserver_ssh are ultimately the same thing (i.e. point to the same class)