Connection problems with plink (putty for commandline) to EOS devices

[StephanH]

Hello all,
I want to connect to EOS devices with plink (the command line version of putty).
I need plink because I will use the communicaton in scripts on my PC.

With XOS all works fine. For example I use this command:

"plink ip –l user –pw passwort show switch" => I receive the expected result

On EOS I use:

"plink ip –l user –pw passwort show system" => I receive Error: „FATAL ERROR: Server sent disconnect message.

Same behaviour if I use a config-file with the CLI-commands (like show system) instead of the CLI-command in the plink command line.

If I use the command:

"plink ip –l user –pw passwort" (without a CLI command) I receive no error but an oben CLI-session and can manualy set command on the open CLI-session.

Now the quesion. Does anybody know how I can connect to EOS via plink?

Best regards
Stephan

[StephanH]

Hello Erik,

your workaround works ( in Windows, too).

Thank you for help.

Best regards
Stephan

[Erik_Auerswald]

Hi Stephan,

I do not have a simple workaround for the S-Series. 😞

The following Expect script works for me on Ubuntu GNU/Linux with an SSA set up with IP address 10.0.0.101 and user account admin:password:
#! /usr/bin/expect spawn ssh admin@10.0.0.101 expect { {word:?} {send "password\r"} } expect { {)->} {send "show system\r"} } expect { {)->} {send "exit\r"} } exit
I have never tried Expect on Windows.

The above script is just a proof-of-concept, it is not robust or production ready.

Best regards,
Erik

[StephanH]

Hello Erik,

thank you for the very good hint.
It works quite nice with a b-series switch and version 6.61.08.0013

but not with a s-series switch and version 8.42.02.0012

On the s-series the output looks like:

----------------------------------------
echo show system | plink.exe IP -l USER -pw PASSWORD

B O N D E D S 4 C H A S S I S Command Line Interface



Extreme Networks, Inc.

145 Rio Robles

San Jose, CA 95134

Phone: +1 408 579-2800

E-mail: support@extremenetworks.com

WWW: http://www.extremenetworks.com



(c) Copyright Extreme Networks, Inc. 2016



Chassis Serial Number: 141xxxx

Chassis Firmware Revision: 08.42.02.0012

-----------------------
Nothing more!!!

Maybe you have one more good idea?

Stephan

[Erik_Auerswald]

Hi Stephan,

you can use the following workaround:
echo show system | plink.exe IP -l USER -pw PASSWORD (even on Windows)

Erik