NCM Error: Login has failed. Didn't see device prompt as expected.

[Soumyadipta Ganguly]

Hello All

 

While running NCM backup on a device, I am getting following error.

 

SPC-NCM-20007: Capture Running Script Returned Error [252]: Login Error:
Host 10.19.180.214:
Login has failed. Didn't see device prompt as expected. 

 

 

What might be the cause of getting such error and how to overcome it? Kindly help.

 

 

Thanks in advance

Soumyadipta

[Tarun Pamu]

Hi Soumyadipta,

 

There may be several different reasons behind this error. However i would first have a look at the below Tech Doc and see if this helps.

 

Error SPC-NCM-20007 is received when doing a device configuration capture in NCM 

 

Regards,

Tarun

[Widjaja Sangtoki]

I assume you are using Perl script. So the script failed within the following code section.

  # login output should contain the right prompt characters
  if( $login_output !~ /\#\s*\z/ )
  {
    $msg = "Login has failed. Didn't see device prompt as expected.";
    $ssh->close();
    return( 252, $msg );
  }

The code section is validating the output after SSH into the device. It uses Regex '/\#\s*\z/' which is basically looking '#' character in the output, i.e. the prompt.

As the prompt ('#') doesn't exist it throws out "Login has failed. Didn't see device prompt as expected." error message.

You can test by launch bash login shell on the SpectroSERVER machine and run the following command to SSH into the device.

     ssh <user>@<device hostname>

And verify if you are getting the correct prompt as what the Perl script has expected. If no then you have to fix this SSH issue or you may want to change the Perl codes.

[Soumyadipta Ganguly]

Hi Widjaja

 

Thanks for your help. Following the part in my script like above mentioned. Would you please help me on the change I need to make in this part of the script so that it stop throwing errors?

 

# if( $login_output !~ /\#\s*\z/ )
if ( $login_output !~ /\#/i )
{
$msg = "Login has failed. Didn't see device prompt as expected.";
$ssh->close();
return( 252, $msg );
}

 

Thanks

Soumyadipta Ganguly

[Olaf Schalenberg]

Hi,

 

in order to get the CA  Cisco NX OS script working I've done the following changes

...

      # if( $login_output !~ /\#\s*\z/ )
      if( $login_output !~ /#/ )   
      {
          $msg = "Login has failed. Didn't see device prompt as expected.";
          $ssh->close();
          #return( 252, $msg );
          return( 252, $login_output );
      }

 

...

 
  # because the configuration contains also a % sign, do not exit
  #    if( scalar grep { $_ =~ /^%/ } @config )
  #   {
  #        # Ensure show running actually returned the config and not an error
  #        # message containing '%'
  #        return( 245, @config );
  #    }

 

Regards,

Olaf