Generic Send / Expect Devices - Response returns for prior command.

[iunderwood]

I'm working on a script that leverages netmiko to complete onboarding for a number of managed PDUs from BayTech. I am using netmiko 4.1.2.

From what I have been able to tell from the documentation and threads around the Internet, the proper device type to use for this is the "terminal_server" variety. The initial output upon connect is pretty lengthy, so I do specify a base prompt ">" as such:

 baytech_rpdu = {
        'device_type': 'terminal_server',
        'host': kwargs['rpduIP'],
        'username': config['defaults']['rpdu']['baytech']['un'],
        'password': config['defaults']['rpdu']['baytech']['pw']
    }

    rpdu = netmiko.ConnectHandler(**baytech_rpdu)

    rpdu.set_base_prompt(pri_prompt_terminator=">")

Once I get the prompt, the next step is to go into command mode, which is a defined attention character sent 5 times, which works in the code as well. I use command timing since the sequence is not visible, and the previous prompt is no longer available:

    # Jump to Configuration Mode
    response = rpdu.send_command_timing(";;;;;")

    # Do our configuraiton via CLI
    if re.search("Enter Request :", response):
        _logger.debug("Config Mode Active")`

This is the part where I am somewhat stuck: I want to use a list of tuples that define the command I want to output, followed by the prompt I am waiting for to advance to the next command in the list:

        command_sequence = [("C", "Enter Request :"),
                            ("9", "Enter Module Name"),
                            (kwargs['rpduName'], "Enter Request :"),
                            ("", "Accept changes ?")
                            ]

I process this command set through a loop as such:

       for command in command_sequence:
            command_response = rpdu.send_command_timing(command[0])
            if re.search(command[1], command_response):
                _logger.debug("Command Response Match")
                # Response was good, continue hte loop.
                continue
            else:
                _logger.debug("Command Response Mismatch")
                # Response did not match, break the loop.
                break

What I am finding is that the value of command_response is actually from the results of the prior run through the loop, which throws off the error check, and I need to move the conditions in the list down:

        command_sequence = [("C", "Enter Request :"),
                            ("9", "Enter Request :"),
                            (kwargs['rpduName'], "Enter Module Name"),
                            ("", "Enter Request :")
                            ]

I have some logger output as below (cut in after the login is mostly done). After my debug statement where "Config Mode Active" is shows, the first output is from the last send_command_timing statement, which

DEBUG:netmiko:read_channel: 
DEBUG:netmiko:read_channel: mmands

MMP-11>
DEBUG:netmiko:Pattern found: (>|>) 

opening access to internal Power Device



MMP-11 Series
(C) 2008 BayTech
F2.04

Option(s) Installed:
True RMS Current
Internal Temperature



Total kW-h: 310
------------------------------------
|   Input    | True RMS | Peak RMS |
|   Circuit  |  Current |  Current |
------------------------------------
|   Input A  |   0.5 A  |   0.5 A  | 
|   Input B  |   0.5 A  |   0.5 A  | 
|   Input C  |   0.0 A  |   0.0 A  | 
------------------------------------------
|    Circuit     | True RMS  | Peak RMS  |
|    Breaker     |  Current  |  Current  |
------------------------------------------
|      CKT1      |  0.5 Amps |  0.5 Amps |
|      CKT2      |  0.0 Amps |  0.0 Amps |
|      CKT3      |  0.0 Amps |  0.0 Amps |
-------------------------------------------------------------------------------
|    Circuit     | True RMS  | Peak RMS  |  True RMS   |   Average  |  Volt-  |
|     Group      |  Current  |  Current  |   Voltage   |    Power   |  Amps   |
-------------------------------------------------------------------------------
|   Circuit M1   |  0.0 Amps |  0.0 Amps | 208.9 Volts |    0 Watts |    4 VA |
|   Circuit M2   |  0.5 Amps |  0.5 Amps | 209.3 Volts |   75 Watts |  113 VA |
|   Circuit M3   |  0.0 Amps |  0.0 Amps | 208.9 Volts |    0 Watts |    4 VA |
|   Circuit M4   |  0.0 Amps |  0.0 Amps | 208.8 Volts |    0 Watts |    4 VA |
|   Circuit M5   |  0.0 Amps |  0.0 Amps | 206.5 Volts |    0 Watts |    3 VA |
|   Circuit M6   |  0.0 Amps |  0.0 Amps | 206.1 Volts |    0 Watts |    3 VA |
-------------------------------------------------------------------------------

Int. Temp: 102.2 F
Switch 1: Open 2: Open

 1)...MOD 1 Outlet 1  : On            2)...MOD 1 Outlet 2  : On           
 3)...MOD 1 Outlet 3  : On            4)...MOD 1 Outlet 4  : On           
 5)...MOD 1 Outlet 5  : On            6)...MOD 2 Outlet 1  : On           
 7)...MOD 2 Outlet 2  : On            8)...MOD 2 Outlet 3  : On           
 9)...MOD 2 Outlet 4  : On           10)...MOD 2 Outlet 5  : On           
11)...MOD 3 Outlet 1  : On           12)...MOD 3 Outlet 2  : On           
13)...MOD 3 Outlet 3  : On           14)...MOD 3 Outlet 4  : On           
15)...MOD 3 Outlet 5  : On           16)...MOD 4 Outlet 1  : On           
17)...MOD 4 Outlet 2  : On           18)...MOD 4 Outlet 3  : On           

19)...MOD 4 Outlet 4  : On           20)...MOD 4 Outlet 5  : On           
21)...MOD 5 Outlet 1  : On           22)...MOD 5 Outlet 2  : On           
23)...MOD 5 Outlet 3  : On           24)...MOD 5 Outlet 4  : On           
25)...MOD 5 Outlet 5  : On           26)...MOD 6 Outlet 1  : On           
27)...MOD 6 Outlet 2  : On           28)...MOD 6 Outlet 3  : On           
29)...MOD 6 Outlet 4  : On           30)...MOD 6 Outlet 5  : On           

Type Help for a list of commands

MMP-11>
DEBUG:netmiko:read_channel: 
DEBUG:netmiko:[find_prompt()]: prompt is MMP-11>
DEBUG:netmiko:write_channel: b';;;;;\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: 
    Module: 1  

DEBUG:netmiko:read_channel:     Attention Character:  ;  
    MMP-11                           (2 ,1).....1  
    Status......................................S
    Configure...................................C
    Unit Reset.................................RU
    Logout......................................T
  Enter Request :
DEBUG:netmiko:read_channel: 
DEBUG:netmiko:read_channel: 
DEBUG:npt-onboard/oboard_baytech:Config Mode Active
DEBUG:netmiko:write_channel: b'C\n'
DEBUG:netmiko:read_channel: C

    Module: 1  
    Attention Character:  ;  
    MMP-11                           (2 ,1).....1  
    Status......................................S
    Configure...................................C
    Unit Reset.................................RU
    Logout......................................T
  Enter Request :
DEBUG:netmiko:read_channel: 
DEBUG:netmiko:read_channel: 
DEBUG:npt-onboard/oboard_baytech:Command Response Match
DEBUG:netmiko:write_channel: b'9\n'
DEBUG:netmiko:read_channel: 9

  Copyright(C) Bay Technical Associates 2020
  UPD Ethernet Host Module 
  Revision F4.34.01       Module 1    
  Hardware 2.01         Serial number 31165967  colilo version 2.02.02


    Status..........................1
    Serial Port Configuration.......2
    Serial Port Device Name.........3
    Attention Character.............4
    Disconnect Timeguard............5
    Connect Port ID Echo............6
    Login Setup.....................7
    Network Port Configuration......8
    Module Name.....................9
    Power Device Management........10
    Firmware / Config Download.....11
    Exit............................X,CR

  Enter Request :
DEBUG:netmiko:read_channel: 
DEBUG:netmiko:read_channel: 
DEBUG:npt-onboard/oboard_baytech:Command Response Match
DEBUG:netmiko:write_channel: b'MCRC01RPDU1\n'
DEBUG:netmiko:read_channel: MCRC01RPDU1

  Module Name is:  Universal PD                                                  


  Enter Module Name (32 chars max).  : 
DEBUG:netmiko:read_channel: 
DEBUG:netmiko:read_channel: 
DEBUG:npt-onboard/oboard_baytech:Command Response Match
DEBUG:netmiko:write_channel: b'\n'
DEBUG:netmiko:read_channel: 

  Copyright(C) Bay Technical Associates 2020
  UPD Ethernet Host Module 
  Revision F4.34.01       Module 1    
  Hardware 2.01         Serial number 31165967  colilo version 2.02.02


    Status..........................1
    Serial Port Configuration.......2
    Serial Port Device Name.........3
    Attention Character.............4
    Disconnect Timeguard............5
    Connect Port ID Echo............6
    Login Setup.....................7
    Network Port Configuration......8
    Module Name.....................9
    Power Device Management........10
    Firmware / Config Download.....11
    Exit............................X,CR

  Enter Request :
DEBUG:netmiko:read_channel: 
DEBUG:netmiko:read_channel: 
DEBUG:npt-onboard/oboard_baytech:Command Response Match

I'm not even sure where to dig in to find out why the command and it's subsequent output is staggered.

Thanks!