The Stub Lab FAQ’s

This page will answer the most commonly asked questions for those who are interested in using the Stub Lab provided by Free CCNA Workbook.

  • What equipment is used in the Stub Lab and where can I find the topology diagram?

  • I provided Free CCNA workbook with my shipping address, when will I get my free “Stub Lab”?
    • The Stub Lab is available to use by registered users at no charge and is hosted by Free CCNA Workbook. The Stub Lab is NOT free to have; Free CCNA Workbook will not ship you a fully assembled lab, that is nonsense.
  • Do I have to pay to use and/or reserve a time slot on the Stub Lab?
    • Absolutely Not!!!
      • The Stub Lab was built so that any visitor could sign up and reserve a time-slot for free so they can complete labs found on the Free CCNA Workbook website using real hardware.
  • How do I reserve a time slot to use the lab?
    • ◦First, you will need to register at the Free CCNA Lab Schedule Portal if you have not already done so and than you’ll be able to sign in and view the current Free CCNA Lab reservation matrix. From there you can create a new reservation by selecting “Reserve” in the date/timeslot you wish to reserve. Remember that the lab operates on UTC time.
  • What application do I use to connect to the lab and how do I connect to each of the lab devices?
    • To connect to the lab you’ll need to use an application that supports telnet such as Putty or SecureCRT. Once you have a telnet capable application you’ll need to connect to to the address; lab.freeccnaworkbook.com on the following port numbers;
      • Port 2001 for Router 1
      • Port 2002 for Router 2
      • Port 2003 for Router 3
      • Port 2004 for Router 4
      • Port 2005 for Router 5
      • Port 2006 for Switch 1
      • Port 2007 for Switch 2
      • Port 2008 for Switch 3
    • If you wish to connect to the Free CCNA Lab using SSH than SSH to the following port numbers for the specified device;
      • Port 3001 for Router 1
      • Port 3002 for Router 2
      • Port 3003 for Router 3
      • Port 3004 for Router 4
      • Port 3005 for Router 5
      • Port 3006 for Switch 1
      • Port 3007 for Switch 2
      • Port 3008 for Switch 3
  • I am unable to access the Stub Lab via telnet, why?
    • You need to verify that you’re not behind a Corporate or ISP firewall that is blocking outbound telnet access. You may need to ask your network administrator or ISP if they are blocking telnet access.
  • I’ve connected to the lab but I do not have a Router/Switch prompt?
    • The first step is to check and see if the device is currently powered on. To do this you’ll need to use the ~p command to bring up the console server power menu. This menu will independently control the power for the device you’ve established an exec session to.
  • Why did I receive the error message, “Abusive command detected?”
    • Safeguards have been put in place to prevent people from doing “stupid things” to the devices that require staff to attend to them such as erasing the boot image on the switch which requires the image to be install back onto flash via xModem. This is a waste of our time therefore we have disabled the following commands;
      • ¹copy run
      • ²delete
      • erase
      • format
      • debug all
      • no service password-recovery
    • ¹ The commands; copy running-config startup-config and copy startup-config running-config (or any abbreviation thereof) are allowed.
    • ² The delete command can only be used to delete non-critical files, such as vlan.dat on switches.
  • How do I send the break signal (ctrl+pause break) to the device(s) perform password recovery on the Cisco Routers?
    • To send the break signal you’ll need to use the ~b command.
  • My reservation has disappeared, what happened?
    • The Free CCNA workbook Staff reserves the right to drop any lab reservation(s) at any time for any reason.
  • I have a question that cannot be found in the FAQ’s, where do I get answers?
    • If you have a question that is not in the FAQ’s you can contact Free CCNA Workbook support at; support @ freeccnaworkbook dot com