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Using PPP with the Cisco® 675 or 678 Modem FAQs

Codes and Passwords

Your Equipment

Troubleshooting

Manual Processes


Q: What are EXEC and ENABLE passwords for and why should I set them?

A: The EXEC and ENABLE passwords provide two levels of security to your Cisco 675 or 678 modem. The EXEC password controls access to the Cisco 675 or 678 modem, and the ENABLE password controls whether changes can be made to the CBOS (Cisco Broadband Operating System).

Setting these passwords will prevent unauthorized access to your modem. Unauthorized access could potentially cause a reconfiguration of your modem without your knowledge (presuming your modem is set with telnet enabled).

Using the PPP Conversion program (for Microsoft® Windows®) will give you a window in which you can set the EXEC and ENABLE passwords. If you need to set these manually, refer to How do I manually set my EXEC and ENABLE passwords.


Q: Where do I look for the EXEC and ENABLE passwords for my Cisco 675 or 678 modem?

A: Qwest employees would not have any way to know what passwords were set. Only the person who set the EXEC and ENABLE passwords would know what they are and where to find them if they have been recorded.

If you did not set the EXEC and ENABLE passwords previously, more than likely they are not set. There are no 'default' passwords. Until the passwords are set, the modem has no passwords.

If the passwords have been set but you do not know what they are, refer to What do I do if I do not know my EXEC and ENABLE passwords.


Q: What do I do if I do not know my EXEC and ENABLE passwords?

A: If you have set EXEC and ENABLE passwords but do not remember them, you will need to follow this process to recover access to your Cisco 675 or 678 modem:

  1. Set up a Hyperterminal (Microsoft Windows) or Zterm (Macintosh) session with your Cisco 675 or 678 modem.
    (Note: You will need to reconfigure your NVRAM once you finish these instructions.)
  2. Unplug the power cord from the Cisco 675 or 678 modem and then plug it back in (this is known as power cycling).
  3. When the Alarm light goes on, press CTRL-C. This will put the Cisco 675 or 678 modem in debug mode and you will see the following prompt: =>
    (Note: This may take a few tries to get the timing right. You must press CTRL-C when the alarm light is on.)
    1. Type the following at the debug mode prompt, pressing the Enter key after each entry:
        es 6 [space between es and 6]
        m0
        go
        Reboot
      (Note: You will only see your typed entries. The modem will be reset once you reboot.)
    2. This will erase sector 6 of memory which holds the enable/exec mode passwords. Unfortunately, this also erases the running config in NVRAM which means you will need to reconfigure the NVRAM; it does remove the passwords.


Q: Where do I find my serial cable?

A: Your serial cable should have come in the same box as the Cisco 675 or 678 modem.


Q: I cannot find my serial cable. What should I do?

A: If you did not receive a serial cable with your Cisco 675 or 678 modem, contact the Qwest Broadband™ support center at 1-800-247-7285.


Q: What is a DB-9 connector?

A: The DB-9 connector has a total of nine pins (laid out in two rows).


Q: What is an RJ-45 connector?

A: The RJ-45 connector looks similar to the connectors on phone cables, except it is bigger.


Q: Where is the MGMT port of my Cisco 675 or 678 modem?

A: The MGMT port of your Cisco 675 or 678 is located on the back of the modem. An example of a MGMT port image is provided here.


Q: Where is the serial port on my computer?

A: The serial port should be located on the back of your computer. An example of a serial port image is provided here.


Q: What is a DB-9-DB-25 adaptor?

A: The serial cable you got with your Cisco 675 or 678 modem in your PC Kit is a DB-9 connector. This connector works for most PCs. If you need to connect to a DB-25 port on your computer, you will need a DB-9-to- DB-25 adaptor. Qwest.net does not provide this cable, so you will need to visit your local computer hardware vendor.

Note: The DB-9-DB-25 adaptor is used on PCs only.


Q: I use a Macintosh. What is in the Mac Kit? Do I need a USB to DIN8 adaptor?

A: The Mac Kit contains:

  • User guide
  • Mac serial cable with a DIN8 adaptor on one end and an RJ-45 on the other end. This is the standard Mac serial cable shipped to customers.
  • Qwest.net CD
    Note: You only need the adaptor if you do not have a serial port.
    If you have an iMac® or a Power Macintosh® with a USB port (instead of a serial port), you must connect a USB to DIN8 serial adaptor to a USB port on your Macintosh.


Q: What happens if I enter an incorrect user name or password, or an incorrect gateway address (if using static IP address)?

A: Entering an incorrect gateway address while using static IP addresses will prevent you from establishing a connection with Qwest. When you enter the incorrect gateway address, it is not checked for you and there will be no informative error message to tell you you've made a mistake. Instead, you will just not be able to connect.


Q: How do I reconfigure the NVRAM?

A: To reconfigure the NVRAM, you first erase the Cisco 675 or 678 modem configuration and then reset the modem. To do this, follow the instructions for your current Cisco 675 or 678 modem configuration mode and IP addressing:

  1. Make sure you've set up all the cables for a connection through the serial port on your computer.
  2. Set up a Hyperterminal (Microsoft Windows) or Zterm (Macintosh) session with your Cisco 675 or 678 modem:
    1. PPP mode with Dynamic IP address customers and a single static IP: type the following, pressing the Enter key after each entry:
        enable
        set nvram erase
        write

        reboot

        enable
        set password enable [your preferred password for enable mode]
        set password exec [your preferred password for exec mode]
        set ppp wan0-0 ipcp 0.0.0.0
        set ppp wan0-0 dns 0.0.0.0
        set ppp wan0-0 login [your user name for Qwest.net]
        set ppp wan0-0 password [your password for Qwest.net]
        set ppp restart enabled
        set nat enabled
        set dhcp server enabled
        write
        reboot

    2. PPP mode with multiple Static IP addresses customers: type the following, pressing the Enter key after each entry:

        enable
        set nvram erase
        write

        reboot

        enable
        set password enable [user's preferred password for enable mode]
        set password exec [your preferred password for exec mode]
        set ppp wan0-0 ipcp 0.0.0.0
        set ppp wan0-0 dns 0.0.0.0
        set ppp wan0-0 login [your user name for Qwest.net]
        set ppp wan0-0 password [your password for Qwest.net]
        set ppp restart enabled
        set nat disabled
        set dhcp server disabled
        set int eth0 [your reserved gateway address]
        set int eth0 mask 255.255.255.248
        write
        reboot


Q: How do I enable telnet?

A: Set up a Hyperterminal (Microsoft Windows) or Zterm(Macintosh) session with your Cisco 675 or 678 modem. Once established, enter the following command and press the Enter key after the entry:

    set telnet enable


Q: How do I disable Telnet?

A: Set up a Hyperterminal (Microsoft Windows) or Zterm (Macintosh) session with your Cisco 675 or 678 modem. Once established, enter the following command and press the Enter key after the entry:

    set telnet disable


Q: How do I manually configure my modem for PPP?

A: Go to the PPP Conversion Web page and follow the instructions for the non-Windows users.


Q: How do I manually set my EXEC and ENABLE passwords?

A: To set the EXEC and ENABLE passwords manually in your Cisco 675 or 678 modem, you must first access the Cisco 675 or 678 modem through Hyperterminal (Windows) or Zterm (Macintosh).

  1. Set up a Hyperterminal (Microsoft Windows) or Zterm (Macintosh) session with your Cisco 675 or 678 modem.
  2. At the initial screen, press the Enter key on the keyboard.
  3. When prompted for your password, press Enter again.
  4. At the CBOS prompt, type the word enable and press Enter.
  5. When prompted for a password, press Enter and then type the following commands:
      set password exec yourpass (Sets the general access password when you initially access the Cisco 675 or 678)
      set password enable yourpass (Sets the enable mode password for access to the CBOS primary command)
      write

      reboot

      Note: The EXEC and ENABLE passwords provide two levels of security for your Cisco 675 or 678 modem. The EXEC password controls access to the Cisco 675 or 678 modem, and the ENABLE password controls whether changes can be made to the CBOS.