Configure your modem/router in PPP Mode for static IP addresses

Overview

Once you have leased a block of static IP addresses, you will need to configure the Cisco 675 or 678 for PPP mode. This page provides configuration instructions and performance information if you enter an incorrect gateway address while using static IP addresses.

 


 

Configuring the Cisco 675 or 678 modem in PPP mode for static IP addresses (/29, /28, /27, /26):

IMPORTANT: Before you begin configuring your modem, the DHCP client in the PC should be disabled and should be configured statically with one of the five IP addresses from the assigned block with a subnet mask of 255.255.255.248.

The following steps are applicable to version 2.0.1 of the Cisco 675 or 678 software called CBOS. All CBOS commands used below are typed at the CBOS prompt and are followed by the RETURN key.

  1. Using the current User Guide for the Cisco 678, connect the 675 or 678 modem to a COM port on the PC.
  2. Following directions in the guide, start the Hyperterminal program. Set the connection parameters for the program as provided in the guide. Be sure to disable any flow control.
  3. Using the guide, enter the "exec" and the "enable" passwords and check that the software version is 2.0.1 or 2.4.1 for the 678. The factory defaults for these passwords are blank.
  4. You will see the prompt CBOS#. CBOS stands for Cisco Broadband Operating System and the # sign indicates that the modem is in the "enabled" or "privileged" mode for accepting configuration commands.
  5. Type set nvram erase.
  6. Type write. This command, in combination with the previous one, erases all configuration commands from the non-volatile RAM.
  7. Type reboot. This causes the modem to reboot and come up with the default configuration. which is PPP mode.
  8. Following the guide, enter the "exec" and the "enable" passwords again. You will see the prompt CBOS#.
  9. Type set nat disable. This disables Network Address Translation (NAT) so that private addresses cannot be routed by the 675 or 678.
  10. Type set dhcp server disable. This disables the 675 or 678 from acting as a DHCP server.
  11. Type set PPP wan0-0 ipcp 0.0.0.0. (zeroes and not the letter O.) This causes the modem to negotiate via PPP an IP address for the modem. The network has been configured by the engineers to send the second highest value via the PPP negotiation. This actually becomes the IP address of the Ethernet interface with NAT disabled.
  12. Type set ppp wan0-0 dns 0.0.0.0
  13. Type set PPP wan0-0 login xxxxx , where xxxxx is your user name assigned by Qwest.net. This is found in the welcome letter and is also used to access Qwest.net services such as your e-mail box.
  14. Type set PPP wan0-0 password yyyyy, where yyyyy is the password initially assigned to you. IMPORTANT: The user name and password are case-sensitive. One of the services offered by the Qwest.net start page is the ability for you to change your password. If you change your user name or password, you also need to change them to the same value on the Cisco 675 or 678 modem.
  15. Type the optional command set PPP restart enabled. If for some reason the 675 or 678 goes "untrained" during a session, this will automatically attempt to re-train until successful.
  16. Type set int eth0 address zzz.zzz.zzz.zzz, where zzz.zzz.zzz.zzz is the Reserved Gateway Address from your block of Static IP's
  17. Type set int eth0 netmask 255.255.255.248
  18. If the service is in CAP mode, Skip to the write step (step 20) below.
  19. If The service is in DMT mode, the Cisco modem needs the following commands:
    set int wan0-0 disable
    set int wan0-0 vpi 0
    set int wan0-0 vci 32
    set int wan0-0 enable
     
  20. Type write.
  21. Type reboot.
  22. Using the modem guide, log in to the 675 or 678 with the exec and enable passwords. Type sh nat. Verify that NAT is turned off.
  23. Type sh dhcp server. Verify that the DHCP server is turned off.
  24. Type sh int eth0. The IP address of the Ethernet interface should be the second highest address from the block assigned to you.
For additional information, refer to Cisco 675/678 Notes
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Configuring the Cisco 675 or 678 modem in PPP mode for /32 (1 usable) static IP address:

The configuration for 1 static IP address is the same as it is for dynamic addressing. The difference is that our Radius server will assign your static IP address to your CPE each time you log on.

The following steps are applicable to version 2.0.1 of the Cisco 675 or 678 software called CBOS. All CBOS commands used below are typed at the CBOS prompt and are followed by the RETURN key.

  1. Using the current User Guide for the Cisco 678, connect the 675 or 678 modem to a COM port on the PC.
  2. Following directions in the guide, start the Hyperterminal program. Set the connection parameters for the program as provided in the guide. Be sure to disable any flow control.
  3. Using the guide, enter the "exec" and the "enable" passwords and check that the software version is 2.0.1 or 2.4.1 for the 678. The factory defaults for these passwords are blank.
  4. You will see the prompt CBOS#. CBOS stands for Cisco Broadband Operating System and the # sign indicates that the modem is in the "enabled" or "privileged" mode for accepting configuration commands.
  5. Type set nvram erase.
  6. Type write. This command, in combination with the previous one, erases all configuration commands from the non-volatile RAM.
  7. Type reboot. This causes the modem to reboot and come up with the default configuration, which is PPP mode.
  8. Following the guide, enter the "exec" and the "enable" passwords again. You will see the prompt CBOS#.
  9. Type set nat enable. This enables Network Address Translation (NAT) so that private addresses can be routed by the 675 or 678.
  10. Type set dhcp server enable. This enables the 675 or 678 to act as a DHCP server.
  11. Type set PPP wan0-0 ipcp 0.0.0.0. (zeroes and not the letter O.) This causes the modem to negotiate via PPP an IP address for the modem. The network has been configured by the engineers to send the second highest value via the PPP negotiation. This actually becomes the IP address of the Ethernet interface with NAT disabled.
  12. Type set ppp wan0-0 dns 0.0.0.0.
  13. Type set PPP wan0-0 login xxxxx, where xxxxx is your user name assigned by Qwest.net. This is found in the welcome letter and is also used to access Qwest.net services such as your e-mail box.
  14. Type set PPP wan0-0 password yyyyy, where yyyyy is the password initially assigned to you. IMPORTANT: The user name and password are case-sensitive. One of the services offered by the Qwest.net start page is the ability for you to change your password. If you change your user name or password, you also need to change them to the same value on the Cisco 675 or 678 modem.
  15. Type the optional command set PPP restart enabled. If for some reason the 675 or 678 goes "untrained" during a session, this will automatically attempt to re-train until successful.
  16. If the service is in CAP mode, Skip to the write step (step 18) below.
  17. If The service is in DMT mode, the Cisco modem needs the following commands:
    set int wan0-0 close
    set int wan0-0 vpi 0
    set int wan0-0 vci 32
    set int wan0-0 open
     
  18. Type write.
  19. Type reboot.
  20. Using the modem guide, log in to the 675 or 678 with the exec and enable passwords. Type sh nat. Verify that NAT is turned on.
  21. Type sh dhcp server. Verify that the DHCP server is turned on.
    22.
Cisco 675/678 Notes
  1. Using serial MGMT port with terminal emulator (ie: HyperTerminal) or telnet session, the modem can be restored to Default Settings by the following commands:
    set nvram erase
    write
    reboot
  2. If the Cisco 678 modem is restored to Default Settings, it's Ethernet IP is 10.0.0.1.
  3. If the Cisco 678 modem is restored to Default Settings, the serial MGMT port with terminal emulator must be used for initial configuration.
  4. The Qwest.net Dynamic IP and /32 Static IP services requires NAT routing on Cisco 678 modem. Use of DHCP on the modem is highly recommended. Using NAT with DHCP, the customer PC or PCs are configured to obtain an IP address and DNS server address automatically via DHCP from the DSL modem.
  5. The Qwest.net /29-/26 Static IP services will typically use pure routing on the Cisco 678 modem. The customer PCs or PCs will be manually configured with IP address, Subnet mask, Default Gateway, and DNS server addresses. The Default Gateway will be the LAST_USABLE_IP configured on the eth0 interface of the Cisco 678.
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Configuring the Actiontec 1520 modem in PPP mode for multiple IP addresses (/29, /28, /27, /26)

  1. Open your web browser and press your web browser's Stop button.
  2. In the address bar enter the ip address of the Actiontec. By default it's http://192.168.0.1.
  3. You should get a screen that at the top says Actiontec. If you don't, contact Technical Support.
  4. Click on Setup / Configuration link
  5. Set Up / Configuration Screen-
         a) click on Advanced Setup link
         b) click on Begin Advanced Setup button
  6. 6) Configuring the Advanced Settings Screen-
         a) click on Next button
  7. 7) WAN IP Address Screen-
         a) leave Obtain an IP Address through PPPoA selected
         b) Check Unnumbered Mode box
         c) Set Unnumbered IP Address (Gateway Address) to last usable IP in Qwest.net static IP block
         d) Set Unnumbered IP Address (Unnumbered Subnet Mask) to network mask of Qwest.net static IP block
              i) for /29, set to 255.255.255.248
              ii) for /28, set to 255.255.255.240
              iii) for /27, set to 255.255.255.224
              iv) for /26, set to 255.255.255.192
         e) Click on Next button
  8. 8) Broadband Connection via PPPoE/PPPoA Screen-
         a) leave PPP auto connect checked
         b) Set User Name to Qwest.net PPP login name
         c) Set Password to Qwest.net PPP login password
         d) Leave Static IP blank
         e) Click on the Next button (required to save above)
  9. 9) Wireless Settings Screen-
         a) select DHCP Server link (far left)
  10. 10) DHCP Server Screen-
         a) select Off
         b) Click on the Next button (required to save above)
  11. 11) Services Blocking Screen-
         a) select NAT link (far left)
  12. 12) NAT Screen-
         a) select Off
         b) Click on the Next button (required to save above)
  13. 13) Static Routing Screen-
         a) select Save and Restart link (far left)
  14. 14) Save and Restart Screen-
         a) select Save and Restart button
For additional information, refer to Actiontec 1520 Notes
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Configuring the Actiontec 1520 modem in PPP mode for 1 IP address (/32) address:

The configuration for 1 static IP address is the same as it is for dynamic addressing. The difference is that our Radius server will assign your static IP address to your CPE each time you log on.
  1. 1) Open your web browser and press your web browser's Stop button.
  2. 2) In the address bar enter the ip address of the Actiontec. By default it's http://192.168.0.1.
  3. 3) You should get a screen that at the top says Actiontec. If you don't, contact Technical Support.
  4. 4) Click on Setup / Configuration.
  5. 5) Click on Basic Setup.
  6. 6) Setup Screen - click on the Next button.
  7. 7) Broadband Connection Screen-
         a) leave PPPoA selected
         b) click on the Next button
  8. 8) DSL Broadband Connection - PPP Screen-
         a) set User Name to Qwest.net PPP login name
         b) set Password to Qwest.net PPP login password
         c) leave Static IP blank
         d) click on the Next button
  9. 9) Save and Restart Screen-
         a) select Save and Restart button
Actiontec 1520 Notes
  1. The reset button on the back of the DSL Actiontec modem or the Utility Menu can be used to restore Default Settings.
  2. If the Actiontec modem is restored to Default Settings, it is configured via http://192.168.0.1.
  3. The Qwest.net Dynamic IP and /32 Static IP services requires NAT routing on DSL Actiontec modem. Use of DHCP on the modem is highly recommended. Using NAT with DHCP, the customer PC or PCs are configured to obtain an IP address and DNS server address automatically via DHCP from the DSL modem. In this case, http://192.168.0.1 is used to access and configure the modem.
  4. The Qwest.net /29-/26 Static IP services will typically use pure routing on the DSL Actiontec modem. The customer PCs or PCs will be manually configured with IP address, Subnet mask, Default Gateway, and DNS server addresses. In this case, http://LAST_USABLE_IP is used to access and configure the modem.
  5. The Qwest.net /29-/26 Static IP services can be used with NAT routing and/or DHCP on the DSL Actiontec modem. This will be the exception since most customers have leased a larger block for pure routing, and they will manually configure IP settings on the PC(s). The configuration for this exception has not been provided.
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What happens if I enter an incorrect gateway address while using static IP addresses?

Entering an incorrect gateway address while using static IP addresses will prevent you from establishing a connection with Qwest.net. 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.

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