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IPv6 RD FAQs

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IPv6 6RD Ordering and Configuration

  How do I order IPv6 RD static IP addresses?
After you order your static IP address, wait one hour to configure your modem.
If you have a Residential Account:
Order using the static IP tool. If you need help purchasing IPv6 RD static IP addresses, here are the instructions.
If you have a Small Business Account:
Order using the Account Manager Tool. If you need help purchasing IPv6 RD static IP addresses, here are the instructions.
  How do I setup my modem for IPv6 6rd?
  • Go to the modem compatibility table to see if your modem is IPv6 6RD compatible.
  • On the left hand side, select your modem
  • Select IPv6
  • Select Setup IPv6 6RD
  How do I enable IPv6 6RD on my computer?
Select your operating system from the list below:

IPv6 RD compatible modems

  Which CenturyLink modems are IPv6 6RD compatible?
Go to the modem compatibility table to see if your modem is IPv6 6RD compatible.
  How do I know if a non-CenturyLink modem is 6RD or Dual Stack compatible?
If you are not using an IPv6 compatible CenturyLink modem, we can not guarantee they will work with 6rd or Dual Stack. You will need to check with the manufacturer to verify its compatibility and work with them to configure the modem. CenturyLink Internet Tech Support will not be able to help you with the setup or troubleshooting of your 3rd party modem.

IPv6 RD Troubleshooting

  Troubleshooting IPv6 6rd
To troubleshoot IPv6 6rd, make sure you have completed these steps:
  • 1. Order your static IP address.
    Residential Accounts:
    Order using the static IP tool. If you need help purchasing IPv6 RD static IP addresses, here are the instructions.
    Small Business Accounts:
    Order using the Account Manager Tool. If you need help purchasing IPv6 RD static IP addresses, here are the instructions.
  • 2. Wait 1 hour, then configure your modem.
    • If you ordered a Single static IP, no configuration is needed.
    • If you ordered a Block of static IP addresses, you can find setup instruction here:
  • 3. Unplug the power cord to your modem. Wait 3 minutes.
  • 4. Plug the power cord back into your modem. Wait 3 minutes.
  • 5. Verify that the outside world see's your new IP address by going to http://www.whatismyip.com/ and verify that "Your IP" listed on whatismyip.com is the IP address that you leased.
  • 6. If you are still having trouble, chat with CenturyLink Internet Support
  How do I know if my modem is set up properly for IPv6 6rd?
  • In your web browser address bar, type 192.168.0.1 to go to the modem interface.
  • Select Utilities.
  • Ping either of the CenturyLink IP addresses 2001:428::1 or 2001:428::2.
  • If the ping is successful, your modem is routing correctly.
  How do I know if my computer is set up properly for IPv6 6rd?
In your web browser, try to navigate to http://ipv6.google.com/. If the page opens properly, your computer is routing correctly.

IPv6 RD FAQs

  What is "IPv6 Rapid Deployment" (6rd) over IPv4?
"IPv6 Rapid Deployment" allows ISP's to transfer IPv6 packets over an IPv4 network.
  • 6RD allows both IPv4 and IPv6 connections.
  • It is a transitional tool that can be used until all networks are capable of IPv6.
  What is the CenturyLink IPv6 6rd address space?
2602::0 /24
  Do all internet users need to be immediately concerned about transitioning from IPv4 to IPv6?
No. IPv4 and IPv6 protocols will run concurrently for several years. However, if you are doing business with companies that offer IPv6 only websites, you may need to transition sooner. CenturyLink recommends that you work with your IT contact to determine how quickly you should convert to IPv6.
  What is Dual Stack?
Dual-stack is when both protocols, IPv4 and IPv6, run on the same network infrastructure, and there's no need to encapsulate IPv6 inside IPv4 (using tunneling).
  When will CenturyLink's network be fully IPv6 compatible?
CenturyLink is currently testing Dual Stack on its network. When testing is complete, it will be listed here.
  Which CenturyLink modems are Dual Stack compatible?
CenturyLink is currently testing Dual Stack on its network. When testing is complete, it will be listed here.
  What are the IPv4 and IPv6 DNS Resolvers?
  • IPv4: 205.171.3.65
  • IPv4: 205.171.2.65
  • IPv6: 2001:428::1
  • IPv6: 2001:428::2
  What does the addressing scheme for IPv6 look like?
Where IPv4 uses a dot-decimal address, IPv6 addresses have hexadecimal quartets separated by colons.
  • Example: 2001:428:0000:0000:0000:0000:2198:4567 or 2001:428::2198:4567
  Will I still be able to order IPv4 static IPs after the 6rd or Dual Stack launches?
At this time, IPv4 static IPs can still be ordered from CenturyLink.
  Can I use IPv4 static IPs and 6rd together?
Yes.
  How do I update my DNS records to go along with my IPv6 address?
If you have CenturyLink High-Speed Internet with static IPv4 addressing, you may use your IPs in association with 6RD to have static IPv6 addressing. At this time, CenturyLink is not supporting any DNS for 6RD. If you need this functionality, you may need to use a 3rd party for DNS forward addressing. CenturyLink will not do DNS reverse delegation for any 6rd address or prefix.
  What is IPv6 and why is it needed?
IPV6 was developed because the Internet was running out of IPv4 Addresses. IPv6 has been designed to increase the amount of available addresses and is being deployed world wide.
  What are the advantages of IPv6?
  • Ability to connect to IPv6-addressed-only websites and web services.
  • An Internet addressing scheme that scales to billions of people connected to the Internet with 10s or 100s of billions of smart, connected, devices.
  • More IP addresses than IPv4, approximately 340,000,000,000,000,000,000,000,000,000,000,000,000 IP addresses. 340 undecillion (340 with 36 zeros behind it).
  If I don't have IPv6, will the internet still work?
  • Yes. IPv4 coexists with IPv6.
  • IPv4 will be around for many years, and will continue to function well.