When one mentions IP addressing, the first thing that comes up is IPv4 versus IPv6 debate. In case there still exists someone who is unaware of IPv4, here’s a short explanation:
IPv4 (Internet Protocol version 4) is the fourth version of the Internet Protocol (IP), which is the primary protocol used for routing data across the internet. The IPv4 address space consists of 32-bit addresses, which allows for a total of approximately 4.3 billion unique IP addresses.
However, Internet is expanding, and that’s happening for quite a while now. And it does bring a lot of beneficial things into our lives, but it has been everything but beneficial for the IPv4 addresses.
With rapid growth of Internet, and increasing number of devices which require IP addresses, the available pool of IPv4 addresses (yes, 4.3 billion!) is decreasing daily!
That becomes a serious issue for ISPs all over the world, since it means that there is a certain limit in assigning and allocating IP addresses to new customers. And unfortunately, that limit is decreasing with each day. The Internet Assigned Numbers Authority – IANA (https://www.iana.org/numbers), the organization responsible for distributing IPv4 addresses to RIR’s (Regional Internet Registries) is run out of the available IP addresses supply.
Regional Internet Registries are also nearly exhausting all of their supplies, which is not looking good for the ISPs.
Facing challenges: Are ISPs helpless?
Considering this, ISPs are running into several challenging situations regarding the decreasing the global IPv4 address pool, that may include:
- Difficulty in assigning addresses to new customers. This may take quite an impact on their revenue and customer base.
- Increased costs. In order to keep up, ISP may be in need of acquiring additional IP addresses from other organizations. Which can result in spending much more money.
- Several security issues. ISP cannot guarantee that limited IP addresses they assign will not be part of malicious activities.
- The need of IPv6 implementation, which brings up several additional issues:
- implementation being slow and time-consuming process;
- implementation requiring the upgrade and update of the current ISP equipment, infrastructure and devices;
- compatibility issues – meaning that some devices and applications may not work properly in IPv6, since the protocols may not be fully compatible.
With everything currently happening, in certain regions of the world, IPv4 addresses are no longer available for allocating to organizations and service providers. The RIRs in the given regions have exhausted their supplies.
There might be hope?
But – to sound a bit more optimistic, there are certain activities that make acquiring of the IPv4 addresses possible. ISPs have several ways of conducting acquiring the necessary supplies, and some of them are:
- Dynamic IP addresses – this might help with conserving IP addresses, but may cause issues with certain applications and protocols.
- IPv4 address transfer – this allows ISP to lease or buy additional addresses from other provider or organization. It can require higher costs, and coordination between multiple parties.
- IPv6 deployment and implementation.
- Virtualization – using VLANs and VPNs, creating multiple virtual networks and share the same IP address among several customers.
- IPv4 address sharing through Network Address Translation (NAT) – CGN – Carrier Grade NAT allows multiple customers to share one public IP. It does conserve the IP addresses, but also may cause issues with certain applications (online gaming, accessing home security camera or DVR applications).
Is the IPv6 solution that can quickly solve the current issues?
IPv6 was mentioned as a solution to all of the existing issues with IPv4. But what does that mean?
First of all, what is IPv6?
Just like IPv4, it’s an internet protocol, much younger than its older sibling IPv4, developed to address the limitations and issues world has run into with IPv4.
IPv6 uses 128-bit addresses, which provides quite larger pool of unique addresses (approximately 3.4 x 10^38). That number of unique addresses could easily solve the existing limitations and issues. However, it is still not that simple.
The new protocol was initially proposed in 1998 by the Internet Engineering Task Force (IETF) in response to the anticipated exhaustion of IPv4 addresses. The standard was published in December 1998 as RFC 2460, “Internet Protocol, Version 6 (IPv6) Specification.” But it wasn’t until 2012 that many major ISPs, web companies, and hardware vendors permanently enabled IPv6 on their networks and services.
Since 2021, many countries have high adoption rate of IPv6; US, Japan, China and Europe being the leaders. However, there are still some countries that have low to none adoption rate of IPv6. Despite this, IPv6 deployment continues to grow daily, as more networks, devices, and services are upgraded to support it.
What makes it so difficult to deploy IPv6 globally in much higher rate?
Unfortunately, there are several reasons for deployment of IPv6 globally to be much difficult that it appears to be. Much of them brings up additional issues which require solution, in order to perform deployment successfully. Some of the mentioned issues may be:
- Compatibility: IPv6 and IPv4 are not fully compatible. Which means that some devices and applications may not work properly on IPv6 networks. This can make it difficult for organizations and ISPs to transition to IPv6 without disrupting their existing operations.
- Complexity: IPv6 is a more complex protocol than IPv4, and it requires significant changes to network infrastructure and devices. This can make it difficult for organizations and ISPs to implement IPv6. It can also require additional training for network administrators and engineers.
- Lack of interest: Some ISPs and organizations may not see the immediate benefits of upgrading to IPv6. That can make it difficult to justify the costs and effort required to implement it.
- Cost: Upgrading to IPv6 can be costly. It requires purchasing new equipment, training staff, and making changes to software and applications. This can be a significant barrier for some organizations and ISPs, especially those with limited budgets.
- Legacy systems: Many organizations and ISPs have existing systems and infrastructure that are based on IPv4. Unfortunately, that can make it difficult to upgrade to IPv6 without disrupting their existing operations.
- Security concerns: IPv6 is a relatively new protocol. It may have some security vulnerabilities that have not yet been discovered. This can make it difficult for organizations and ISPs to implement IPv6 without exposing their networks to potential security risks.
What can ISPs do Regarding IPv6 transition?
All of these potential issues leave us questioning if there is a way to, at least, workaround the global issue with limitation of IPv4 addresses. The answer is – Yes there is a way.
There are several ways for addressing translation from IPv4 to IPv6, as seen earlier in this article, and there is a list of few more:
- Dual-Stack approach, which allows organizations and ISPs to run both IPv4 and IPv6 on their network simultaneously. This allows them to continue to support existing IPv4 devices and applications while also being able to take advantage of the benefits of IPv6.
- Tunneling techniques, which allow IPv6 packets encapsulation within IPv4 packets. This allows IPv6 traffic transmission over an IPv4 network and vice versa, allowing organizations and ISPs to gradually transition to IPv6 without disrupting their existing operations.
- Translation techniques which allows IPv4 and IPv6 to communicate with each other by converting the packets from one protocol to another.
It is inevitable that these solutions may require additional training and education for the network administrators and engineers, which also will result in spending more money, but looking things long term, that is investing that will definitely pay off.
Is there additional strategy?
Besides earlier mentioned solutions, it is also important to mention the strategies to use to make the transition process faster:
- Encouraging the production of IPv6-enabled devices such as routers, servers, and other networking equipment. That can make it easier for organizations and ISPs to implement new protocol.
- Governments can provide incentives to organizations and ISPs to encourage them to implement IPv6. This can include funding, tax breaks, or other financial incentives.
- Encouraging the development of IPv6-enabled software and applications. This can help organizations and ISPs to take advantage of the benefits of IPv6 without disrupting their existing operations.
- Providing education and training to organizations and ISPs, That can help them to understand the benefits of IPv6 and the best practices for implementing it.
- Encouraging the development of IPv6-only networks can help to drive the adoption of IPv6 and make it more widely available.
- Encouraging the use of IPv6 to IPv4 Translation protocols. It can help organizations and ISPs to communicate with both IPv4 and IPv6 devices while they are still in the process of transitioning.
What about future?
The transition from IPv4 to IPv6 is crucial step in ensuring that Internet can continue to grow, expand and evolve. IPv4 addresses are living their last days, and will eventually run out. IPv6 provides much larger address space that will guarantee the address for all the devices and services connected to the Internet.
It is of the utmost importance for the ISPs to start planning the transition as soon as possible, since it is quite a time-consuming and rather complex process. But very beneficial. With all the facts out there, it is not hard to conclude that the future of the Internet, depends on that. It is important to know that continued growth and development of Internet is essential for global communication, economic growth, innovation, education and many more.
Transition to IPv6 is one of the most important steps in ensuring that Internet will continue to grow and support these needs in many years to come.
