Real World IPv6

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Deutsche Telekom and others go with subscriber-focused lightweight approach

Back IP6. Latest Publications. Download All Export List. Loading Standards. See full list in standards search. Subscribe to alerts for ETSI deliverables. It looks like homenet hasn't produced a single RFC so far, let alone production-grade implementation that I could use. There seems to be a time gap between theory and reality. At what point is this deemed irresponsible, or at least not best practice? I'm planning one PI prefix per site, less than sites initially, but eventually it could be thousands of sites..

I raised a similar question on the ripe ipv6-wg mailing list last year, there was a good answer from Gert Doering that touched on the second of your design alternatives. Hi Ivan, I believe many global companies don't require each site connected to the Internet directly.

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What I'm not sure though: Would one PI block be enough for a global company? Thanks, Milan Kulik.

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Constructive courteous comments are most welcome. Anonymous trolling will be removed with prejudice. Building network automation solutions 9 module online course Start now! There are two designs I could come up with that satisfy all requirements: A network in which every single site advertises its own provider-independent globally routable IPv6 prefix to all upstream ISPs, effectively exploding the IPv6 routing tables world-wide.

Two or more Internet uplinks result in a mission impossible scenario. Enno Rey 23 October, Ivan Pepelnjak 23 October, Guy Morrell 23 October, Dave Taht 24 October, There are several different ways to work through a complex issue, and it always involves planning. In order to ensure nothing is missed, a plan must be created that will detail information such as timelines, groups of devices to be migrated, priorities, etc. In doing so, you can break the complex situation into more manageable pieces that are easier to work on and communicate to the rest of the organization.

Again, IPAM can assist with this task by creating reports that can be interpreted and used in the planning process. This is only a brief look at the potential complexity. It can be taken even further by different makes and models of equipment that coexist on the network. But to deal with the concern, the best bet is to reduce the complexity. You can do this by planning out your migration by groups, devices, time, or whatever works best for you. The important part is that everyone agrees on it, and it is something the organization can live with in terms of effectiveness for the business process.

It should also be sure to have every single component on the network, and be followed, checked, and updated as needed throughout the migration project. One of the primary ways to start with the plan creation is just doing an audit of your environment.

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This may require inventory lists, network scanning tools or possibly just concatenating all the distributed spreadsheets and systems with the information you need. Once you have a basic overview — then you can drill down into one environment for a more detailed inspection. This way you can refine your processes as you go based on the realities of your environment.

Legacy systems can be defined basically as older systems. They likely are missing some common functionality from current technology, but still exist because they perform a key or important function for the organization just fine, thus there is no reason to replace it.


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When an organization deploys IPv6, the devices on the network need to be able to have an IPv6 address, along with their existing IPv4 address a technique known as dual-stacking. If the device cannot utilize a v6 address, it will eventually cause conflicts and problems in not being able to be found or communicate properly this is where tunnels come in and they have their own management overhead. It is possible to force it to use v4 only, but as more IPv6 capable systems come online in your network, the legacy environments will become more of a liability. The best way to deal with legacy systems is analyzing them for compatibility.

You will need to get on the server s and perform a capability audit. By scanning and detailing the network, it can help determine compatibility for devices connected to the network, and provide a report.

This is highly recommended not only for this function, but to assist in keeping addressing correct during migration. More importantly, it will help you get an idea of compatibility on the hardware level as well as the application level. Network audits may sound like a simple solution, and to a point it is.

However, it is inevitable that an important piece of equipment will not be compatible.

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At that time, the deployment plan for IPv6 expands to include all of these devices, which must be planned for migration themselves and implemented on a parallel schedule to the entire migration. The sooner the compatibility of all devices can be determined the better, as it will allow for a timeline to be determined, and a better view of the scope for the entire IPv6 deployment. The final concern is getting a handle on your existing IPv4 inventory. For many network administrators, this will involve getting new equipment, implementing it, hanging onto the old equipment temporarily for backup purposes, then getting rid of it.

But it is more than just equipment. This is also the final step of IPv6 migration where IPv4 is removed from the network, so while it should still be a concern, there is a decent amount of time before this happens. To counter this concern, planning is still the key.

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However, at this point it is less about the plan itself, and more about executing it. By this stage, dual-stacking should be fully implemented and all non-compatible devices either replaced or their purpose moved to a compatible device. This is where the concern comes in. If one device is missed at this point, it will immediately lose all communication with the network if it has not already.

Add in the sheer volume of devices this may have to be done for, and suddenly the scope grows even more.