DCN September 2016 - Page 10

centre of attention THE JOY OF SIX Nathalie Künneke-Trenaman of RIPE NCC explains why IPv6 is the only option for securing the future of the Internet. L ast year 3.2 billion people used the Internet according to the ITU, connecting a total of 4.9 billion devices (Gartner). Most of these used IPv4 addresses, but IPv4 is running out – and fast. That means there’s a big problem looming, with Gartner predicting 20 billion devices will be using the Internet in 2020, and Ericsson predicting 70 per cent of the world’s population will be online using a mobile phone by then. Consumer behaviour is changing, and people are spending more and more time online, as well as expecting to connect more devices than ever before. This increasing demand on Internet infrastructure is only going to grow, making the need for IPv6 increasingly pressing. trillion addresses which is enough to tide us far beyond the foreseeable future. The only real barrier to adoption is that IPv4 and IPv6 do not speak the same language, which means a customer using just one won’t be able to connect to a business using the other. IPv6 use is growing. Eleven per cent of worldwide users access Google via IPv6 at present, and this number will increase quickly, with tech heavyweights like Apple making IPv6 support essential in iOS 9, and the two largest UK Internet Service Providers intent on making the transition – Sky has already made massive progress towards full IPv6 deployment and BT has committed to switching all of its UK customers onto IPv6 by the end of the 2016-17 financial year. The state of the Internet today Every device which connects to the Internet needs an IP address to identify it. This was originally done using IPv4, which was designed to supply 4.3 billion addresses, but in most of the world it’s already completely exhausted – including North America, which announced in 2015 that it had absolutely no IPv4 addresses left. IPv6, the replacement for IPv4, has space for 340 trillion, trillion, 10 Workarounds and temporary solutions Amid all this positive change towards IPv6, some businesses – telecoms providers included – remain locked in the old mindset of relying on IPv4. These businesses rely on workaround measures such as Carrier-Grade NAT and IPv4 trading to try and extend their IPv4 supplies, believing these workarounds to be cheaper and easier than deploying IPv6. However, each of these workarounds is flawed, and businesses should be wary of continuing to rely on these temporary solutions for much longer. CG NATs have been used for many years now to stretch the life of IPv4, typically sharing a single IP address between thousands of customers. However, the technology cannot scale indefinitely, and each time a NAT is layered it adds complexity and increases the chance that ͽѡݥɕ)Q́ͽչս́Ёѡ)͕Օ́ձ͕ɥ̸)]9Pɕ̰́)ɔѕݡɕ́ѽѕ%A؁ɕ́ɕ̰)䁽ͽ̸ ͕ͥ́ݡ)ͥ9Q́ѡѕɴ)ոѡɥͬɥ)Ё̸9Ёѡ̰)Ёͽ͕٥̰Ս́٥)ɕͥ́͡ɥ)ѽ̰ͥݽeЁݽɬٕȁ9Q)͔ѡɕ䁽Ѽ)ѥ٥䰁ѡչ)ɥ́ѡ%ѕɹи)%AЁɅ́ݕȁͽѥ)ٽ٥չɥ́ɝͅѥ)͕%AЁɕ͕́Ѽѡ́ݡ)ѡ%ӊéɽ́ɭа)ݥѠѡɥѥɕ䁑ɥٕ)쁅́%AЁɕ͕́)͍ɍȰѡɥݥѥՔѼ((