{"id":56,"date":"2018-08-08T00:50:55","date_gmt":"2018-08-07T22:50:55","guid":{"rendered":"http:\/\/starhackademy.net\/?p=56"},"modified":"2021-05-27T19:10:32","modified_gmt":"2021-05-27T17:10:32","slug":"a-short-introduction-to-ipv6","status":"publish","type":"post","link":"https:\/\/starhackademy.net\/index.php\/2018\/08\/08\/a-short-introduction-to-ipv6\/","title":{"rendered":"A short introduction to IPv6"},"content":{"rendered":"\n<p>In september 2015, I published an article on LinkedIn about IPv6 because &nbsp; ARIN announced that they have exhausted their IPv4 address space! I think that we will, finally, see a lot of enterprise adopting IPv6.<\/p>\n\n\n\n<p>The North American organization is now only able to deliver very small chunk of IPv4 addresses for help in transitioning from IPv4 to IPv6.<br \/>First of all, IPv6 is not a new protocol. IETF is working on this since 1990s.<br \/>IPv4 is (was?) 32 bit address space, with a lot of unusable IP addresses (Test, Multicast, Reserved for ?Future Use?, Network address, Subnetting, &#8230;). The theoretical maximum number of addresses is 2^32 (4294967296). In IPv6, the maximum number of addresses is 2^128 (340282366920938463463374607431768211456 or 3,4*10^39). <br \/>Most modern systems are able to run dual stack (IPv4 and IPv6), as are most modern application.<br \/>While IPv6 is still IP in the payload and the general behaviour, the way to use, route and allocate addresses is totally different than IPv4.<br \/>First of all, about address allocation. The system administrator should be able to forget everything he knows about IPv4 address allocation. In IPv6, you NEVER subnet in less than \/64 networks (I wrote NEVER, this is NEVER). This is the most difficult part for Net and Sys admins. They must learn a new way of thinking. The idea behind this is to give a public IP address to all connected devices (nice for IoT).<br \/>The general routing protocol between the ISP is still BGPv4, but if you were using OSPFv2 for internal routing, you&#8217;ll have to use OSPFv3, right now.<br \/>The way the headers are organised in IPv6 reduce routers load.<br \/>Quality of servvice as Security were also built from the beginning in the protocol. In fact, IPSEC was defined for IPv6.<br \/>There are working, standardised discovery and autoconfiguration protocols to help the administrator to set-up his basic IPv6 Network.<br \/>So a tight integration with your DNS will be mandatory as 128 bits of IP addresses makes impossible to learn\/remember all your important devices IP addresses like you (probably) did with IPv4. Therefore, a good working DNS infrastructure will be needed.<\/p>\n\n\n\n<p>If I see that there is an interest in this short introduction, I&#8217;ll give a more detailed introduction on the working internals of IPv6 for SYS and NET admins!<br \/>You can also find a lot of information on <a href=\"http:\/\/ipv6actnow.com\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/ipv6actnow.com<\/a>.<\/p>\n\n\n\n<p style=\"font-size:15px\"><em><a href=\"https:\/\/starhackademy.net\/index.php\/2012\/12\/22\/online\/\">Pascal Fuks<\/a> has achieved the <a href=\"https:\/\/he.net\" target=\"_blank\" rel=\"noreferrer noopener\">HE <\/a>certification of &#8220;IPv6 Sage&#8221; while he managed to drive his former company, Financial Art, to\u00a04 stars at RIPE classification on companies implementing IPv6.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In september 2015, I published an article on LinkedIn about IPv6 because &nbsp; ARIN announced that they have exhausted their IPv4 address space! I think that we will, finally, see a lot of enterprise adopting IPv6. The North American organization is now only able to deliver very small chunk of IPv4 addresses for help in [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[23,24],"tags":[],"class_list":["post-56","post","type-post","status-publish","format-standard","hentry","category-devops","category-network"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>A short introduction to IPv6 - Star Hackademy<\/title>\n<meta name=\"description\" content=\"IPv6 Primer. Why IPv6? A short introduction to addressing and DNS for IPv6. Time to add IPv6 support to your emails and websites!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/starhackademy.net\/index.php\/2018\/08\/08\/a-short-introduction-to-ipv6\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A short introduction to IPv6 - Star Hackademy\" \/>\n<meta property=\"og:description\" content=\"IPv6 Primer. Why IPv6? A short introduction to addressing and DNS for IPv6. 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