{"id":3101,"date":"2015-03-04T18:17:53","date_gmt":"2015-03-04T18:17:53","guid":{"rendered":"https:\/\/live-infoblox-blog.pantheonsite.io\/?p=3101"},"modified":"2020-05-06T10:30:14","modified_gmt":"2020-05-06T17:30:14","slug":"deploy-ipv6-now-but-you-will-still-experience-the-ipv4-address","status":"publish","type":"post","link":"https:\/\/www.infoblox.com\/blog\/ipv6-coe\/deploy-ipv6-now-but-you-will-still-experience-the-ipv4-address\/","title":{"rendered":"Deploy IPv6 Now, But You Will Still Experience the IPv4 Address Shortage"},"content":{"rendered":"

IPv6 Versus IPv4 is Not an Either\/Or Situation<\/strong><\/p>\n

When people first start to contemplate\u00a0IPv6<\/a>, they tend to get the false impression that they must make a full migration from using IPv4 exclusively to using IPv6 exclusively.\u00a0 They believe that their organization has to make a complete \u201cflip-the-switch\u201d cutover from using one protocol to the other.\u00a0 It turns out that\u00a0this is not the case<\/a>.\u00a0 The IETF knew early-on that the migration from using IPv4 to IPv6 would take time and, therefore, they created a variety of\u00a0transition mechanisms<\/a>\u00a0(RFC 4213<\/a>).\u00a0 There were manual and automatic\/dynamic tunneling and translation mechanisms created, however, the predominant migration strategy was a dual-stack implementation.\u00a0 This is where both protocols are run in parallel for some time and then, eventually, IPv4 might be turned off at some point.\u00a0 Organizations will make their systems \u201cbilingual\u201d by adding IPv6 to the existing IPv4 network, run both protocols for many years then eventually start to pare back their IPv4 network, eventually leaving an IPv6-only network.<\/p>\n

IPv4 Address Exhaustion Has Occurred<\/strong><\/p>\n

Meanwhile as organizations work on deploying IPv6 onto their networked environments,\u00a0IPv4 address depletion<\/a>\u00a0is continuing.\u00a0 The Regional Internet Registries (RIRs) have differing policies about how each of them has managed their finite IPv4 address resources and handled address allocations.\u00a0 Geoff Huston\u2019s \u201cRIR IPv4 Address Run-Down Model<\/a>\u201d graph has been referenced frequently over the past decade.\u00a0\u00a0APNIC<\/a>\u00a0and\u00a0RIPE<\/a>\u00a0are already in an IPv4 address depletion situation.\u00a0 The\u00a0LACNIC<\/a>\u00a0region has experienced tremendous Internet growth and has exhausted their supply of addresses.\u00a0 It is expected that\u00a0ARIN<\/a>\u00a0run-out will occur sometime middle of this year.\u00a0\u00a0AFRINIC<\/a>\u00a0still has a supply of addresses that should satisfy demand for a few more years.<\/p>\n

IPv6 Deployment Continues<\/strong><\/p>\n

The good news is that the use of IPv6 has been growing substantially over the past five years.\u00a0 One look at the Google\u00a0IPv6 Statistics \u2013 IPv6 Adoption<\/a>\u00a0graph shows the use of IPv6 from their vantage point.\u00a0 From this graph, it appears that IPv6 usage has been doubling every year.\u00a0 However, the vast majority of Internet traffic is still IPv4 and the vast majority of the Alexa 1M still use IPv4 only.\u00a0 The Hurricane Electric \u201cGlobal IPv6 Deployment Progress Report<\/a>\u201d states that while 19% of ASNs are advertising IPv6 routes, only 6% to 7% of web sites are running both IP protocols.\u00a0 From this data, we can conclude that if anyone wants to access the Internet, they will be unable to reach most destinations using an IPv6-only configuration.<\/p>\n

No Plans to Turn Off IPv4<\/strong><\/p>\n

Internet Service Providers and large enterprises are struggling with how they will continue their IPv4 operations for the indefinite future.\u00a0 The vast majority of organizations will need to continue their IPv4 usage for the next ten to twenty years.\u00a0 There are many IPv4-only systems within buildings and data-centers that will not be aged-out rapidly.\u00a0 Virtually all organizations have no current plans to disable IPv4.\u00a0 Therefore, organizations should ask themselves: Do we have enough IPv4 addresses to sustain our business for the next ten years?\u00a0 How do you even know what networking will be like in ten years from now?<\/p>\n

Feeling the IPv4 Address Crunch<\/strong><\/p>\n

There are many organizations that are running out of public IPv4 addresses and are starting to feel the crunch.\u00a0 Some very-large organizations are even running out of private addresses (RFC 1918<\/a>) inside of their NATed environments.\u00a0 It is not uncommon for organizations to divide up their 10.0.0.0\/8-space into \/28s and smaller subnets.\u00a0\u00a0IPv4 prefix lengths<\/a>\u00a0are getting smaller and smaller.\u00a0 If your organization is either running out of public IPv4 addresses or starting to run out of private IPv4 address space, you are already behind the proverbial 8-ball.\u00a0 Most service providers will have no choice but to use some form of Carrier-Grade NAT\/Large-Scale NAT (CGN\/LSN<\/a>) in the coming years, even though it may negatively impact applications (RFC 7021<\/a>).\u00a0 As\u00a0Lee Howard<\/a>\u00a0and Wesley George from Time Warner Cable have said, \u201cTherefore the best method to reduce the cost of Carrier-Grade NAT (CGN) deployment is to work to dep…<\/a>\u201d<\/p>\n

IPv6 Deployment Won\u2019t Help Your Near-Term IPv4 Crisis<\/strong><\/p>\n

All organizations should come to the conclusion that they must act quickly to deploy IPv6.\u00a0 The faster they deploy IPv6, the sooner they might be able to switch some systems to using IPv6-only.\u00a0 Any system that can be migrated to IPv6-only will have a benefit of freeing up an IPv4 address.\u00a0 For example, moving\u00a0cable modem management<\/a>\u00a0to IPv6-only saves cable broadband providers IPv4 addresses that could be used for other purposes.<\/p>\n

It is conceivable that an organizations can try to aim to hit the sweet spot on the graph where IPv4 connectivity starts to get really bad, and IPv6 deployment\/implementation is starting to become more ubiquitous.\u00a0 Aiming for that point is a bit like steering the\u00a0Millennium Falcon<\/a>\u00a0through a narrow gap between two asteroids.<\/p>\n

\"IPv6<\/p>\n

For most organizations, the slow rate with which they are deploying IPv6 will initially have no effect on their increasing short-term need for IPv4 addresses.\u00a0 Their systems will need to be deployed using both IPv4 and IPv6 to maintain\u00a0dual-protocol<\/a>\u00a0connectivity and facilitate connectivity to the largest population of clients.\u00a0 Failure to deploy IPv6 will only make things worse and only delay the inevitable.\u00a0 Those organizations that are on the tail-end of the bell curve of companies deploying IPv6 will experience fear, anger, hate, suffering, and eventually,\u00a0the dark side<\/a>.<\/p>\n

The best approach is to aggressively deploy IPv6 in an effort to try to reduce the duration your organization spends running two Internet Protocols.\u00a0 As more IPv6-capable systems come online, your organization will already be ready to take advantage of that.\u00a0 Being on the leading edge of the bell curve of companies deploying IPv6 puts your organization in an advantageous position that\u00a0reduces operating expenses<\/a>\u00a0and your dependence on IPv4 sooner.<\/p>\n","protected":false},"excerpt":{"rendered":"

IPv6 Versus IPv4 is Not an Either\/Or Situation When people first start to contemplate\u00a0IPv6, they tend to get the false impression that they must make a full migration from using IPv4 exclusively to using IPv6 exclusively.\u00a0 They believe that their organization has to make a complete \u201cflip-the-switch\u201d cutover from using one protocol to the other.\u00a0 […]<\/p>\n","protected":false},"author":321,"featured_media":2788,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[17],"tags":[16,38,15],"class_list":{"0":"post-3101","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-ipv6-coe","8":"tag-infoblox","9":"tag-ipv6","10":"tag-security","11":"entry"},"acf":[],"yoast_head":"\nDeploy IPv6 Now, But You Will Still Experience the IPv4 Address Shortage<\/title>\n<meta name=\"description\" content=\"When people first start to contemplate IPv6, they tend to get the false impression that they must make a full migration from using IPv4 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Scott Hogg specializes in teaching Internet Protocol version 6 (IPv6) and providing implementation guidance. Scott is CCIE #5133 (Emeritus) and CISSP #4610. Scott is Chair Emeritus of the Rocky Mountain IPv6 Task Force (RMv6TF), a member of the IPv6 Center of Excellence (COE), and co-author of the Cisco Press book on IPv6 Security.","sameAs":["https:\/\/hexabuild.io"],"url":"https:\/\/www.infoblox.com\/blog\/author\/scott-hogg\/"}]}},"_links":{"self":[{"href":"https:\/\/www.infoblox.com\/blog\/wp-json\/wp\/v2\/posts\/3101","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.infoblox.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.infoblox.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.infoblox.com\/blog\/wp-json\/wp\/v2\/users\/321"}],"replies":[{"embeddable":true,"href":"https:\/\/www.infoblox.com\/blog\/wp-json\/wp\/v2\/comments?post=3101"}],"version-history":[{"count":3,"href":"https:\/\/www.infoblox.com\/blog\/wp-json\/wp\/v2\/posts\/3101\/revisions"}],"predecessor-version":[{"id":3781,"href":"https:\/\/www.infoblox.com\/blog\/wp-json\/wp\/v2\/posts\/3101\/revisions\/3781"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.infoblox.com\/blog\/wp-json\/wp\/v2\/media\/2788"}],"wp:attachment":[{"href":"https:\/\/www.infoblox.com\/blog\/wp-json\/wp\/v2\/media?parent=3101"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.infoblox.com\/blog\/wp-json\/wp\/v2\/categories?post=3101"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.infoblox.com\/blog\/wp-json\/wp\/v2\/tags?post=3101"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}