9/20/2023 0 Comments Happy eyeballs![]() ![]() (If this is not solved, theĭual-stack approach is no better than the packet translationĪs discussed in more detail in Section 3.1, it is important that theĪs discussed in more detail in Section 3.2, IPv6 connectivity isīroken to specific prefixes or specific hosts or is slower than Solution to this must be proposed and it must not depend on IPv4 and IPng addresses gives no information about black holes. Running IPng at a particular moment thus an IPng packet to that Which DNS claims to know an IPng address may in fact not be The DNS does not necessarily correspond to reality. IPv4-only routers which discard IPng packets. IPng host A to IPng host B there will sometimes (unpredictably) be The dual-stack code may get two addresses back from DNS whichĭoes it use? During the many years of transition the Internet The basis of the IPv6/IPv4 selection problem was first described in RFC 6555 Happy Eyeballs Dual Stack April 2012 3. "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in thisĭocument are to be interpreted as described in. The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", To the slight detriment of the network, DNS server, and server that Load from IPv4 networks and, most importantly, to reduce the load on Still giving IPv6 a slight preference over IPv4 (in order to remove The procedures described in this document retain a quality userĮxperience while transitioning from IPv4-only to dual stack, while To the preferred address family (usually IPv6) are not completing To the recommendations in this document, especially when connections Preference be honored (e.g., ).Īdditional network traffic and additional server load is created due The network and servers not be inordinately harmed with a simpleĭoubling of traffic on IPv6 and IPv4 and the host's address Specifies requirements for any such algorithm, with the goals that Variety of algorithms that can be envisioned. ![]() More aggressively making connections on IPv6 and IPv4. Instead, applications reduce connection setup delays themselves, by React to intermittent network path outages. ![]() Worldwide or the number of content providers worldwide) and does However, this does not scale well (to the number of DNS servers Service providers who peer directly with them (e.g., ). For IPv6, a content provider mayĮnsure a positive user experience by using a DNS white list of IPv6 Providers, and some of today's content providers all cause the userĮxperience to suffer ( Section 3). AĬombination of today's applications, IPv6 tunneling, IPv6 service In order to use applications over IPv6, it is necessary that usersĮnjoy nearly identical performance as compared to IPv4. RFC 6555 Happy Eyeballs Dual Stack April 2012 1. ![]() RFC 6555 Happy Eyeballs Dual Stack April 2012ġ. The Trust Legal Provisions and are provided without warranty as Include Simplified BSD License text as described in Section 4.e of Code Components extracted from this document must Please review these documentsĬarefully, as they describe your rights and restrictions with respect This document is subject to BCP 78 and the IETF Trust's Legal Information about the current status of this document, any errata,Īnd how to provide feedback on it may be obtained atĬopyright (c) 2012 IETF Trust and the persons identified as the Internet Standards is available in Section 2 of RFC 5741. Internet Engineering Steering Group (IESG). Received public review and has been approved for publication by the It represents the consensus of the IETF community. This document is a product of the Internet Engineering Task Force This is an Internet Standards Track document. Specifies requirements for algorithms that reduce this user-visible Stack client to have a worse user experience. This is undesirable because it causes the dual. IPv6 path and protocol are not working, a dual-stack clientĪpplication experiences significant connection delay compared to an When a server's IPv4 path and protocol are working, but the server's Happy Eyeballs: Success with Dual-Stack Hosts RFC 6555: Happy Eyeballs: Success with Dual-Stack Hosts Įrrata Exist Internet Engineering Task Force (IETF) D. ![]()
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