Network-side Happy Eyeballs based on accurate IPv6 measurement

Document Type Expired Internet-Draft (individual)
Last updated 2019-05-29 (latest revision 2018-11-25)
Replaces draft-v6ops-xie-network-happyeyeballs
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


During the period of IPv6 transition, both ISPs and ICPs (Internet Content Providers) care about user's experience in dual-stack networks. They hesitate to provide IPv6 to their users due to the fear of poor IPv6 performance. Network-based Happy Eyeballs (NHE) is proposed in this memo as an approach to facilitate ISPs to identify IPv6 connectivity issues and provide better connectivity to end users. NHE does accurate measurements and comparison on IPv6/IPv4 performance on the network side compared with client-side as in Happy Eyeballs v2 (HEv2) [RFC8305]. It works independently with client's adoption of HEv2 and both coexist without conflicting. REMOVE BEFORE PUBLICATION: The source of the document with test script is currently placed at GitHub [NHE-GitHub]. Comments and pull request are welcome.


Chongfeng Xie (
Linjian Song (
Jordi Palet (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)