IPv4 vs IPv6 – Happy Eyeballs.pdf

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“IPv4 vs IPv6

IPv4 vs. IPv6

– Happy Eyeballs”

Happy Eyeballs

Krzysztof Mazepa

IP NGN S

IP NGN Systems Architect

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PLNOG, Kraków 22-23 październik 2012

© 2011 Cisco and/or its affiliates. All rights reserved.

Cisco Confidential

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• Increased availability of IPv6 access causes that more and more

people turn on IPv6 stack at their laptops and computers. It

people turn on IPv6 stack at their laptops and computers. It

happens that IPv6 network performance is for some reason worse

than one that towards to IPv4 site. A browser or operating system

prefers particular address family regardless of network

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performance and the end site availability very often . That causes

connection timeouts and results in an assumption that there is

“something wrong” with IPv6.

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• This session attempts to explain a mechanism that causes that

behavior, it also promotes Happy Eyeballs algorithm that was

implemented in particular operating systems

implemented in particular operating systems …

© 2011 Cisco and/or its affiliates. All rights reserved.

Cisco Confidential

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© 2011 Cisco and/or its affiliates. All rights reserved.

Cisco Confidential

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• Dual stack: the problem of address family selection

• The Happy Eyeballs solution

• Implementaitons of Happy Eyeballs

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Firefox and Chrome

Apple OSX, iOS, Safari

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,

,

• Windows 8 IPv6 NCSI

• IPv6 traffic impact

IPv6 traffic impact

© 2011 Cisco and/or its affiliates. All rights reserved.

Cisco Confidential

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© 2011 Cisco and/or its affiliates. All rights reserved.

Cisco Confidential

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