Cisco Public 1© 2014 Cisco and/or its affiliates. All rights reserved.

IPv6 performance bonus?Eric VYNCKE, Cisco, evyncke@cisco.comMarcel ENGUEHARD, École Polytechnique

September 2014

© 2014 Cisco and/or its affiliates. All rights reserved. Cisco Pubic 2

Web probe to web servers

HTTP HEAD request

TCPDUMP+

Java

© 2014 Cisco and/or its affiliates. All rights reserved. Cisco Pubic 3

Web probe to web servers: locations

© 2014 Cisco and/or its affiliates. All rights reserved. Cisco Pubic 4

Measurement results: global results

Distribution of log( ) for each source-destination pair from our web probe

© 2014 Cisco and/or its affiliates. All rights reserved. Cisco Pubic 6

Measurement results: HE effect• HE: most important IPv6 backbone provider

• Routeview.org Ashburn’s router BGP table presence of AS6939:44,8% of the IPv6 routes

16,9% of the IPv4 routes

Hurricane Electric’s network map

© 2014 Cisco and/or its affiliates. All rights reserved. Cisco Pubic 7

Measurement results: HE effect in Singapore

RTT distribution from Singapore to mail.de (in µs)Paths in IPv4 and IPv6 from Singapore to mail.de

© 2014 Cisco and/or its affiliates. All rights reserved. Cisco Pubic 8

Measurement results: Non-congruent routing• Geographically incoherent routing

Path taken on AS6453 (TATA Comm.) by a TCP connection between our Rackspace server and e-foia.uspto.govDistribution of IPv4 and IPv6 RTTs (in µs) between our server in Virginia and

e-foia.uspto.gov

© 2014 Cisco and/or its affiliates. All rights reserved. Cisco Pubic 9

Time to improve BGP routing and peering• BGP peering is not optimal, either in v4 or v6

Lots of Ases are happy enough to peer with only 2 or 3 tier 1 backbone providers

Peering agreements are specific to v6

• Specific ASes’ topology influence routing too muchParticularly in intercontinental connections

Thank you.