1. World IPv6 Day -
What did we learn?
emile.aben@ripe.net
APNIC 32

2. RIPE NCC Measurements - World IPv6 Day
• IPv6 Eyechart and 6to4 (not in this talk)
• Active measurements
– Sources: 40 vantage points (RIPE TTM, CAIDA Ark, ...)
– Destinations: 53 participant or already dual-stacked
sites
– From 2011-06-01 to 2011-06-11 we measured
– DNS: A and/or AAAA records
– ping(6)/traceroute(6)
– HTTP over IPv4 and IPv6
Emile Aben, APNIC 32 2

3. Measurement vantage points
Emile Aben, APNIC 32 3

4. Lesson:
Control

5. When did World IPv6 Day start?
• Less then 2 days before World IPv6 Day:
DNS negative caching for websites participating in World IPv6 Day
90
Number of participating websites
80
70
60
50
40
30
20
10
0
1m 2m 5m 10m 20m 1h 2h 5h 10h 1d 2d
minimum of: minimum TTL in SOA, TTL of SOA
Emile Aben, APNIC 32 5

6. Percentage of vantage points seeing AAAA
v6day
Emile Aben, APNIC 32 6

7. Percentage of vantage points seeing AAAA
v6day
Negative caching
Emile Aben, APNIC 32 6

8. Percentage of vantage points seeing AAAA
v6day
TTL caching
Negative caching
Emile Aben, APNIC 32 6

9. Control - lessons learned
• Know your on/off switch
– Control your DNS
• Set low TTL in case of
roll-back
• Set low negative TTL
– Bymeans of minTTL in
SOA / TTL of SOA
Emile Aben, APNIC 32 7

10. Lesson:
Test and monitor

11. You don’t want this to happen
On IPv4:
On IPv6:
Emile Aben, APNIC 32 9

12. Or this ...
Comparing DNS,ping and HTTP IPv6 measurements
to www.commerce.gov from 2011-06-09 0:00 UTC to 2011-06-10 12:00 UTC
100 %
% AAAA queries returning an IPv6 address
% HTTP responses == 200
80 % % ICMPv6 ping success
60 %
40 %
20 %
0%
00
04
08
12
16
20
00
04
08
12
:0
:0
:0
:0
:0
:0
:0
:0
:0
:0
0
0
0
0
0
0
0
0
0
0
Emile Aben, APNIC 32 10

13. Or this ...
Comparing DNS,ping and HTTP IPv6 measurements
to www.commerce.gov from 2011-06-09 0:00 UTC to 2011-06-10 12:00 UTC
100 %
% AAAA queries returning an IPv6 address
% HTTP responses == 200
80 % % ICMPv6 ping success
60 %
40 %
20 %
0%
00
04
08
12
16
20
00
04
08
12
:0
:0
:0
:0
:0
:0
:0
:0
:0
:0
0
0
0
0
0
0
0
0
0
0
v6 on www turned off
at end of v6day
Emile Aben, APNIC 32 10

14. Or this ...
Comparing DNS,ping and HTTP IPv6 measurements
to www.commerce.gov from 2011-06-09 0:00 UTC to 2011-06-10 12:00 UTC
100 %
% AAAA queries returning an IPv6 address
% HTTP responses == 200
80 % % ICMPv6 ping success
60 %
40 %
20 %
0%
00
04
08
12
16
20
00
04
08
12
:0
:0
:0
:0
:0
:0
:0
:0
:0
:0
0
0
0
0
0
0
0
0
0
0
v6 on www turned off but v6 service still
at end of v6day announced
Emile Aben, APNIC 32 10

15. Test and monitor - lessons learned
Emile Aben, APNIC 32 11

16. Test and monitor - lessons learned
• Test when deploying something
– The more real-life, the less likely you !@#$-ed up
• Monitor your infrastructure
• People2people reachability
– Avoidable situations like Level3 and Dept. Commerce
– Contact info up to date in RIR databases (whois)
– Monitor the web (NANOG, *NOG, Twitter, ...)
Emile Aben, APNIC 32 11

17. Global view

18. Performance of src/dst pairs on 2011-06-08
Distribution of IPv4/IPv6 relative performance
• Bell-shaped
IPv4 performs better IPv6 performs better
– centered around 0
– with fatter IPv4-side
• Dual-stack = two
Frequency
chances for best
performance!
– Real-time apps can
exploit this
(voice, gaming)
+ 400 %
+ 350 %
+ 300 %
+ 250 %
+ 200 %
+ 150 %
+ 100 %
+ 50 %
+ 40 %
+ 30 %
+ 20 %
+ 10 %
+0%
+ 10 %
+ 20 %
+ 30 %
+ 40 %
+ 50 %
+ 100 %
+ 150 %
+ 200 %
+ 250 %
+ 300 %
+ 350 %
+ 400 %
best performing protocol, as percentage−wise increase over the least performing protocol
Emile Aben, APNIC 32 13

19. Partial Reachability
• Internet is a collection of interconnecting
networks, and can be different on IPv4/IPv6
• For some of our vantage points, not all
destinations were reachable
– Are our vantage points representative?
– Network partitioning, examples we encountered:
– Level3 - Hurricane Electric
– Cogent - Hurricane Electric
– See http://en.wikipedia.org/wiki/Comparison_of_IPv6_support_by_major_transit_providers
Emile Aben, APNIC 32 14

20. Long term effects - Content
Percentage of web sites in Alexa 1M that can be reached over IPv6
4%
Alexa 1M
3.5 % Alexa top 25k
3%
2.5 %
2%
1.5 %
1%
0.5 %
0% 2 20 20 20 20 20 20 20 20
01 11 11 11 11 11 11 11 11
1- -0 -0 -0 -0 -0 -0 -0 -0
01 2 3 4 5 6 7 8 9
Raw data: Dan Wing
(http://banjo.employees.org/~dwing/aaaa-stats.html)
Emile Aben, APNIC 32 15

21. Long term effects - Content
Percentage of web sites in Alexa 1M that can be reached over IPv6
4% 8 June:
Alexa 1M
3.5 % Alexa top 25k 3.8%
3%
2.5 %
2%
1.5 %
1%
0.5 %
0% 2 20 20 20 20 20 20 20 20
01 11 11 11 11 11 11 11 11
1- -0 -0 -0 -0 -0 -0 -0 -0
01 2 3 4 5 6 7 8 9
Raw data: Dan Wing
(http://banjo.employees.org/~dwing/aaaa-stats.html)
Emile Aben, APNIC 32 15

22. Long term effects - Content
Percentage of web sites in Alexa 1M that can be reached over IPv6
4% 8 June:
Alexa 1M
3.5 % Alexa top 25k 3.8%
3%
2.5 % Pre/post 8 June:
0.4% -> 0.7%
2%
1.5 %
1%
0.5 %
0% 2 20 20 20 20 20 20 20 20
01 11 11 11 11 11 11 11 11
1- -0 -0 -0 -0 -0 -0 -0 -0
01 2 3 4 5 6 7 8 9
Raw data: Dan Wing
(http://banjo.employees.org/~dwing/aaaa-stats.html)
Emile Aben, APNIC 32 15

23. Long term effects - Content
Percentage of web sites in Alexa 1M that can be reached over IPv6
4% 8 June:
Alexa 1M
3.5 % Alexa top 25k 3.8%
3%
2.5 % Pre/post 8 June:
0.4% -> 0.7%
2%
1.5 %
1% Around 3 July:
0.7% -> 1.0%
0.5 %
(Single hoster in DE)
0% 2 20 20 20 20 20 20 20 20
01 11 11 11 11 11 11 11 11
1- -0 -0 -0 -0 -0 -0 -0 -0
01 2 3 4 5 6 7 8 9
Raw data: Dan Wing
(http://banjo.employees.org/~dwing/aaaa-stats.html)
Emile Aben, APNIC 32 15

24. Long term effects - Content
• Linear extrapolation:
–~ an IPv6 year needed to get to 100%
• Exponential extrapolation:
–~ an IPv6 week needed to get to 100%
Emile Aben, APNIC 32 16

25. Long term effects - Content
• Linear extrapolation:
–~ an IPv6 year needed to get to 100%
• Exponential extrapolation:
–~ an IPv6 week needed to get to 100%
• Note: extrapolation based on two data points is
not very scientific :)
Emile Aben, APNIC 32 16

26. Long term effects - IPv6 ASes
12 % 8 June
announcing IPv6 pfx
11.5 %
% of ASes
11 %
10.5 %
10 %
9.5 %
50
Daily increase
40
of IPv6 ASes
30
20
10
0
-10
-20
-30
20
20
20
20
20
20
11
11
11
11
11
11
-04
-05
-06
-07
-08
-09
-01
-01
-01
-01
-01
-01
• Higher growth before v6d: Deployments pushed earlier?
• Lower growth after v6d: Summer-vacation?
• http://v6asns.ripe.net
Emile Aben, APNIC 32 17

27. More information
• Web interface to the measurements
– http://v6day.ripe.net/
• Analysis on RIPE Labs
– http://labs.ripe.net/ipv6day
• Raw data availability
– http://labs.ripe.net/datarepository/data-sets/ripe-ncc-
active-measurements-of-world-ipv6-day-dataset
Emile Aben, APNIC 32 18

28. Conclusions - what we learned
• IPv6/dual-stack works just fine, but make sure
that
– It is properly tested and monitored (like IPv4)
– Your network can reach all others (like IPv4)
• Dual-stack = Two chances for best performance
• Days like this ‘work’
– Raise awareness
– Give people a target to work towards
– We’re ready for a next IPv6(day|week|month|year|∞)
Emile Aben, APNIC 32 19

29. Questions?
질문있습니까?