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INTERNET MEASUREMENT INTERNET MAPPING OVERHEAD MINIMIZATION  Intra- and inter-monitor redundancy reduction IBRAHIM ETHEM COSKUN University of Nevada,

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Presentation on theme: "INTERNET MEASUREMENT INTERNET MAPPING OVERHEAD MINIMIZATION  Intra- and inter-monitor redundancy reduction IBRAHIM ETHEM COSKUN University of Nevada,"— Presentation transcript:

1 INTERNET MEASUREMENT INTERNET MAPPING OVERHEAD MINIMIZATION  Intra- and inter-monitor redundancy reduction IBRAHIM ETHEM COSKUN University of Nevada, Reno M.Sc.

2  Intra –monitor redundancy  Occurs when all traceroutes start from a single point  Inter –monitor redundancy  Occurs when multiple monitors visit the same point INTRA AND INTER –MONITOR REDUNDANCY

3 INTRA –MONITOR REDUNDANCY Monitor 1 Destination 1 Destination 2 Destination 3

4 INTER –MONITOR REDUNDANCY Monitor 1 Monitor 2 Monitor 3 Destination 1

5  PlanetLab currently consists of 1187 nodes at 582 sites  AS numbers of 1047 nodes collected  111 nodes not responded Planetlab VPs

6

7

8  Archipelago (Ark for short) is CAIDA's next- generation active measurement infrastructure  AS numbers of 91 nodes collected Ark VPs

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10  RIPE NCC is building the largest Internet measurement network ever made  AS numbers of 5373 Nodes collected  2025 different ASes RIPE NCC VPs

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12

13 TOTAL (collected) ASN Information

14  Data downloaded from CAIDA  788.688 AS relation  Compared with collected ASes which includes VPs (Ark, Planetlab, RIPE NCC) ASN Neighboring Relations

15  ~500 available nodes, ~350 usable  Probed 3 hops of each VP  45000 ASes in average  Selected 1 IP per AS  394387 ingress points identified  Gathered peering relations  74302 identified (One AS to another) Planetlab Vantage Points

16  traceroute to 223.253.8.1 (223.253.8.1), 30 hops max, 60 byte packets 1 134.197.43.254 [AS3851/AS22911] 0.500 ms 0.964 ms 1.205 ms 2 10.252.1.245 [AS65534] 0.203 ms 0.434 ms 10.251.1.245 [AS65534] 0.184 ms 3 10.255.2.250 [AS65534] 0.907 ms 0.890 ms 10.255.1.250 [AS65534] 0.879 ms 4 134.197.0.9 [AS3851/AS22911] 1.118 ms 1.099 ms 1.090 ms 5 207.197.33.69 [AS3851] 1.082 ms 1.471 ms 1.461 ms 6 137.164.23.37 [AS2152] 4.360 ms 4.267 ms 4.261 ms 7 137.164.46.80 [AS2152] 4.289 ms 4.262 ms 4.303 ms 8 137.164.47.22 [AS2152] 6.807 ms 8.088 ms 6.773 ms 9 137.164.47.18 [AS2152] 7.586 ms 7.571 ms 7.562 ms 10 198.32.176.43 [AS4637] 22.041 ms 22.030 ms 22.014 ms 11 1.208.104.201 [AS55831] 22.007 ms 203.255.234.133 [AS3786] 21.561 ms 203.255.234.145 [AS3786] 21.547 ms 12 203.233.37.73 [AS3786] 166.076 ms 203.233.52.33 [AS3786] 165.376 ms 1.208.104.93 [AS55831] 166.261 ms 13 210.120.105.214 [AS3786] 167.341 ms 167.319 ms 1.208.107.218 [AS55831] 167.291 ms 14 211.53.168.214 [AS3786] 163.802 ms 168.335 ms 169.086 ms 15 124.243.3.221 [AS9842] 168.662 ms 168.297 ms 163.744 ms 16 223.253.3.29 [AS9842] 162.751 ms 157.928 ms 157.629 ms 17 223.253.3.6 [AS9842] 173.304 ms 173.295 ms 169.098 ms 18 223.253.8.1 [AS9842] 171.442 ms 177.999 ms 166.311 ms IGRESS POINT IDENTIFICATION

17 #Ingresses - #ASes

18  Pick 12 ASes  Based on:  Sizes (#IPs), #Observed IPs, #Peers, Ranks  1 small, 1 medium, 1 large  Probe these ASes from each VP AS ingress analysis

19 #CONNECTIONS#PEERS 129563 212917 37347 44889 53319 62529 71920 81528 91208 101019 11870 12755 13621 14548 15464 16398 17296 18312 #Peers - #Connections ASN1ASN2#CONNECTIONS 17433561824 12993356803 33563549780 174701627 1743257600 63897018585 33563257539 784310796496 209701466 64534755462 174209460 2914174433 7013549422 354918881399 7018701393 1747922363 3356701361 1741299339 33564323330 2828174328 64534323323

20 #Peers - #Connections

21  223.239.208.0/20 AS45609 BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service,IN  223.239.240.0/20 AS45609 BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service,IN  223.248.0.0/16 AS9812 CNNIC-CN-COLNET Oriental Cable Network Co., Ltd.,CN  223.249.0.0/16 AS9812 CNNIC-CN-COLNET Oriental Cable Network Co., Ltd.,CN  223.250.0.0/16 AS9812 CNNIC-CN-COLNET Oriental Cable Network Co., Ltd.,CN  223.251.0.0/16 AS9812 CNNIC-CN-COLNET Oriental Cable Network Co., Ltd.,CN  223.252.160.0/24 AS58779 I4HKLIMITED-AS i4HK Limited,HK  223.252.161.0/24 AS58779 I4HKLIMITED-AS i4HK Limited,HK AS Sizes Data: http://www.cidr-report.org/as2.0/msprefix-list.html

22  #/32: 1 IP address within the subnet #/31: 2 IP addresses within the subnet #/30: 4 IP addresses within the subnet #/29: 8 IP addresses within the subnet #/28: 16 IP addresses within the subnet #/27: 32 IP addresses within the subnet #/26: 64 IP addresses within the subnet #/25: 128 IP addresses within the subnet #/24: 256 IP addresses within the subnet #/23: 512 IP address within the subnet #/22: 1024 IP addresses within the subnet #/21: 2048 IP addresses within the subnet #/20: 4096 IP addresses within the subnet #/19: 8192 IP addresses within the subnet #/18: 16384 IP addresses within the subnet #/17: 32768 IP addresses within the subnet #/16: 65536 IP addresses within the subnet #/15: 131072 IP addresses within the subnet #/14: 262144 IP address within the subnet #/13: 524288 IP addresses within the subnet #/12: 1048576 IP addresses within the subnet #/11: 2097152 IP addresses within the subnet #/10: 4194304 IP addresses within the subnet #/9: 8388608 IP addresses within the subnet #/8: 16777216 IP addresses within the subnet AS Sizes IP prefixes, #IPs

23  Announced Prefixes:  …../24  …../16  …../8 /24 /24 /16 /8 /8 How to calculate AS size 256 6553616777216 + ++ + = 33620480 SIZE

24 AS Rank Data: http://as-rank.caida.org/

25  Ingress point analysis  VP analysis How to reduce redundant probing?

26  Pick 2 IPs from each prefix  First IP, Last IP  1.0.4.0/24 Ingress Analysis - Probing Mechanism 1.0.4.11.0.4.254 Probe these IPs If they enter the AS from the same ingress, then that means all IPs in this /24 subnet belongs to the same ingress. If they reveal different ingress points, then divide the prefix by 2 and continue probing each subnet.

27 Ingress Analysis - Probing Mechanism 1.0.4.0 First IP: 1.0.4.1 Last IP: 1.0.4.254 First IP: 1.0.4.1 Last IP: 1.0.4.126 First IP: 1.0.4.129 Last IP: 1.0.4.254 /24 Divide: 1.0.4.0 /25 || 1.0.4.128 /25 Ingress A Done! Ingress A Ingress B Continue Done! Ingress A Done! Ingress B 1.0.4.0 /25 Ingress B 1.0.4.128 /25 Ingress A

28  Which subnets reached by which ingresses  Which VPs enter the target AS through which ingresses  How much data we lose from recalling a VP or multiple VPs  How many hops VPs traverse to trace these ASes  Which VPs would be enough to trace an AS and not to cause redundant probing. Analysis

29 VP analysis Target AS Ingress router VP Target AS Other ASes

30 ? QUESTIONS?

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