Internet Routing TableAnalysis UpdatePhilip SmithAfNOG 2011Dar Es Salaam, Tanzania7 June 2011Motivation! 1998: No one was publishing any Internetrouting table analysis! Only CIDR-Report reporting on top 20 contributorsto routing table, and top 20 bad aggregators! With support of APNIC, my weekly reportingreport started 23rd February 1999:! Routing table size! CIDR-Report style reporting on a per-RIR basis! and many other interesting featuresRouting Report 4 June 2011BGP routing table entries examined:358561Prefixes after maximum aggregation:162439Deaggregation factor:2.21Unique aggregates announced to Internet: 178183Total ASes present in the Internet Routing Table: 37775Prefixes per ASN:9.49Origin-only ASes present in the Internet Routing Table: 31544Origin ASes announcing only one prefix: 15151Transit ASes present in the Internet Routing Table:5102Transit-only ASes present in the Internet Routing Table:134Average AS path length visible in the Internet Routing Table: 4.3Max AS path length visible:36Max AS path prepend of ASN (48687) 24Prefixes from unregistered ASNs in the Routing Table: 747Unregistered ASNs in the Routing Table: 395Number of 32-bit ASNs allocated by the RIRs: 1425Number of 32-bit ASNs visible in the Routing Table:1129Prefixes from 32-bit ASNs in the Routing Table:2579Special use prefixes present in the Routing Table:0Prefixes being announced from unallocated address space:165Number of addresses announced to Internet: 2450918336Equivalent to 146 /8s, 22 /16s and 11 /24sPercentage of available address space announced: 66.1Percentage of allocated address space announced: 66.1Percentage of available address space allocated:100.0Percentage of address space in use by end-sites: 91.0Total number of prefixes smaller than registry allocations:149599Growth slowed down4-byte ASNs appearAfriNIC RegionPrefixes being announced by AfriNIC Region ASes: 7999Total AfriNIC prefixes after maximum aggregation:1909AfriNIC Deaggregation factor:4.19Prefixes being announced from the AfriNIC address blocks:6308Unique aggregates announced from the AfriNIC address blocks: 1917AfriNIC Region origin ASes present in the Internet Routing Table: 458AfriNIC Prefixes per ASN: 13.77AfriNIC Region origin ASes announcing only one prefix:142AfriNIC Region transit ASes present in the Internet Routing Table:100Average AfriNIC Region AS path length visible:4.8Max AfriNIC Region AS path length visible: 24Number of AfriNIC region 32-bit ASNs visible in the Routing Table:5Number of AfriNIC addresses announced to Internet: 23586048Equivalent to 1 /8s, 103 /16s and 229 /24sPercentage of available AfriNIC address space announced: 35.1AfriNIC AS Blocks36864-37887, 327680-328703 & ERX transfersAfriNIC Address Blocks41/8, 102/8, 105/8, 197/8Global per AS prefix count summary ASN No of nets/20 equivMax Agg Description 6389 3641 3822 256 bellsouth.net, inc. 4766 2460 9500 922 Korea Telecom (KIX) 4323 1973 1081 400 Time Warner Telecom18566 1875355 269 Covad Communications 1785 1790681 122 PaeTec Communications, Inc. 6478 171631845 AT&T Worldnet Services20115 1535 1540 633 Charter Communications17974 154144138 PT TELEKOMUNIKASI INDONESIA 7545 153730186 TPG Internet Pty Ltd10620 1512278 157 TVCABLE BOGOTA19262 1492 4936 307 Verizon Global Networks 4755 1470634 166 TATA Communications formerly 7018 1367 7068 892 AT&T WorldNet Services 8151 1383 2724 364 UniNet S.A. de C.V.22773 1337 289788 Cox Communications, Inc.28573 131999286 NET Servicos de Comunicao S.A 2386 1268536 911 AT&T Data Communications Serv 7011 1160274 693 Citizens Utilities11492 115323587 Cable One24560 1155337 187 Bharti Airtel Ltd., TelemediaGlobal Aggregation Savings Summary ASNNo of NetsNet SavingsDescription 647817161671AT&T Worldnet Services 178517901668PaeTec Communications, Inc.1856618751606Covad Communications 432319731573Time Warner Telecom 476624601538Korea Telecom (KIX)1797415411503PT TELEKOMUNIKASI INDONESIA 754515371451TPG Internet Pty Ltd1062015121355TVCABLE BOGOTA 475514701304TATA Communications formerly2277313371249Cox Communications, Inc.2857313191233NET Servicos de Comunicao S.A1926214921185Verizon Global Networks 755211411134Vietel Corporation1149211531066Cable One 815113831019UniNet S.A. de C.V.245601155 968Bharti Airtel Ltd., Telemedia201151535 902Charter Communications 9829 956 874BSNL National Internet Backbo17488 930 826Hathway IP Over Cable Interne 8452 833 822TEDATAGlobal Per AS Maximum Aggregation % summaryASN No of nets% Savings Description 7552114199Vietel Corporation 8452 83399TEDATA15475 54499Nile Online 3505 16899Vnet Internet Access, Inc.264638599Macomb Intermediate School Di 34497699Universidad de Buenos Aires554307399Starhub Internet Pte Ltd238516899Chongqing Broadband Network C17974154198PT TELEKOMUNIKASI INDONESIA30693 50698Eonix Corporation12479 43298Uni2 Autonomous System35819 38198Bayanat Al-Oula Autonomous Sy27747 26098Telecentro S.A. 5786 18498University of Puerto Rico38264 14398Wateen National WiMAX/IMS688 13198Department of Interior260819098American Long Lines459518198Augere Wireless Broadband Bangladesh228458098Michigan Connect, LLC241878098KIRZ AS ISP Bangkok ThailandNumber of prefixes announced by prefix length /1:0/2:0/3:0/4:0/5:0/6:0 /7:0/8:19 /9:10/10:22/11:58/12:167/13:347 /14:602 /15:1153/16:10475 /17:4717/18:8078/19:16918 /20:20092 /21:19903 /22:25822 /23:25632 /24:151077/25:842 /26:1001/27:545 /28:142 /29:8 /30:5/31:0 /32:8Number of prefixes announced by prefix length /1:0/2:0/3:0/4:0/5:0/6:0 /7:0/8:20 /9:12/10:28/11:81/12:228/13:461 /14:798 /15:1395/16:11917 /17:5834/18:9733/19:19342 /20:25663 /21:25940 /22:34114 /23:33063 /24:186681/25:1084/26:1275/27:711 /28:165 /29:8 /30:2/31:0 /32:6June 2011 !June 2009 "Prefixes Smaller than Registry AllocationsASN No of netsTotal ann.Description 6389 22433641bellsouth.net, inc.18566 18381875Covad Communications 6478 16701716AT&T Worldnet Services10620 14021512TVCABLE BOGOTA11492 11071153Cable One 7011 10611160Citizens Utilities 1785 10501790PaeTec Communications, Inc. 43238861973Time Warner Telecom227738521337Cox Communications, Inc.285738151319NET Servicos de Comunicao S.A 70187651367AT&T WorldNet Services22561755 928Digital Teleport, Inc 7029747 990Alltel Information Services,13407724 771Computer Telephone Corp 33567061106Level 3 Communications, LLC 7303690 960Telecom Argentina Stet-France 8452632 833TEDATA 47666272460Korea Telecom (KIX)14420617 675CORPORACION NACIONAL DE TELEC192626061492Verizon Global NetworksJune 2011Total Prefixes! Global BGP Table! 359k prefixes! Europe & Middle East! 85k prefixes! North America! 141k prefixes! Asia & Pacific! 89k prefixes! Africa! 8k prefixes! Latin America & Caribbean! 44k prefixesDeaggregation Factor! Global Average! 2.21! Europe & Middle East! 1.76! North America! 1.97! Asia & Pacific! 2.95! Africa! 4.19! Latin America & Caribbean! 4.40Africa Aggregation Savings Summary ASNNo of Nets Savings Description 8452 833 822TEDATA24863 721 684LINKdotNET AS number15475 544 536Nile Online36992 294 280Etisalat MISR 6713 241 228Itissalat Al-MAGHRIB33776 218 207Starcomms Nigeria Limited24835 208 198RAYA Telecom - Egypt29571 193 181Ci Telecom Autonomous system15706 130 125Sudatel Internet Exchange Aut29975 133 116Vodacom36874 123 116Cybersmart37061 10299One Communications Ltd153997874Wananchi Online Limited370548972Data Telecom Service209287169Noor Advanced Technologies AS16637 15064MTN Network Solutions238897651MAURITIUS TELECOM371345251Mobitel Nigeria Limited369235349Swift Networks Limited 80945047PUKNEThttp://thyme.apnic.net/current/data-CIDRnet-AFRINICInternet Routing TableAnalysis UpdateQuestions?