- routing-wg - mailman.ripe.net

Prefix Size Distribution in multiple flavors, on RIPEstat
by Vesna Manojlovic 07 Aug '12

07 Aug '12

Dear colleagues, thanks to the feedback we received after we've published the interactive widget for querying "RIR prefix size distribution" in RIPEstat, we created a follow-up: a dynamically updated web page that gives an overview of IPv4 address space prefix size distribution, per /8: https://stat.ripe.net/specials/registered-ipv4-prefix-size-distribution This page is updated once a day, and is based on statistics published by all 5 RIRs. Possible usage is general research about the distribution of address space, or prefix filtering based on minimum allocation size. If you want to query any other prefix size, and not only /8, or if you want to query for IPv6 space, here is the link to the widget: https://stat.ripe.net/widget/rir-prefix-size-distribution For the background, please find more information in RIPE Labs article about the widget: https://labs.ripe.net/Members/becha/rir-prefix-size-distribution-in-ripestat Looking forward to your comments or questions, regards, Vesna -- Vesna Manojlovic BECHA(a)ripe.net Senior Community Builder +31205354444 for Measurements Tools RIPE NCC http://ripe.net

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BGP Update Report
by cidr-report＠potaroo.net 04 Aug '12

04 Aug '12

BGP Update Report Interval: 26-Jul-12 -to- 02-Aug-12 (7 days) Observation Point: BGP Peering with AS131072 TOP 20 Unstable Origin AS Rank ASN Upds % Upds/Pfx AS-Name 1 - AS5800 54239 3.2% 205.5 -- DNIC-ASBLK-05800-06055 - DoD Network Information Center 2 - AS8402 45483 2.7% 47.2 -- CORBINA-AS OJSC "Vimpelcom" 3 - AS9829 33335 1.9% 40.9 -- BSNL-NIB National Internet Backbone 4 - AS24560 30641 1.8% 48.3 -- AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services 5 - AS17813 24694 1.4% 239.7 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 6 - AS7552 23873 1.4% 21.4 -- VIETEL-AS-AP Vietel Corporation 7 - AS13118 19067 1.1% 1121.6 -- ASN-YARTELECOM OJSC Rostelecom 8 - AS1637 18305 1.1% 254.2 -- DNIC-AS-01637 - Headquarters, USAISC 9 - AS27065 18027 1.1% 130.6 -- DNIC-ASBLK-27032-27159 - DoD Network Information Center 10 - AS27738 17548 1.0% 31.2 -- Ecuadortelecom S.A. 11 - AS174 14961 0.9% 7.1 -- COGENT Cogent/PSI 12 - AS17974 14924 0.9% 8.4 -- TELKOMNET-AS2-AP PT Telekomunikasi Indonesia 13 - AS7029 12849 0.8% 6.5 -- WINDSTREAM - Windstream Communications Inc 14 - AS28573 11418 0.7% 8.5 -- NET Servicos de Comunicao S.A. 15 - AS13979 10622 0.6% 3.4 -- ATT-IPFR - AT&T Services, Inc. 16 - AS21599 10553 0.6% 3517.7 -- NETDIRECT S.A. 17 - AS45609 10305 0.6% 73.1 -- BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service 18 - AS1502 10103 0.6% 140.3 -- DNIC-ASBLK-01500-01502 - Headquarters, USAISC 19 - AS1562 9890 0.6% 341.0 -- DNIC-ASBLK-01550-01601 - DoD Network Information Center 20 - AS11492 9827 0.6% 42.9 -- CABLEONE - CABLE ONE, INC. TOP 20 Unstable Origin AS (Updates per announced prefix) Rank ASN Upds % Upds/Pfx AS-Name 1 - AS16535 7104 0.4% 7104.0 -- ECHOS-3 - Echostar Holding Purchasing Corporation 2 - AS19406 4284 0.2% 4284.0 -- TWRS-MA - Towerstream I, Inc. 3 - AS21599 10553 0.6% 3517.7 -- NETDIRECT S.A. 4 - AS55534 2715 0.2% 2715.0 -- PPL-PK 4th Floor, PIDC House 5 - AS6197 2565 0.1% 2565.0 -- BATI-ATL - BellSouth Network Solutions, Inc 6 - AS36329 2276 0.1% 2276.0 -- INTRADO - Intrado, Inc. 7 - AS37343 9651 0.6% 1930.2 -- AirtelSeychelles 8 - AS44410 4601 0.3% 1533.7 -- ENTEKHAB-AS ENTEKHAB INDUSTRIAL GROUP 9 - AS13118 19067 1.1% 1121.6 -- ASN-YARTELECOM OJSC Rostelecom 10 - AS36938 995 0.1% 995.0 -- NIRA 11 - AS1273 5448 0.3% 908.0 -- CW Cable and Wireless Worldwide plc 12 - AS38857 1580 0.1% 790.0 -- ESOFT-TRANSIT-AS-AP e.Soft Technologies Ltd. 13 - AS39214 1194 0.1% 597.0 -- COMINTECH Institute of Comunication and Information Technology 14 - AS6410 593 0.0% 593.0 -- ASICOM - ASI COMMUNICATIONS 15 - AS8382 1156 0.1% 578.0 -- IRTEL-AS Irkutsk Central Telegraph autonomous system 16 - AS49072 547 0.0% 547.0 -- APSUARA-AS TCA Apsuara Ltd. 17 - AS22767 1087 0.1% 543.5 -- NASA-ESDIS-NET - National Aeronautics and Space Administration 18 - AS55665 1019 0.1% 509.5 -- STMI-AS-ID PT Sampoerna Telemedia Indonesia 19 - AS29398 484 0.0% 484.0 -- PETROBALTIC "Petrobaltic" S.A. 20 - AS48068 476 0.0% 476.0 -- VISONIC Visonic Ltd TOP 20 Unstable Prefixes Rank Prefix Upds % Origin AS -- AS Name 1 - 109.161.64.0/19 18909 1.0% AS13118 -- ASN-YARTELECOM OJSC Rostelecom 2 - 122.161.0.0/16 11193 0.6% AS24560 -- AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services 3 - 182.64.0.0/16 10861 0.6% AS24560 -- AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services 4 - 200.46.0.0/19 10547 0.6% AS21599 -- NETDIRECT S.A. 5 - 41.79.63.0/24 9620 0.5% AS37343 -- AirtelSeychelles AS45609 -- BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service 6 - 41.79.62.0/24 9619 0.5% AS37343 -- AirtelSeychelles AS45609 -- BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service 7 - 67.47.194.0/23 7104 0.4% AS16535 -- ECHOS-3 - Echostar Holding Purchasing Corporation 8 - 59.177.48.0/20 6538 0.4% AS17813 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 9 - 202.56.215.0/24 6207 0.3% AS24560 -- AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services 10 - 123.252.208.0/24 5753 0.3% AS17762 -- HTIL-TTML-IN-AP Tata Teleservices Maharashtra Ltd 11 - 139.139.19.0/24 5752 0.3% AS1562 -- DNIC-ASBLK-01550-01601 - DoD Network Information Center 12 - 194.63.9.0/24 5430 0.3% AS1273 -- CW Cable and Wireless Worldwide plc 13 - 69.38.178.0/24 4284 0.2% AS19406 -- TWRS-MA - Towerstream I, Inc. 14 - 59.177.64.0/18 3323 0.2% AS17813 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 15 - 59.177.144.0/20 2954 0.2% AS17813 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 16 - 78.111.6.0/23 2738 0.1% AS44410 -- ENTEKHAB-AS ENTEKHAB INDUSTRIAL GROUP 17 - 202.52.32.0/24 2715 0.1% AS55534 -- PPL-PK 4th Floor, PIDC House 18 - 65.82.30.0/24 2565 0.1% AS6197 -- BATI-ATL - BellSouth Network Solutions, Inc 19 - 115.170.128.0/17 2499 0.1% AS4847 -- CNIX-AP China Networks Inter-Exchange 20 - 64.58.53.0/24 2276 0.1% AS36329 -- INTRADO - Intrado, Inc. Details at http://bgpupdates.potaroo.net ------------------------------------ Copies of this report are mailed to: nanog(a)nanog.org eof-list(a)ripe.net apops(a)apops.net routing-wg(a)ripe.net afnog(a)afnog.org

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The Cidr Report
by cidr-report＠potaroo.net 04 Aug '12

04 Aug '12

This report has been generated at Fri Aug 3 21:13:03 2012 AEST. The report analyses the BGP Routing Table of AS2.0 router and generates a report on aggregation potential within the table. Check http://www.cidr-report.org for a current version of this report. Recent Table History Date Prefixes CIDR Agg 27-07-12 421258 243452 28-07-12 421509 243642 29-07-12 421732 243605 30-07-12 421263 243951 31-07-12 421699 244653 01-08-12 423193 244312 02-08-12 423313 244418 03-08-12 423749 244407 AS Summary 41805 Number of ASes in routing system 17447 Number of ASes announcing only one prefix 3444 Largest number of prefixes announced by an AS AS7029 : WINDSTREAM - Windstream Communications Inc 114212832 Largest address span announced by an AS (/32s) AS4134 : CHINANET-BACKBONE No.31,Jin-rong Street Aggregation Summary The algorithm used in this report proposes aggregation only when there is a precise match using the AS path, so as to preserve traffic transit policies. Aggregation is also proposed across non-advertised address space ('holes'). --- 03Aug12 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 423734 244478 179256 42.3% All ASes AS6389 3343 194 3149 94.2% BELLSOUTH-NET-BLK - BellSouth.net Inc. AS28573 2026 63 1963 96.9% NET Servicos de Comunicao S.A. AS17974 2291 437 1854 80.9% TELKOMNET-AS2-AP PT Telekomunikasi Indonesia AS7029 3444 1772 1672 48.5% WINDSTREAM - Windstream Communications Inc AS18566 2088 417 1671 80.0% COVAD - Covad Communications Co. AS4766 2765 1296 1469 53.1% KIXS-AS-KR Korea Telecom AS10620 2036 608 1428 70.1% Telmex Colombia S.A. AS4323 1580 389 1191 75.4% TWTC - tw telecom holdings, inc. AS1785 1947 818 1129 58.0% AS-PAETEC-NET - PaeTec Communications, Inc. AS22773 1699 576 1123 66.1% ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc. AS4755 1604 541 1063 66.3% TATACOMM-AS TATA Communications formerly VSNL is Leading ISP AS7303 1459 445 1014 69.5% Telecom Argentina S.A. AS7552 1128 227 901 79.9% VIETEL-AS-AP Vietel Corporation AS6458 881 48 833 94.6% Telgua AS8151 1475 669 806 54.6% Uninet S.A. de C.V. AS18101 941 158 783 83.2% RELIANCE-COMMUNICATIONS-IN Reliance Communications Ltd.DAKC MUMBAI AS4808 1122 355 767 68.4% CHINA169-BJ CNCGROUP IP network China169 Beijing Province Network AS9394 910 167 743 81.6% CRNET CHINA RAILWAY Internet(CRNET) AS13977 839 123 716 85.3% CTELCO - FAIRPOINT COMMUNICATIONS, INC. AS15557 1215 552 663 54.6% LDCOMNET Societe Francaise du Radiotelephone S.A AS2118 664 14 650 97.9% RELCOM-AS OOO "NPO Relcom" AS855 684 52 632 92.4% CANET-ASN-4 - Bell Aliant Regional Communications, Inc. AS3356 1106 474 632 57.1% LEVEL3 Level 3 Communications AS17676 699 75 624 89.3% GIGAINFRA Softbank BB Corp. AS22561 1025 414 611 59.6% DIGITAL-TELEPORT - Digital Teleport Inc. AS19262 1001 403 598 59.7% VZGNI-TRANSIT - Verizon Online LLC AS24560 1038 449 589 56.7% AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services AS4780 812 242 570 70.2% SEEDNET Digital United Inc. AS30036 1432 868 564 39.4% MEDIACOM-ENTERPRISE-BUSINESS - Mediacom Communications Corp AS3549 998 437 561 56.2% GBLX Global Crossing Ltd. Total 44252 13283 30969 70.0% Top 30 total Possible Bogus Routes 5.178.24.0/21 AS21191 ASN-SEVERTTK Closed Joint Stock Company "SeverTransTeleCom" 10.86.64.32/30 AS65530 -Private Use AS- 10.86.64.36/30 AS65530 -Private Use AS- 10.86.65.32/30 AS65530 -Private Use AS- 10.86.65.36/30 AS65530 -Private Use AS- 10.255.255.0/30 AS65530 -Private Use AS- 10.255.255.4/30 AS65530 -Private Use AS- 10.255.255.8/30 AS65530 -Private Use AS- 14.192.0.0/22 AS45464 NEXTWEB-AS-AP Room 201, TGU Bldg 14.192.4.0/22 AS45464 NEXTWEB-AS-AP Room 201, TGU Bldg 14.192.8.0/22 AS45464 NEXTWEB-AS-AP Room 201, TGU Bldg 14.192.12.0/22 AS45464 NEXTWEB-AS-AP Room 201, TGU Bldg 14.192.16.0/22 AS45464 NEXTWEB-AS-AP Room 201, TGU Bldg 14.192.20.0/22 AS45464 NEXTWEB-AS-AP Room 201, TGU Bldg 14.192.24.0/22 AS45464 NEXTWEB-AS-AP Room 201, TGU Bldg 14.192.28.0/22 AS45464 NEXTWEB-AS-AP Room 201, TGU Bldg 27.112.114.0/24 AS23884 PROENNET-AS Proimage Engineering and Communication Co.,Ltd. 41.207.224.0/23 AS36898 UNINET AfricaINX created auth-num for AS36898 41.207.238.0/23 AS36898 UNINET AfricaINX created auth-num for AS36898 41.222.80.0/21 AS37110 moztel-as 41.223.108.0/22 AS36966 EDL_AS Edgenet AS 62.61.220.0/24 AS24974 TACHYON-EU Tachyon Europe BV 62.61.221.0/24 AS24974 TACHYON-EU Tachyon Europe BV 64.66.32.0/20 AS18864 66.171.32.0/20 AS705 UUNET - MCI Communications Services, Inc. d/b/a Verizon Business 66.180.239.0/24 AS35888 VIGNETTE - VIGNETTE CORPORATION 66.207.32.0/20 AS23011 66.245.176.0/20 AS19318 NJIIX-AS-1 - NEW JERSEY INTERNATIONAL INTERNET EXCHANGE LLC 66.251.128.0/24 AS33227 BLUEBRIDGE-NETWORKS - Blue Bridge Networks 66.251.133.0/24 AS33227 BLUEBRIDGE-NETWORKS - Blue Bridge Networks 66.251.134.0/24 AS33227 BLUEBRIDGE-NETWORKS - Blue Bridge Networks 66.251.136.0/21 AS33227 BLUEBRIDGE-NETWORKS - Blue Bridge Networks 66.251.140.0/24 AS33227 BLUEBRIDGE-NETWORKS - Blue Bridge Networks 66.251.141.0/24 AS33227 BLUEBRIDGE-NETWORKS - Blue Bridge Networks 66.251.142.0/24 AS33227 BLUEBRIDGE-NETWORKS - Blue Bridge Networks 66.251.143.0/24 AS3356 LEVEL3 Level 3 Communications 69.46.224.0/20 AS32592 HUNT-BROTHERS-OF-LOUISIANA-LLC - Hunt Brothers 69.46.233.0/24 AS32592 HUNT-BROTHERS-OF-LOUISIANA-LLC - Hunt Brothers 69.46.236.0/24 AS32592 HUNT-BROTHERS-OF-LOUISIANA-LLC - Hunt Brothers 70.34.112.0/20 AS27589 MOJOHOST - MOJOHOST 71.19.134.0/23 AS3313 INET-AS BT Italia S.p.A. 72.35.224.0/22 AS30097 NUWAVE - NuWave 72.35.229.0/24 AS30188 TELEVERGENCE - Televergence Solutions Inc. 72.35.232.0/21 AS30097 NUWAVE - NuWave 72.44.16.0/20 AS15054 HAMELTRONICS - Hameltronics, LLC 74.91.48.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.49.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.50.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.51.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.52.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.53.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.54.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.55.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.56.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.57.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.58.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.59.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.60.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.61.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.62.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.63.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.112.96.0/22 AS2828 XO-AS15 - XO Communications 74.115.124.0/23 AS46540 74.115.126.0/24 AS11260 EASTLINK-HSI - EastLink 81.22.64.0/20 AS5511 OPENTRANSIT France Telecom S.A. 82.101.160.0/19 AS5511 OPENTRANSIT France Telecom S.A. 110.34.44.0/22 AS12653 COMTONET KB Impuls Hellas S.A. 116.206.72.0/24 AS6461 MFNX MFN - Metromedia Fiber Network 116.206.85.0/24 AS6461 MFNX MFN - Metromedia Fiber Network 116.206.103.0/24 AS6461 MFNX MFN - Metromedia Fiber Network 117.120.56.0/21 AS4755 TATACOMM-AS TATA Communications formerly VSNL is Leading ISP 121.46.0.0/16 AS4134 CHINANET-BACKBONE No.31,Jin-rong Street 142.54.0.0/19 AS23498 CDSI - Cogeco Data Services LP 172.14.0.0/24 AS57871 ASTELECENTR TeleCentr Ltd. 172.15.0.0/24 AS57871 ASTELECENTR TeleCentr Ltd. 172.45.1.0/24 AS3356 LEVEL3 Level 3 Communications 172.102.0.0/22 AS4812 CHINANET-SH-AP China Telecom (Group) 172.116.0.0/24 AS7018 ATT-INTERNET4 - AT&T Services, Inc. 172.120.16.0/21 AS19891 BML-AS Bill Me Later, Inc 192.0.0.0/24 AS14745 INTERNAP-BLOCK-4 - Internap Network Services Corporation 198.18.0.0/15 AS14744 INTERNAP-BLOCK-4 - Internap Network Services Corporation 198.51.100.0/24 AS14744 INTERNAP-BLOCK-4 - Internap Network Services Corporation 200.1.112.0/24 AS29754 GO2TEL GO2TEL.COM INC. 200.6.49.0/24 AS23148 TERREMARK Terremark 200.24.73.0/24 AS26061 Equant Colombia 200.53.0.0/19 AS13878 Diveo do Brasil Telecomunicacoes Ltda 200.58.248.0/21 AS27849 200.75.184.0/21 AS14754 Telgua 202.1.224.0/24 AS10097 FLOWCOM Flow Communications 2/541 Kent St Sydney NSW 2000 202.8.106.0/24 AS9530 SHINSEGAE-AS SHINSEGAE I&C Co., Ltd. 202.58.113.0/24 AS19161 202.83.120.0/21 AS37972 202.83.124.0/24 AS37972 202.83.125.0/24 AS37972 202.83.126.0/24 AS37972 202.94.1.0/24 AS4808 CHINA169-BJ CNCGROUP IP network China169 Beijing Province Network 202.140.128.0/19 AS9583 SIFY-AS-IN Sify Limited 202.174.125.0/24 AS9498 BBIL-AP BHARTI Airtel Ltd. 202.176.1.0/24 AS9942 COMINDICO-AP SOUL Converged Communications Australia 202.179.134.0/24 AS23966 LDN-AS-PK LINKdotNET Telecom Limited 202.180.224.0/19 AS1221 ASN-TELSTRA Telstra Pty Ltd 202.180.236.0/24 AS38472 UCMS-AS-AP UCMS 202.180.253.0/24 AS38472 UCMS-AS-AP UCMS 202.180.255.0/24 AS38472 UCMS-AS-AP UCMS 203.0.113.0/24 AS14744 INTERNAP-BLOCK-4 - Internap Network Services Corporation 203.23.1.0/24 AS18111 NETSPEED-AS-AP Netspeed Internet Communications 203.24.38.0/24 AS18111 NETSPEED-AS-AP Netspeed Internet Communications 203.30.127.0/24 AS18111 NETSPEED-AS-AP Netspeed Internet Communications 203.32.86.0/23 AS18111 NETSPEED-AS-AP Netspeed Internet Communications 203.32.86.0/24 AS18111 NETSPEED-AS-AP Netspeed Internet Communications 203.32.87.0/24 AS18111 NETSPEED-AS-AP Netspeed Internet Communications 203.32.188.0/24 AS1221 ASN-TELSTRA Telstra Pty Ltd 203.142.219.0/24 AS45149 204.9.116.0/22 AS30097 NUWAVE - NuWave 204.10.88.0/21 AS3356 LEVEL3 Level 3 Communications 204.10.92.0/23 AS30097 NUWAVE - NuWave 204.10.94.0/23 AS30097 NUWAVE - NuWave 204.14.0.0/21 AS30693 EONIX-CORPORATION-AS-PHX01-WWW-INFINITIE-NET - Eonix Corporation 204.14.0.0/24 AS30693 EONIX-CORPORATION-AS-PHX01-WWW-INFINITIE-NET - Eonix Corporation 204.14.2.0/24 AS30693 EONIX-CORPORATION-AS-PHX01-WWW-INFINITIE-NET - Eonix Corporation 204.14.3.0/24 AS30693 EONIX-CORPORATION-AS-PHX01-WWW-INFINITIE-NET - Eonix Corporation 205.175.214.0/24 AS5583 ORANGE-BUSINESS-SERVICES-BENELUX France Telecom S.A. 206.197.184.0/24 AS23304 DATOTEL-STL-AS - Datotel LLC, a NetLabs LLC Company 207.174.131.0/24 AS26116 INDRA - Indra's Net Inc 207.174.132.0/23 AS26116 INDRA - Indra's Net Inc 207.174.152.0/23 AS26116 INDRA - Indra's Net Inc 207.174.154.0/24 AS26116 INDRA - Indra's Net Inc 207.174.155.0/24 AS26116 INDRA - Indra's Net Inc 207.174.200.0/24 AS22658 EARTHNET - Earthnet, Inc. 207.174.248.0/21 AS6653 PRIVATEI - privateI, LLC 207.231.96.0/19 AS11194 NUNETPA - NuNet Inc. 208.83.53.0/24 AS40569 YGOMI-AS - Ygomi LLC 208.93.144.0/21 AS30693 EONIX-CORPORATION-AS-PHX01-WWW-INFINITIE-NET - Eonix Corporation 208.93.151.0/24 AS30693 EONIX-CORPORATION-AS-PHX01-WWW-INFINITIE-NET - Eonix Corporation 209.148.64.0/19 AS13773 TELNETCOMM - Telnet Communications 209.177.64.0/20 AS6461 MFNX MFN - Metromedia Fiber Network 209.213.0.0/20 AS33005 ELTOPIA - Eltopia.com, LLC 213.150.202.0/24 AS8513 SKYVISION SkyVision Global Networks Ltd 213.150.204.0/24 AS29338 AFOL-AS Used by Africaonline Operations 216.12.160.0/20 AS26627 AS-PILOSOFT - Pilosoft, Inc. 216.21.160.0/20 AS27876 American Data Networks 216.146.0.0/19 AS11915 TELWEST-NETWORK-SVCS-STATIC - TEL WEST COMMUNICATIONS LLC 216.194.160.0/20 AS27876 American Data Networks Please see http://www.cidr-report.org for the full report ------------------------------------ Copies of this report are mailed to: nanog(a)nanog.org eof-list(a)ripe.net apops(a)apops.net routing-wg(a)ripe.net afnog(a)afnog.org

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Weekly Routing Table Report
by Routing Analysis Role Account 03 Aug '12

03 Aug '12

This is an automated weekly mailing describing the state of the Internet Routing Table as seen from APNIC's router in Japan. The posting is sent to APOPS, NANOG, AfNOG, AusNOG, SANOG, PacNOG, LacNOG, TRNOG, CaribNOG and the RIPE Routing Working Group. Daily listings are sent to bgp-stats(a)lists.apnic.net For historical data, please see http://thyme.rand.apnic.net. If you have any comments please contact Philip Smith <pfsinoz(a)gmail.com>. Routing Table Report 04:00 +10GMT Sat 04 Aug, 2012 Report Website: http://thyme.rand.apnic.net Detailed Analysis: http://thyme.rand.apnic.net/current/ Analysis Summary ---------------- BGP routing table entries examined: 421297 Prefixes after maximum aggregation: 176997 Deaggregation factor: 2.38 Unique aggregates announced to Internet: 205030 Total ASes present in the Internet Routing Table: 41696 Prefixes per ASN: 10.10 Origin-only ASes present in the Internet Routing Table: 33409 Origin ASes announcing only one prefix: 15690 Transit ASes present in the Internet Routing Table: 5591 Transit-only ASes present in the Internet Routing Table: 133 Average AS path length visible in the Internet Routing Table: 4.5 Max AS path length visible: 32 Max AS path prepend of ASN ( 48687) 24 Prefixes from unregistered ASNs in the Routing Table: 392 Unregistered ASNs in the Routing Table: 151 Number of 32-bit ASNs allocated by the RIRs: 3071 Number of 32-bit ASNs visible in the Routing Table: 2696 Prefixes from 32-bit ASNs in the Routing Table: 6948 Special use prefixes present in the Routing Table: 0 Prefixes being announced from unallocated address space: 161 Number of addresses announced to Internet: 2572875148 Equivalent to 153 /8s, 90 /16s and 245 /24s Percentage of available address space announced: 69.4 Percentage of allocated address space announced: 69.5 Percentage of available address space allocated: 99.9 Percentage of address space in use by end-sites: 93.1 Total number of prefixes smaller than registry allocations: 147802 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 102288 Total APNIC prefixes after maximum aggregation: 32823 APNIC Deaggregation factor: 3.12 Prefixes being announced from the APNIC address blocks: 102793 Unique aggregates announced from the APNIC address blocks: 42228 APNIC Region origin ASes present in the Internet Routing Table: 4730 APNIC Prefixes per ASN: 21.73 APNIC Region origin ASes announcing only one prefix: 1240 APNIC Region transit ASes present in the Internet Routing Table: 754 Average APNIC Region AS path length visible: 4.6 Max APNIC Region AS path length visible: 26 Number of APNIC region 32-bit ASNs visible in the Routing Table: 271 Number of APNIC addresses announced to Internet: 706547840 Equivalent to 42 /8s, 29 /16s and 16 /24s Percentage of available APNIC address space announced: 82.6 APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431 (pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319, 58368-59391, 131072-133119 APNIC Address Blocks 1/8, 14/8, 27/8, 36/8, 39/8, 42/8, 43/8, 49/8, 58/8, 59/8, 60/8, 61/8, 101/8, 103/8, 106/8, 110/8, 111/8, 112/8, 113/8, 114/8, 115/8, 116/8, 117/8, 118/8, 119/8, 120/8, 121/8, 122/8, 123/8, 124/8, 125/8, 126/8, 133/8, 150/8, 153/8, 163/8, 171/8, 175/8, 180/8, 182/8, 183/8, 202/8, 203/8, 210/8, 211/8, 218/8, 219/8, 220/8, 221/8, 222/8, 223/8, ARIN Region Analysis Summary ---------------------------- Prefixes being announced by ARIN Region ASes: 153466 Total ARIN prefixes after maximum aggregation: 77832 ARIN Deaggregation factor: 1.97 Prefixes being announced from the ARIN address blocks: 154514 Unique aggregates announced from the ARIN address blocks: 68935 ARIN Region origin ASes present in the Internet Routing Table: 15204 ARIN Prefixes per ASN: 10.16 ARIN Region origin ASes announcing only one prefix: 5759 ARIN Region transit ASes present in the Internet Routing Table: 1602 Average ARIN Region AS path length visible: 4.1 Max ARIN Region AS path length visible: 24 Number of ARIN region 32-bit ASNs visible in the Routing Table: 16 Number of ARIN addresses announced to Internet: 1073191808 Equivalent to 63 /8s, 247 /16s and 155 /24s Percentage of available ARIN address space announced: 56.8 ARIN AS Blocks 1-1876, 1902-2042, 2044-2046, 2048-2106 (pre-ERX allocations) 2138-2584, 2615-2772, 2823-2829, 2880-3153 3354-4607, 4865-5119, 5632-6655, 6912-7466 7723-8191, 10240-12287, 13312-15359, 16384-17407 18432-20479, 21504-23551, 25600-26591, 26624-27647, 29696-30719, 31744-33791 35840-36863, 39936-40959, 46080-47103 53248-55295, 393216-394239 ARIN Address Blocks 3/8, 4/8, 6/8, 7/8, 8/8, 9/8, 11/8, 12/8, 13/8, 15/8, 16/8, 17/8, 18/8, 19/8, 20/8, 21/8, 22/8, 23/8, 24/8, 26/8, 28/8, 29/8, 30/8, 32/8, 33/8, 34/8, 35/8, 38/8, 40/8, 44/8, 45/8, 47/8, 48/8, 50/8, 52/8, 53/8, 54/8, 55/8, 56/8, 57/8, 63/8, 64/8, 65/8, 66/8, 67/8, 68/8, 69/8, 70/8, 71/8, 72/8, 73/8, 74/8, 75/8, 76/8, 96/8, 97/8, 98/8, 99/8, 100/8, 104/8, 107/8, 108/8, 128/8, 129/8, 130/8, 131/8, 132/8, 134/8, 135/8, 136/8, 137/8, 138/8, 139/8, 140/8, 142/8, 143/8, 144/8, 146/8, 147/8, 148/8, 149/8, 152/8, 155/8, 156/8, 157/8, 158/8, 159/8, 160/8, 161/8, 162/8, 164/8, 165/8, 166/8, 167/8, 168/8, 169/8, 170/8, 172/8, 173/8, 174/8, 184/8, 192/8, 198/8, 199/8, 204/8, 205/8, 206/8, 207/8, 208/8, 209/8, 214/8, 215/8, 216/8, RIPE Region Analysis Summary ---------------------------- Prefixes being announced by RIPE Region ASes: 105816 Total RIPE prefixes after maximum aggregation: 55707 RIPE Deaggregation factor: 1.90 Prefixes being announced from the RIPE address blocks: 107992 Unique aggregates announced from the RIPE address blocks: 68316 RIPE Region origin ASes present in the Internet Routing Table: 16728 RIPE Prefixes per ASN: 6.46 RIPE Region origin ASes announcing only one prefix: 8102 RIPE Region transit ASes present in the Internet Routing Table: 2709 Average RIPE Region AS path length visible: 5.0 Max RIPE Region AS path length visible: 32 Number of RIPE region 32-bit ASNs visible in the Routing Table: 1761 Number of RIPE addresses announced to Internet: 638230756 Equivalent to 38 /8s, 10 /16s and 160 /24s Percentage of available RIPE address space announced: 92.8 RIPE AS Blocks 1877-1901, 2043, 2047, 2107-2136, 2585-2614 (pre-ERX allocations) 2773-2822, 2830-2879, 3154-3353, 5377-5631 6656-6911, 8192-9215, 12288-13311, 15360-16383 20480-21503, 24576-25599, 28672-29695 30720-31743, 33792-35839, 38912-39935 40960-45055, 47104-52223, 56320-58367 59392-61439, 196608-199679 RIPE Address Blocks 2/8, 5/8, 25/8, 31/8, 37/8, 46/8, 51/8, 62/8, 77/8, 78/8, 79/8, 80/8, 81/8, 82/8, 83/8, 84/8, 85/8, 86/8, 87/8, 88/8, 89/8, 90/8, 91/8, 92/8, 93/8, 94/8, 95/8, 109/8, 141/8, 145/8, 151/8, 176/8, 178/8, 185/8, 188/8, 193/8, 194/8, 195/8, 212/8, 213/8, 217/8, LACNIC Region Analysis Summary ------------------------------ Prefixes being announced by LACNIC Region ASes: 43064 Total LACNIC prefixes after maximum aggregation: 8394 LACNIC Deaggregation factor: 5.13 Prefixes being announced from the LACNIC address blocks: 45825 Unique aggregates announced from the LACNIC address blocks: 21998 LACNIC Region origin ASes present in the Internet Routing Table: 1619 LACNIC Prefixes per ASN: 28.30 LACNIC Region origin ASes announcing only one prefix: 421 LACNIC Region transit ASes present in the Internet Routing Table: 314 Average LACNIC Region AS path length visible: 4.7 Max LACNIC Region AS path length visible: 25 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 642 Number of LACNIC addresses announced to Internet: 113014696 Equivalent to 6 /8s, 188 /16s and 119 /24s Percentage of available LACNIC address space announced: 67.4 LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247, 262144-263167 plus ERX transfers LACNIC Address Blocks 177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8, 191/8, 200/8, 201/8, AfriNIC Region Analysis Summary ------------------------------- Prefixes being announced by AfriNIC Region ASes: 9558 Total AfriNIC prefixes after maximum aggregation: 2187 AfriNIC Deaggregation factor: 4.37 Prefixes being announced from the AfriNIC address blocks: 10012 Unique aggregates announced from the AfriNIC address blocks: 3413 AfriNIC Region origin ASes present in the Internet Routing Table: 553 AfriNIC Prefixes per ASN: 18.10 AfriNIC Region origin ASes announcing only one prefix: 168 AfriNIC Region transit ASes present in the Internet Routing Table: 124 Average AfriNIC Region AS path length visible: 4.6 Max AfriNIC Region AS path length visible: 25 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 6 Number of AfriNIC addresses announced to Internet: 41555712 Equivalent to 2 /8s, 122 /16s and 23 /24s Percentage of available AfriNIC address space announced: 41.3 AfriNIC AS Blocks 36864-37887, 327680-328703 & ERX transfers AfriNIC Address Blocks 41/8, 102/8, 105/8, 154/8, 196/8, 197/8, APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 4766 2760 11123 1253 Korea Telecom (KIX) 17974 2291 702 54 PT TELEKOMUNIKASI INDONESIA 7545 1710 301 86 TPG Internet Pty Ltd 4755 1603 386 156 TATA Communications formerly 9829 1310 1084 31 BSNL National Internet Backbo 9583 1159 87 507 Sify Limited 7552 1128 1062 11 Vietel Corporation 4808 1122 2052 322 CNCGROUP IP network: China169 24560 1037 384 165 Bharti Airtel Ltd., Telemedia 9498 993 294 73 BHARTI Airtel Ltd. Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 7029 3443 986 155 Windstream Communications Inc 6389 3343 3773 191 bellsouth.net, inc. 18566 2088 382 181 Covad Communications 1785 1946 681 131 PaeTec Communications, Inc. 22773 1699 2914 125 Cox Communications, Inc. 20115 1646 1572 611 Charter Communications 4323 1577 1027 385 Time Warner Telecom 30036 1431 280 786 Mediacom Communications Corp 7018 1247 10039 816 AT&T WorldNet Services 11492 1191 216 351 Cable One Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 8402 1569 544 16 Corbina telecom 15557 1215 2247 55 LDCOM NETWORKS 12479 823 761 88 Uni2 Autonomous System 34984 735 189 177 BILISIM TELEKOM 20940 722 236 566 Akamai Technologies European 6830 714 2310 445 UPC Distribution Services 31148 704 37 9 FreeNet ISP 2118 664 97 14 EUnet/RELCOM Autonomous Syste 13188 660 100 9 Educational Network 8551 577 364 61 Bezeq International Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 10620 2036 350 211 TVCABLE BOGOTA 28573 2026 1228 58 NET Servicos de Comunicao S.A 6503 1527 419 66 AVANTEL, S.A. 8151 1473 3071 346 UniNet S.A. de C.V. 7303 1460 936 198 Telecom Argentina Stet-France 6458 882 81 15 GUATEL 27947 719 74 95 Telconet S.A 11172 644 91 74 Servicios Alestra S.A de C.V 3816 602 255 90 Empresa Nacional de Telecomun 22047 583 326 15 VTR PUNTO NET S.A. Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 8452 966 958 13 TEDATA 24863 864 274 32 LINKdotNET AS number 6713 509 650 19 Itissalat Al-MAGHRIB 36998 483 48 3 MOBITEL 24835 286 80 8 RAYA Telecom - Egypt 3741 262 905 223 The Internet Solution 33776 228 12 19 Starcomms Nigeria Limited 12258 197 28 62 Vodacom Internet Company 29975 191 667 21 Vodacom 15706 177 32 6 Sudatel Internet Exchange Aut Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 7029 3443 986 155 Windstream Communications Inc 6389 3343 3773 191 bellsouth.net, inc. 4766 2760 11123 1253 Korea Telecom (KIX) 17974 2291 702 54 PT TELEKOMUNIKASI INDONESIA 18566 2088 382 181 Covad Communications 10620 2036 350 211 TVCABLE BOGOTA 28573 2026 1228 58 NET Servicos de Comunicao S.A 1785 1946 681 131 PaeTec Communications, Inc. 7545 1710 301 86 TPG Internet Pty Ltd 22773 1699 2914 125 Cox Communications, Inc. Complete listing at http://thyme.rand.apnic.net/current/data-ASnet Global Per AS Maximum Aggr summary ---------------------------------- ASN No of nets Net Savings Description 6389 3343 3152 bellsouth.net, inc. 17974 2291 2237 PT TELEKOMUNIKASI INDONESIA 28573 2026 1968 NET Servicos de Comunicao S.A 18566 2088 1907 Covad Communications 10620 2036 1825 TVCABLE BOGOTA 1785 1946 1815 PaeTec Communications, Inc. 7545 1710 1624 TPG Internet Pty Ltd 22773 1699 1574 Cox Communications, Inc. 8402 1569 1553 Corbina telecom 4766 2760 1507 Korea Telecom (KIX) Complete listing at http://thyme.rand.apnic.net/current/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Network Transit AS Description 59414 UNALLOCATED 5.102.144.0/21 15576 Nextra backbone in D 59407 UNALLOCATED 5.134.16.0/21 51167 Giga-Hosting GmbH 59457 UNALLOCATED 5.149.64.0/24 35567 DASTO semtel d.o.o. 59457 UNALLOCATED 5.149.65.0/24 35567 DASTO semtel d.o.o. 59457 UNALLOCATED 5.149.67.0/24 35567 DASTO semtel d.o.o. 59457 UNALLOCATED 5.149.68.0/24 35567 DASTO semtel d.o.o. 59457 UNALLOCATED 5.149.71.0/24 35567 DASTO semtel d.o.o. 59458 UNALLOCATED 5.149.96.0/21 50597 ScopeSky Communicati 59458 UNALLOCATED 5.149.104.0/22 50597 ScopeSky Communicati 59473 UNALLOCATED 5.149.152.0/22 44843 AmsterdamTelecom Ltd Complete listing at http://thyme.rand.apnic.net/current/data-badAS Advertised Unallocated Addresses -------------------------------- Network Origin AS Description 5.175.80.0/21 47886 Equinix Netherlands IP Platfo 5.175.128.0/17 12586 GHOSTnet 5.178.24.0/21 21191 SeverTransTeleCom Autonomous 14.192.0.0/22 45464 Room 201, TGU Bldg 14.192.4.0/22 45464 Room 201, TGU Bldg 14.192.8.0/22 45464 Room 201, TGU Bldg 14.192.12.0/22 45464 Room 201, TGU Bldg 14.192.16.0/22 45464 Room 201, TGU Bldg 14.192.20.0/22 45464 Room 201, TGU Bldg 14.192.24.0/22 45464 Room 201, TGU Bldg Complete listing at http://thyme.rand.apnic.net/current/data-add-IANA Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:19 /9:12 /10:28 /11:82 /12:236 /13:474 /14:848 /15:1529 /16:12336 /17:6372 /18:10753 /19:20953 /20:29981 /21:31860 /22:41601 /23:39706 /24:220602 /25:1282 /26:1504 /27:852 /28:164 /29:61 /30:18 /31:0 /32:24 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 7029 2802 3443 Windstream Communications Inc 18566 2038 2088 Covad Communications 6389 1835 3343 bellsouth.net, inc. 30036 1366 1431 Mediacom Communications Corp 8402 1266 1569 Corbina telecom 15557 1159 1215 LDCOM NETWORKS 11492 1154 1191 Cable One 22773 1123 1699 Cox Communications, Inc. 1785 1053 1946 PaeTec Communications, Inc. 6503 1050 1527 AVANTEL, S.A. Complete listing at http://thyme.rand.apnic.net/current/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:558 2:704 3:1 4:13 5:299 6:3 8:439 12:2003 13:1 14:632 15:11 16:3 17:6 20:24 23:204 24:1800 27:1327 31:1024 32:56 33:2 34:2 36:8 37:664 38:821 39:1 40:134 41:2838 42:158 44:3 46:1554 47:2 49:427 50:576 52:13 54:14 55:8 56:1 57:31 58:986 59:510 60:236 61:1284 62:974 63:2028 64:4246 65:2250 66:4532 67:2037 68:1152 69:3204 70:986 71:520 72:1867 74:2608 75:489 76:332 77:951 78:946 79:497 80:1275 81:945 82:640 83:541 84:619 85:1147 86:797 87:932 88:353 89:1794 90:305 91:5067 92:588 93:1452 94:1557 95:1278 96:400 97:318 98:903 99:39 100:22 101:257 103:1341 105:464 106:112 107:189 108:413 109:1911 110:795 111:947 112:434 113:676 114:687 115:858 116:930 117:735 118:944 119:1236 120:360 121:696 122:1677 123:1162 124:1378 125:1265 128:555 129:183 130:267 131:640 132:297 133:22 134:245 135:61 136:216 137:240 138:342 139:183 140:496 141:258 142:451 143:374 144:496 145:78 146:510 147:290 148:770 149:319 150:150 151:186 152:473 153:175 154:19 155:405 156:222 157:381 158:191 159:630 160:348 161:386 162:385 163:190 164:675 165:411 166:577 167:533 168:963 169:126 170:899 171:147 172:5 173:1739 174:628 175:432 176:570 177:1003 178:1657 180:1327 181:115 182:1030 183:233 184:572 186:2069 187:1115 188:1338 189:1588 190:6176 192:6026 193:5444 194:4198 195:3264 196:1231 197:201 198:3695 199:4945 200:6015 201:1981 202:8728 203:8694 204:4393 205:2534 206:2796 207:2861 208:4042 209:3631 210:2761 211:1548 212:2010 213:1808 214:878 215:86 216:5083 217:1555 218:561 219:315 220:1239 221:570 222:336 223:372 End of report

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IETF sidr meeting after RIPE65
by Rob Evans 03 Aug '12

03 Aug '12

Hi, If you haven't yet booked your return travel from Amsterdam for RIPE 65, and are interested in participating in such things, it may be worth noting that there will be an "interim" meeting of the IETF's sidr (Secure Inter-Domain Routing) working group at the same venue on September 29th, i.e. the day after the RIPE meeting finishes. This will be part of a Large Interim Meeting where several other working groups will also be present (although don't ask me which ones). Best regards, Rob

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BGP Update Report
by cidr-report＠potaroo.net 28 Jul '12

28 Jul '12

BGP Update Report Interval: 21-Jul-12 -to- 26-Jul-12 (5 days) Observation Point: BGP Peering with AS131072 TOP 20 Unstable Origin AS Rank ASN Upds % Upds/Pfx AS-Name 1 - AS1637 39517 1.6% 365.9 -- DNIC-AS-01637 - Headquarters, USAISC 2 - AS17813 36407 1.4% 267.7 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 3 - AS8402 36092 1.4% 20.4 -- CORBINA-AS OJSC "Vimpelcom" 4 - AS47931 25100 1.0% 204.1 -- ALENETWORK A.L.E. COM NETWORK S.R.L 5 - AS9829 24636 1.0% 18.9 -- BSNL-NIB National Internet Backbone 6 - AS24560 23244 0.9% 22.4 -- AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services 7 - AS7029 18201 0.7% 5.1 -- WINDSTREAM - Windstream Communications Inc 8 - AS7552 15306 0.6% 13.5 -- VIETEL-AS-AP Vietel Corporation 9 - AS13118 14259 0.6% 297.1 -- ASN-YARTELECOM OJSC Rostelecom 10 - AS28573 13041 0.5% 6.3 -- NET Servicos de Comunicao S.A. 11 - AS6458 12662 0.5% 14.3 -- Telgua 12 - AS27738 11509 0.5% 20.7 -- Ecuadortelecom S.A. 13 - AS48277 11273 0.5% 201.3 -- SOREX SOREX MEDIA S.R.L. 14 - AS49074 10768 0.4% 219.8 -- TECHNOLOGICAL SC TECHNOLOGICAL SRL 15 - AS13979 10640 0.4% 3.4 -- ATT-IPFR - AT&T Services, Inc. 16 - AS6389 10419 0.4% 3.1 -- BELLSOUTH-NET-BLK - BellSouth.net Inc. 17 - AS5800 10203 0.4% 39.5 -- DNIC-ASBLK-05800-06055 - DoD Network Information Center 18 - AS18566 9878 0.4% 4.7 -- COVAD - Covad Communications Co. 19 - AS10620 9731 0.4% 4.8 -- Telmex Colombia S.A. 20 - AS8151 9158 0.4% 6.1 -- Uninet S.A. de C.V. TOP 20 Unstable Origin AS (Updates per announced prefix) Rank ASN Upds % Upds/Pfx AS-Name 1 - AS16535 4402 0.2% 1467.3 -- ECHOS-3 - Echostar Holding Purchasing Corporation 2 - AS44410 3241 0.1% 1080.3 -- ENTEKHAB-AS ENTEKHAB INDUSTRIAL GROUP 3 - AS49072 921 0.0% 921.0 -- APSUARA-AS TCA Apsuara Ltd. 4 - AS43348 1752 0.1% 876.0 -- TATARINOVA-AS PE Tatarinova Alla Ivanovna 5 - AS54037 841 0.0% 841.0 -- CAREER-GROUP-INC - CAREER GROUP INC 6 - AS26184 703 0.0% 703.0 -- ASA-HQAS - American Society of Anesthesiologists 7 - AS14452 6312 0.2% 701.3 -- IOS-ASN - INTERNET OF THE SANDHILLS 8 - AS58655 1204 0.1% 602.0 -- SKYTEL6-BD SkyTel Communications Limited 9 - AS51250 583 0.0% 583.0 -- ITE-PROTON-AS "Information technologies enterprise "Proton" LTD 10 - AS38857 1082 0.0% 541.0 -- ESOFT-TRANSIT-AS-AP e.Soft Technologies Ltd. 11 - AS56588 442 0.0% 442.0 -- EE-IC Estonian Informatics Centre 12 - AS3 440 0.0% 759.0 -- YUPITER-AS Yu-Piter ltd. 13 - AS42806 428 0.0% 428.0 -- TELECOM-AS Telecom Georgia 14 - AS1637 39517 1.6% 365.9 -- DNIC-AS-01637 - Headquarters, USAISC 15 - AS29398 327 0.0% 327.0 -- PETROBALTIC "Petrobaltic" S.A. 16 - AS13118 14259 0.6% 297.1 -- ASN-YARTELECOM OJSC Rostelecom 17 - AS23007 888 0.0% 296.0 -- Universidad de Los Andes 18 - AS4 296 0.0% 51.0 -- COMUNICALO DE MEXICO S.A. DE C.V 19 - AS27890 576 0.0% 288.0 -- Universidad de Oriente 20 - AS57201 281 0.0% 281.0 -- EDF-AS Estonian Defence Forces TOP 20 Unstable Prefixes Rank Prefix Upds % Origin AS -- AS Name 1 - 109.161.64.0/19 13690 0.5% AS13118 -- ASN-YARTELECOM OJSC Rostelecom 2 - 59.176.0.0/14 7722 0.3% AS17813 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 3 - 182.64.0.0/16 7432 0.3% AS24560 -- AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services 4 - 122.161.0.0/16 7428 0.3% AS24560 -- AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services 5 - 200.46.0.0/19 7057 0.3% AS21599 -- NETDIRECT S.A. 6 - 59.177.0.0/16 5820 0.2% AS17813 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 7 - 67.47.194.0/23 4396 0.2% AS16535 -- ECHOS-3 - Echostar Holding Purchasing Corporation 8 - 202.56.215.0/24 4324 0.2% AS24560 -- AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services 9 - 59.177.0.0/18 4155 0.2% AS17813 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 10 - 123.252.208.0/24 3922 0.1% AS17762 -- HTIL-TTML-IN-AP Tata Teleservices Maharashtra Ltd 11 - 59.177.48.0/20 3872 0.1% AS17813 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 12 - 139.139.19.0/24 3828 0.1% AS1562 -- DNIC-ASBLK-01550-01601 - DoD Network Information Center 13 - 194.63.9.0/24 3636 0.1% AS1273 -- CW Cable and Wireless Worldwide plc 14 - 65.82.30.0/24 3007 0.1% AS6197 -- BATI-ATL - BellSouth Network Solutions, Inc 15 - 69.38.178.0/24 2960 0.1% AS19406 -- TWRS-MA - Towerstream I, Inc. 16 - 59.177.0.0/19 2234 0.1% AS17813 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 17 - 115.170.128.0/17 2192 0.1% AS4847 -- CNIX-AP China Networks Inter-Exchange 18 - 59.177.64.0/18 2106 0.1% AS17813 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 19 - 202.159.215.0/24 2006 0.1% AS17813 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 20 - 59.177.144.0/20 2006 0.1% AS17813 -- MTNL-AP Mahanagar Telephone Nigam Ltd. Details at http://bgpupdates.potaroo.net ------------------------------------ Copies of this report are mailed to: nanog(a)nanog.org eof-list(a)ripe.net apops(a)apops.net routing-wg(a)ripe.net afnog(a)afnog.org

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The Cidr Report
by cidr-report＠potaroo.net 28 Jul '12

28 Jul '12

This report has been generated at Fri Jul 27 21:13:00 2012 AEST. The report analyses the BGP Routing Table of AS2.0 router and generates a report on aggregation potential within the table. Check http://www.cidr-report.org for a current version of this report. Recent Table History Date Prefixes CIDR Agg 20-07-12 419152 241935 21-07-12 420802 243450 22-07-12 420851 242316 23-07-12 420929 242400 24-07-12 420469 242764 25-07-12 420742 242807 26-07-12 420845 243201 27-07-12 421258 243595 AS Summary 41762 Number of ASes in routing system 17448 Number of ASes announcing only one prefix 3413 Largest number of prefixes announced by an AS AS7029 : WINDSTREAM - Windstream Communications Inc 114212832 Largest address span announced by an AS (/32s) AS4134 : CHINANET-BACKBONE No.31,Jin-rong Street Aggregation Summary The algorithm used in this report proposes aggregation only when there is a precise match using the AS path, so as to preserve traffic transit policies. Aggregation is also proposed across non-advertised address space ('holes'). --- 27Jul12 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 421768 243593 178175 42.2% All ASes AS6389 3382 194 3188 94.3% BELLSOUTH-NET-BLK - BellSouth.net Inc. AS17974 2274 459 1815 79.8% TELKOMNET-AS2-AP PT Telekomunikasi Indonesia AS7029 3413 1737 1676 49.1% WINDSTREAM - Windstream Communications Inc AS18566 2088 417 1671 80.0% COVAD - Covad Communications Co. AS28573 2044 472 1572 76.9% NET Servicos de Comunicao S.A. AS4766 2764 1295 1469 53.1% KIXS-AS-KR Korea Telecom AS10620 2030 606 1424 70.1% Telmex Colombia S.A. AS4323 1577 387 1190 75.5% TWTC - tw telecom holdings, inc. AS22773 1698 570 1128 66.4% ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc. AS1785 1940 816 1124 57.9% AS-PAETEC-NET - PaeTec Communications, Inc. AS4755 1613 576 1037 64.3% TATACOMM-AS TATA Communications formerly VSNL is Leading ISP AS7303 1458 451 1007 69.1% Telecom Argentina S.A. AS7552 1128 226 902 80.0% VIETEL-AS-AP Vietel Corporation AS6458 881 45 836 94.9% Telgua AS8151 1473 668 805 54.7% Uninet S.A. de C.V. AS18101 942 157 785 83.3% RELIANCE-COMMUNICATIONS-IN Reliance Communications Ltd.DAKC MUMBAI AS17908 828 60 768 92.8% TCISL Tata Communications AS4808 1117 350 767 68.7% CHINA169-BJ CNCGROUP IP network China169 Beijing Province Network AS9394 908 166 742 81.7% CRNET CHINA RAILWAY Internet(CRNET) AS13977 839 123 716 85.3% CTELCO - FAIRPOINT COMMUNICATIONS, INC. AS855 694 52 642 92.5% CANET-ASN-4 - Bell Aliant Regional Communications, Inc. AS3356 1105 473 632 57.2% LEVEL3 Level 3 Communications AS17676 695 75 620 89.2% GIGAINFRA Softbank BB Corp. AS2118 632 14 618 97.8% RELCOM-AS OOO "NPO Relcom" AS22561 1035 424 611 59.0% DIGITAL-TELEPORT - Digital Teleport Inc. AS19262 1001 403 598 59.7% VZGNI-TRANSIT - Verizon Online LLC AS4780 834 243 591 70.9% SEEDNET Digital United Inc. AS24560 1038 449 589 56.7% AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services AS3549 1000 437 563 56.3% GBLX Global Crossing Ltd. AS4804 653 96 557 85.3% MPX-AS Microplex PTY LTD Total 43084 12441 30643 71.1% Top 30 total Possible Bogus Routes 5.159.40.0/21 AS19682 NETWORKRECOVERY Business Recovery Services Limited 10.86.64.32/30 AS65530 -Private Use AS- 10.86.64.36/30 AS65530 -Private Use AS- 10.86.65.32/30 AS65530 -Private Use AS- 10.86.65.36/30 AS65530 -Private Use AS- 10.255.255.0/30 AS65530 -Private Use AS- 10.255.255.4/30 AS65530 -Private Use AS- 10.255.255.8/30 AS65530 -Private Use AS- 14.192.0.0/22 AS45464 NEXTWEB-AS-AP Room 201, TGU Bldg 14.192.4.0/22 AS45464 NEXTWEB-AS-AP Room 201, TGU Bldg 14.192.8.0/22 AS45464 NEXTWEB-AS-AP Room 201, TGU Bldg 14.192.12.0/22 AS45464 NEXTWEB-AS-AP Room 201, TGU Bldg 14.192.16.0/22 AS45464 NEXTWEB-AS-AP Room 201, TGU Bldg 14.192.20.0/22 AS45464 NEXTWEB-AS-AP Room 201, TGU Bldg 14.192.24.0/22 AS45464 NEXTWEB-AS-AP Room 201, TGU Bldg 14.192.28.0/22 AS45464 NEXTWEB-AS-AP Room 201, TGU Bldg 27.112.114.0/24 AS23884 PROENNET-AS Proimage Engineering and Communication Co.,Ltd. 41.222.80.0/21 AS37110 moztel-as 41.223.108.0/22 AS36966 EDL_AS Edgenet AS 62.61.220.0/24 AS24974 TACHYON-EU Tachyon Europe BV 62.61.221.0/24 AS24974 TACHYON-EU Tachyon Europe BV 64.66.32.0/20 AS18864 66.171.32.0/20 AS705 UUNET - MCI Communications Services, Inc. d/b/a Verizon Business 66.180.239.0/24 AS35888 VIGNETTE - VIGNETTE CORPORATION 66.207.32.0/20 AS23011 66.245.176.0/20 AS19318 NJIIX-AS-1 - NEW JERSEY INTERNATIONAL INTERNET EXCHANGE LLC 66.251.128.0/24 AS33227 BLUEBRIDGE-NETWORKS - Blue Bridge Networks 66.251.133.0/24 AS33227 BLUEBRIDGE-NETWORKS - Blue Bridge Networks 66.251.134.0/24 AS33227 BLUEBRIDGE-NETWORKS - Blue Bridge Networks 66.251.136.0/21 AS33227 BLUEBRIDGE-NETWORKS - Blue Bridge Networks 66.251.140.0/24 AS33227 BLUEBRIDGE-NETWORKS - Blue Bridge Networks 66.251.141.0/24 AS33227 BLUEBRIDGE-NETWORKS - Blue Bridge Networks 66.251.142.0/24 AS33227 BLUEBRIDGE-NETWORKS - Blue Bridge Networks 66.251.143.0/24 AS3356 LEVEL3 Level 3 Communications 69.46.224.0/20 AS32592 HUNT-BROTHERS-OF-LOUISIANA-LLC - Hunt Brothers 69.46.233.0/24 AS32592 HUNT-BROTHERS-OF-LOUISIANA-LLC - Hunt Brothers 69.46.236.0/24 AS32592 HUNT-BROTHERS-OF-LOUISIANA-LLC - Hunt Brothers 70.34.112.0/20 AS27589 MOJOHOST - MOJOHOST 71.19.134.0/23 AS3313 INET-AS BT Italia S.p.A. 72.35.224.0/22 AS30097 NUWAVE - NuWave 72.35.229.0/24 AS30188 TELEVERGENCE - Televergence Solutions Inc. 72.35.232.0/21 AS30097 NUWAVE - NuWave 72.44.16.0/20 AS15054 HAMELTRONICS - Hameltronics, LLC 74.91.48.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.49.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.50.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.51.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.52.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.53.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.54.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.55.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.56.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.57.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.58.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.59.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.60.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.61.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.62.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.91.63.0/24 AS30137 SEA-BROADBAND - Sea Broadband, LLC 74.112.96.0/22 AS2828 XO-AS15 - XO Communications 74.115.124.0/23 AS46540 74.115.126.0/24 AS11260 EASTLINK-HSI - EastLink 81.22.64.0/20 AS5511 OPENTRANSIT France Telecom S.A. 82.101.160.0/19 AS5511 OPENTRANSIT France Telecom S.A. 100.104.0.0/13 AS286 KPN KPN Internet Backbone 100.112.0.0/14 AS286 KPN KPN Internet Backbone 100.116.0.0/15 AS286 KPN KPN Internet Backbone 110.34.44.0/22 AS12653 COMTONET KB Impuls Hellas S.A. 116.206.72.0/24 AS6461 MFNX MFN - Metromedia Fiber Network 116.206.85.0/24 AS6461 MFNX MFN - Metromedia Fiber Network 116.206.103.0/24 AS6461 MFNX MFN - Metromedia Fiber Network 117.120.56.0/21 AS4755 TATACOMM-AS TATA Communications formerly VSNL is Leading ISP 121.46.0.0/16 AS4134 CHINANET-BACKBONE No.31,Jin-rong Street 142.54.0.0/19 AS23498 CDSI - Cogeco Data Services LP 172.14.0.0/24 AS57871 ASTELECENTR TeleCentr Ltd. 172.15.0.0/24 AS57871 ASTELECENTR TeleCentr Ltd. 172.45.1.0/24 AS3356 LEVEL3 Level 3 Communications 172.102.0.0/22 AS4812 CHINANET-SH-AP China Telecom (Group) 172.116.0.0/24 AS7018 ATT-INTERNET4 - AT&T Services, Inc. 172.120.16.0/21 AS19891 BML-AS Bill Me Later, Inc 176.123.128.0/19 AS45054 DI-NET-AS Di-Net LLC 192.0.0.0/24 AS14745 INTERNAP-BLOCK-4 - Internap Network Services Corporation 195.35.108.0/23 AS8881 VERSATEL Versatel Deutschland GmbH 198.18.0.0/15 AS14744 INTERNAP-BLOCK-4 - Internap Network Services Corporation 198.51.100.0/24 AS14744 INTERNAP-BLOCK-4 - Internap Network Services Corporation 200.1.112.0/24 AS29754 GO2TEL GO2TEL.COM INC. 200.6.49.0/24 AS23148 TERREMARK Terremark 200.24.73.0/24 AS26061 Equant Colombia 200.53.0.0/19 AS13878 Diveo do Brasil Telecomunicacoes Ltda 200.58.248.0/21 AS27849 200.75.184.0/21 AS14754 Telgua 200.106.128.0/20 AS3257 TINET-BACKBONE Tinet SpA 200.115.112.0/20 AS3257 TINET-BACKBONE Tinet SpA 202.1.224.0/24 AS10097 FLOWCOM Flow Communications 2/541 Kent St Sydney NSW 2000 202.8.106.0/24 AS9530 SHINSEGAE-AS SHINSEGAE I&C Co., Ltd. 202.58.113.0/24 AS19161 202.83.120.0/21 AS37972 202.83.124.0/24 AS37972 202.83.125.0/24 AS37972 202.83.126.0/24 AS37972 202.94.1.0/24 AS4808 CHINA169-BJ CNCGROUP IP network China169 Beijing Province Network 202.140.128.0/19 AS9583 SIFY-AS-IN Sify Limited 202.174.125.0/24 AS9498 BBIL-AP BHARTI Airtel Ltd. 202.176.1.0/24 AS9942 COMINDICO-AP SOUL Converged Communications Australia 202.179.134.0/24 AS23966 LDN-AS-PK LINKdotNET Telecom Limited 203.0.113.0/24 AS14744 INTERNAP-BLOCK-4 - Internap Network Services Corporation 203.23.1.0/24 AS18111 NETSPEED-AS-AP Netspeed Internet Communications 203.24.38.0/24 AS18111 NETSPEED-AS-AP Netspeed Internet Communications 203.30.127.0/24 AS18111 NETSPEED-AS-AP Netspeed Internet Communications 203.32.86.0/23 AS18111 NETSPEED-AS-AP Netspeed Internet Communications 203.32.86.0/24 AS18111 NETSPEED-AS-AP Netspeed Internet Communications 203.32.87.0/24 AS18111 NETSPEED-AS-AP Netspeed Internet Communications 203.32.188.0/24 AS1221 ASN-TELSTRA Telstra Pty Ltd 203.142.219.0/24 AS45149 204.9.116.0/22 AS30097 NUWAVE - NuWave 204.10.88.0/21 AS3356 LEVEL3 Level 3 Communications 204.10.92.0/23 AS30097 NUWAVE - NuWave 204.10.94.0/23 AS30097 NUWAVE - NuWave 204.14.0.0/21 AS30693 EONIX-CORPORATION-AS-PHX01-WWW-INFINITIE-NET - Eonix Corporation 204.14.0.0/24 AS30693 EONIX-CORPORATION-AS-PHX01-WWW-INFINITIE-NET - Eonix Corporation 204.14.2.0/24 AS30693 EONIX-CORPORATION-AS-PHX01-WWW-INFINITIE-NET - Eonix Corporation 204.14.3.0/24 AS30693 EONIX-CORPORATION-AS-PHX01-WWW-INFINITIE-NET - Eonix Corporation 205.175.214.0/24 AS5583 ORANGE-BUSINESS-SERVICES-BENELUX France Telecom S.A. 206.197.184.0/24 AS23304 DATOTEL-STL-AS - Datotel LLC, a NetLabs LLC Company 207.174.131.0/24 AS26116 INDRA - Indra's Net Inc 207.174.132.0/23 AS26116 INDRA - Indra's Net Inc 207.174.152.0/23 AS26116 INDRA - Indra's Net Inc 207.174.154.0/24 AS26116 INDRA - Indra's Net Inc 207.174.155.0/24 AS26116 INDRA - Indra's Net Inc 207.174.200.0/24 AS22658 EARTHNET - Earthnet, Inc. 207.174.248.0/21 AS6653 PRIVATEI - privateI, LLC 207.231.96.0/19 AS11194 NUNETPA - NuNet Inc. 208.83.53.0/24 AS40569 YGOMI-AS - Ygomi LLC 208.93.144.0/21 AS30693 EONIX-CORPORATION-AS-PHX01-WWW-INFINITIE-NET - Eonix Corporation 208.93.151.0/24 AS30693 EONIX-CORPORATION-AS-PHX01-WWW-INFINITIE-NET - Eonix Corporation 209.148.64.0/19 AS13773 TELNETCOMM - Telnet Communications 209.177.64.0/20 AS6461 MFNX MFN - Metromedia Fiber Network 209.213.0.0/20 AS33005 ELTOPIA - Eltopia.com, LLC 213.150.202.0/24 AS8513 SKYVISION SkyVision Global Networks Ltd 213.150.204.0/24 AS29338 AFOL-AS Used by Africaonline Operations 216.12.160.0/20 AS26627 AS-PILOSOFT - Pilosoft, Inc. 216.21.160.0/20 AS27876 American Data Networks 216.146.0.0/19 AS11915 TELWEST-NETWORK-SVCS-STATIC - TEL WEST COMMUNICATIONS LLC 216.194.160.0/20 AS27876 American Data Networks Please see http://www.cidr-report.org for the full report ------------------------------------ Copies of this report are mailed to: nanog(a)nanog.org eof-list(a)ripe.net apops(a)apops.net routing-wg(a)ripe.net afnog(a)afnog.org

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Weekly Routing Table Report
by Routing Analysis Role Account 27 Jul '12

27 Jul '12

This is an automated weekly mailing describing the state of the Internet Routing Table as seen from APNIC's router in Japan. The posting is sent to APOPS, NANOG, AfNOG, AusNOG, SANOG, PacNOG, LacNOG, TRNOG, CaribNOG and the RIPE Routing Working Group. Daily listings are sent to bgp-stats(a)lists.apnic.net For historical data, please see http://thyme.rand.apnic.net. If you have any comments please contact Philip Smith <pfsinoz(a)gmail.com>. Routing Table Report 04:00 +10GMT Sat 28 Jul, 2012 Report Website: http://thyme.rand.apnic.net Detailed Analysis: http://thyme.rand.apnic.net/current/ Analysis Summary ---------------- BGP routing table entries examined: 419174 Prefixes after maximum aggregation: 176627 Deaggregation factor: 2.37 Unique aggregates announced to Internet: 204455 Total ASes present in the Internet Routing Table: 41639 Prefixes per ASN: 10.07 Origin-only ASes present in the Internet Routing Table: 33374 Origin ASes announcing only one prefix: 15702 Transit ASes present in the Internet Routing Table: 5601 Transit-only ASes present in the Internet Routing Table: 136 Average AS path length visible in the Internet Routing Table: 4.6 Max AS path length visible: 32 Max AS path prepend of ASN ( 48687) 24 Prefixes from unregistered ASNs in the Routing Table: 382 Unregistered ASNs in the Routing Table: 146 Number of 32-bit ASNs allocated by the RIRs: 3041 Number of 32-bit ASNs visible in the Routing Table: 2664 Prefixes from 32-bit ASNs in the Routing Table: 6906 Special use prefixes present in the Routing Table: 1 Prefixes being announced from unallocated address space: 170 Number of addresses announced to Internet: 2582312876 Equivalent to 153 /8s, 234 /16s and 247 /24s Percentage of available address space announced: 69.7 Percentage of allocated address space announced: 69.7 Percentage of available address space allocated: 99.9 Percentage of address space in use by end-sites: 93.1 Total number of prefixes smaller than registry allocations: 146088 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 102575 Total APNIC prefixes after maximum aggregation: 32799 APNIC Deaggregation factor: 3.13 Prefixes being announced from the APNIC address blocks: 103070 Unique aggregates announced from the APNIC address blocks: 42296 APNIC Region origin ASes present in the Internet Routing Table: 4721 APNIC Prefixes per ASN: 21.83 APNIC Region origin ASes announcing only one prefix: 1238 APNIC Region transit ASes present in the Internet Routing Table: 754 Average APNIC Region AS path length visible: 4.6 Max APNIC Region AS path length visible: 26 Number of APNIC region 32-bit ASNs visible in the Routing Table: 259 Number of APNIC addresses announced to Internet: 705852800 Equivalent to 42 /8s, 18 /16s and 117 /24s Percentage of available APNIC address space announced: 82.5 APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431 (pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319, 58368-59391, 131072-133119 APNIC Address Blocks 1/8, 14/8, 27/8, 36/8, 39/8, 42/8, 43/8, 49/8, 58/8, 59/8, 60/8, 61/8, 101/8, 103/8, 106/8, 110/8, 111/8, 112/8, 113/8, 114/8, 115/8, 116/8, 117/8, 118/8, 119/8, 120/8, 121/8, 122/8, 123/8, 124/8, 125/8, 126/8, 133/8, 150/8, 153/8, 163/8, 171/8, 175/8, 180/8, 182/8, 183/8, 202/8, 203/8, 210/8, 211/8, 218/8, 219/8, 220/8, 221/8, 222/8, 223/8, ARIN Region Analysis Summary ---------------------------- Prefixes being announced by ARIN Region ASes: 153020 Total ARIN prefixes after maximum aggregation: 77710 ARIN Deaggregation factor: 1.97 Prefixes being announced from the ARIN address blocks: 154089 Unique aggregates announced from the ARIN address blocks: 68810 ARIN Region origin ASes present in the Internet Routing Table: 15208 ARIN Prefixes per ASN: 10.13 ARIN Region origin ASes announcing only one prefix: 5776 ARIN Region transit ASes present in the Internet Routing Table: 1608 Average ARIN Region AS path length visible: 4.1 Max ARIN Region AS path length visible: 24 Number of ARIN region 32-bit ASNs visible in the Routing Table: 16 Number of ARIN addresses announced to Internet: 1083040640 Equivalent to 64 /8s, 141 /16s and 227 /24s Percentage of available ARIN address space announced: 57.3 ARIN AS Blocks 1-1876, 1902-2042, 2044-2046, 2048-2106 (pre-ERX allocations) 2138-2584, 2615-2772, 2823-2829, 2880-3153 3354-4607, 4865-5119, 5632-6655, 6912-7466 7723-8191, 10240-12287, 13312-15359, 16384-17407 18432-20479, 21504-23551, 25600-26591, 26624-27647, 29696-30719, 31744-33791 35840-36863, 39936-40959, 46080-47103 53248-55295, 393216-394239 ARIN Address Blocks 3/8, 4/8, 6/8, 7/8, 8/8, 9/8, 11/8, 12/8, 13/8, 15/8, 16/8, 17/8, 18/8, 19/8, 20/8, 21/8, 22/8, 23/8, 24/8, 26/8, 28/8, 29/8, 30/8, 32/8, 33/8, 34/8, 35/8, 38/8, 40/8, 44/8, 45/8, 47/8, 48/8, 50/8, 52/8, 53/8, 54/8, 55/8, 56/8, 57/8, 63/8, 64/8, 65/8, 66/8, 67/8, 68/8, 69/8, 70/8, 71/8, 72/8, 73/8, 74/8, 75/8, 76/8, 96/8, 97/8, 98/8, 99/8, 100/8, 104/8, 107/8, 108/8, 128/8, 129/8, 130/8, 131/8, 132/8, 134/8, 135/8, 136/8, 137/8, 138/8, 139/8, 140/8, 142/8, 143/8, 144/8, 146/8, 147/8, 148/8, 149/8, 152/8, 155/8, 156/8, 157/8, 158/8, 159/8, 160/8, 161/8, 162/8, 164/8, 165/8, 166/8, 167/8, 168/8, 169/8, 170/8, 172/8, 173/8, 174/8, 184/8, 192/8, 198/8, 199/8, 204/8, 205/8, 206/8, 207/8, 208/8, 209/8, 214/8, 215/8, 216/8, RIPE Region Analysis Summary ---------------------------- Prefixes being announced by RIPE Region ASes: 104106 Total RIPE prefixes after maximum aggregation: 55508 RIPE Deaggregation factor: 1.88 Prefixes being announced from the RIPE address blocks: 106284 Unique aggregates announced from the RIPE address blocks: 67918 RIPE Region origin ASes present in the Internet Routing Table: 16711 RIPE Prefixes per ASN: 6.36 RIPE Region origin ASes announcing only one prefix: 8098 RIPE Region transit ASes present in the Internet Routing Table: 2716 Average RIPE Region AS path length visible: 5.1 Max RIPE Region AS path length visible: 32 Number of RIPE region 32-bit ASNs visible in the Routing Table: 1746 Number of RIPE addresses announced to Internet: 637676548 Equivalent to 38 /8s, 2 /16s and 44 /24s Percentage of available RIPE address space announced: 92.7 RIPE AS Blocks 1877-1901, 2043, 2047, 2107-2136, 2585-2614 (pre-ERX allocations) 2773-2822, 2830-2879, 3154-3353, 5377-5631 6656-6911, 8192-9215, 12288-13311, 15360-16383 20480-21503, 24576-25599, 28672-29695 30720-31743, 33792-35839, 38912-39935 40960-45055, 47104-52223, 56320-58367 59392-61439, 196608-199679 RIPE Address Blocks 2/8, 5/8, 25/8, 31/8, 37/8, 46/8, 51/8, 62/8, 77/8, 78/8, 79/8, 80/8, 81/8, 82/8, 83/8, 84/8, 85/8, 86/8, 87/8, 88/8, 89/8, 90/8, 91/8, 92/8, 93/8, 94/8, 95/8, 109/8, 141/8, 145/8, 151/8, 176/8, 178/8, 185/8, 188/8, 193/8, 194/8, 195/8, 212/8, 213/8, 217/8, LACNIC Region Analysis Summary ------------------------------ Prefixes being announced by LACNIC Region ASes: 42912 Total LACNIC prefixes after maximum aggregation: 8381 LACNIC Deaggregation factor: 5.12 Prefixes being announced from the LACNIC address blocks: 45634 Unique aggregates announced from the LACNIC address blocks: 21883 LACNIC Region origin ASes present in the Internet Routing Table: 1616 LACNIC Prefixes per ASN: 28.24 LACNIC Region origin ASes announcing only one prefix: 424 LACNIC Region transit ASes present in the Internet Routing Table: 313 Average LACNIC Region AS path length visible: 4.8 Max LACNIC Region AS path length visible: 25 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 637 Number of LACNIC addresses announced to Internet: 113013416 Equivalent to 6 /8s, 188 /16s and 114 /24s Percentage of available LACNIC address space announced: 67.4 LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247, 262144-263167 plus ERX transfers LACNIC Address Blocks 177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8, 191/8, 200/8, 201/8, AfriNIC Region Analysis Summary ------------------------------- Prefixes being announced by AfriNIC Region ASes: 9495 Total AfriNIC prefixes after maximum aggregation: 2175 AfriNIC Deaggregation factor: 4.37 Prefixes being announced from the AfriNIC address blocks: 9927 Unique aggregates announced from the AfriNIC address blocks: 3399 AfriNIC Region origin ASes present in the Internet Routing Table: 550 AfriNIC Prefixes per ASN: 18.05 AfriNIC Region origin ASes announcing only one prefix: 166 AfriNIC Region transit ASes present in the Internet Routing Table: 120 Average AfriNIC Region AS path length visible: 4.4 Max AfriNIC Region AS path length visible: 25 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 6 Number of AfriNIC addresses announced to Internet: 41353984 Equivalent to 2 /8s, 119 /16s and 3 /24s Percentage of available AfriNIC address space announced: 41.1 AfriNIC AS Blocks 36864-37887, 327680-328703 & ERX transfers AfriNIC Address Blocks 41/8, 102/8, 105/8, 154/8, 196/8, 197/8, APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 4766 2759 11123 1252 Korea Telecom (KIX) 17974 2274 569 90 PT TELEKOMUNIKASI INDONESIA 7545 1703 301 86 TPG Internet Pty Ltd 4755 1614 388 163 TATA Communications formerly 9829 1306 1085 26 BSNL National Internet Backbo 9583 1160 87 508 Sify Limited 7552 1128 1062 11 Vietel Corporation 4808 1117 2052 317 CNCGROUP IP network: China169 24560 1038 385 165 Bharti Airtel Ltd., Telemedia 9498 991 294 73 BHARTI Airtel Ltd. Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 7029 3412 986 155 Windstream Communications Inc 6389 3383 3773 186 bellsouth.net, inc. 18566 2088 382 181 Covad Communications 1785 1939 681 130 PaeTec Communications, Inc. 22773 1698 2914 125 Cox Communications, Inc. 20115 1647 1570 611 Charter Communications 4323 1575 1028 383 Time Warner Telecom 30036 1404 274 788 Mediacom Communications Corp 7018 1255 10040 822 AT&T WorldNet Services 11492 1192 217 350 Cable One Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 8402 1595 544 16 Corbina telecom 12479 808 749 92 Uni2 Autonomous System 34984 735 189 177 BILISIM TELEKOM 6830 715 2310 446 UPC Distribution Services 20940 707 228 554 Akamai Technologies European 31148 706 37 9 FreeNet ISP 2118 632 97 14 EUnet/RELCOM Autonomous Syste 13188 613 100 9 Educational Network 8551 579 364 61 Bezeq International 3320 502 8443 411 Deutsche Telekom AG Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 28573 2044 1226 58 NET Servicos de Comunicao S.A 10620 2030 349 213 TVCABLE BOGOTA 6503 1527 419 67 AVANTEL, S.A. 8151 1470 3069 350 UniNet S.A. de C.V. 7303 1458 934 196 Telecom Argentina Stet-France 6458 882 81 15 GUATEL 27947 719 74 95 Telconet S.A 11172 644 91 75 Servicios Alestra S.A de C.V 3816 597 250 84 Empresa Nacional de Telecomun 22047 583 326 15 VTR PUNTO NET S.A. Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 8452 1030 958 13 TEDATA 24863 859 274 32 LINKdotNET AS number 6713 509 650 19 Itissalat Al-MAGHRIB 36998 483 48 3 MOBITEL 24835 286 80 8 RAYA Telecom - Egypt 3741 262 905 223 The Internet Solution 12258 197 28 62 Vodacom Internet Company 29975 191 667 21 Vodacom 16637 170 680 87 MTN Network Solutions 15706 160 32 6 Sudatel Internet Exchange Aut Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 7029 3412 986 155 Windstream Communications Inc 6389 3383 3773 186 bellsouth.net, inc. 4766 2759 11123 1252 Korea Telecom (KIX) 17974 2274 569 90 PT TELEKOMUNIKASI INDONESIA 18566 2088 382 181 Covad Communications 28573 2044 1226 58 NET Servicos de Comunicao S.A 10620 2030 349 213 TVCABLE BOGOTA 1785 1939 681 130 PaeTec Communications, Inc. 7545 1703 301 86 TPG Internet Pty Ltd 22773 1698 2914 125 Cox Communications, Inc. Complete listing at http://thyme.rand.apnic.net/current/data-ASnet Global Per AS Maximum Aggr summary ---------------------------------- ASN No of nets Net Savings Description 6389 3383 3197 bellsouth.net, inc. 17974 2274 2184 PT TELEKOMUNIKASI INDONESIA 28573 2044 1986 NET Servicos de Comunicao S.A 18566 2088 1907 Covad Communications 10620 2030 1817 TVCABLE BOGOTA 1785 1939 1809 PaeTec Communications, Inc. 7545 1703 1617 TPG Internet Pty Ltd 8402 1595 1579 Corbina telecom 22773 1698 1573 Cox Communications, Inc. 4766 2759 1507 Korea Telecom (KIX) Complete listing at http://thyme.rand.apnic.net/current/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Network Transit AS Description 59407 UNALLOCATED 5.134.16.0/21 51167 Giga-Hosting GmbH 59457 UNALLOCATED 5.149.64.0/24 35567 DASTO semtel d.o.o. 59457 UNALLOCATED 5.149.64.0/19 35567 DASTO semtel d.o.o. 59457 UNALLOCATED 5.149.65.0/24 35567 DASTO semtel d.o.o. 59457 UNALLOCATED 5.149.66.0/24 35567 DASTO semtel d.o.o. 59473 UNALLOCATED 5.149.152.0/22 44843 AmsterdamTelecom Ltd 59473 UNALLOCATED 5.149.156.0/23 44843 AmsterdamTelecom Ltd 15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic 25639 UNALLOCATED 12.41.169.0/24 7018 AT&T WorldNet Servic 13317 UNALLOCATED 12.44.10.0/24 7018 AT&T WorldNet Servic Complete listing at http://thyme.rand.apnic.net/current/data-badAS Prefixes from private and non-routed address space (Global) ----------------------------------------------------------- Prefix Origin AS Description 198.18.0.0/15 14744 Internap Network Services Complete listing at http://thyme.rand.apnic.net/current/data-dsua Advertised Unallocated Addresses -------------------------------- Network Origin AS Description 5.10.8.0/21 57154 Stadtwerke Konstanz GmbH 5.10.40.0/21 12466 BICOS.NET Autonomous System 5.10.48.0/20 29562 Kabel Baden-Wuerttemberg GmbH 5.158.96.0/19 38934 Pride Limited 5.158.200.0/21 23456 32-bit ASN transition 5.158.208.0/21 2914 Verio, Inc. 5.159.40.0/21 23456 32-bit ASN transition 14.192.0.0/22 45464 Room 201, TGU Bldg 14.192.4.0/22 45464 Room 201, TGU Bldg 14.192.8.0/22 45464 Room 201, TGU Bldg Complete listing at http://thyme.rand.apnic.net/current/data-add-IANA Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:19 /9:13 /10:28 /11:83 /12:236 /13:475 /14:848 /15:1529 /16:12304 /17:6362 /18:10763 /19:20931 /20:29897 /21:31764 /22:41424 /23:39675 /24:219022 /25:1215 /26:1472 /27:850 /28:162 /29:60 /30:18 /31:0 /32:24 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 7029 2773 3412 Windstream Communications Inc 18566 2038 2088 Covad Communications 6389 1864 3383 bellsouth.net, inc. 30036 1339 1404 Mediacom Communications Corp 8402 1292 1595 Corbina telecom 11492 1155 1192 Cable One 22773 1122 1698 Cox Communications, Inc. 6503 1051 1527 AVANTEL, S.A. 1785 1048 1939 PaeTec Communications, Inc. 7011 930 1191 Citizens Utilities Complete listing at http://thyme.rand.apnic.net/current/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:564 2:688 3:1 4:13 5:239 6:3 8:440 12:2008 13:1 14:635 15:11 16:3 17:6 20:24 23:202 24:1796 27:1320 31:1018 32:56 33:2 34:2 36:8 37:672 38:824 39:1 40:134 41:2848 42:158 44:3 46:1551 47:2 49:429 50:569 52:13 54:14 55:8 56:1 57:31 58:983 59:532 60:237 61:1359 62:928 63:2029 64:4241 65:2241 66:4513 67:2021 68:1155 69:3201 70:986 71:520 72:1870 74:2604 75:489 76:335 77:938 78:938 79:492 80:1233 81:948 82:642 83:539 84:511 85:1161 86:451 87:931 88:346 89:1764 90:303 91:5063 92:585 93:1307 94:1564 95:1236 96:401 97:318 98:887 99:39 100:21 101:258 103:1324 105:464 106:115 107:189 108:404 109:1464 110:793 111:943 112:431 113:681 114:667 115:925 116:924 117:737 118:922 119:1236 120:357 121:806 122:1667 123:1156 124:1380 125:1259 128:556 129:185 130:266 131:638 132:298 133:22 134:245 135:61 136:215 137:240 138:342 139:184 140:495 141:254 142:437 143:370 144:496 145:77 146:509 147:288 148:767 149:319 150:153 151:186 152:473 153:176 154:19 155:402 156:222 157:382 158:190 159:626 160:344 161:280 162:383 163:189 164:674 165:412 166:585 167:535 168:956 169:127 170:899 171:147 172:5 173:1736 174:605 175:435 176:574 177:998 178:1652 180:1327 181:113 182:1044 183:207 184:559 186:2044 187:1094 188:1379 189:1584 190:6148 192:6021 193:5431 194:4192 195:3207 196:1207 197:184 198:3682 199:4936 200:5994 201:1980 202:8727 203:8671 204:4392 205:2531 206:2794 207:2831 208:4052 209:3632 210:2771 211:1565 212:2042 213:1801 214:875 215:86 216:5073 217:1565 218:562 219:338 220:1233 221:572 222:335 223:350 End of report

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BGP Update Report
by cidr-report＠potaroo.net 27 Jul '12

27 Jul '12

BGP Update Report Interval: 21-Jul-12 -to- 25-Jul-12 (4 days) Observation Point: BGP Peering with AS131072 TOP 20 Unstable Origin AS Rank ASN Upds % Upds/Pfx AS-Name 1 - AS8402 31474 1.4% 17.8 -- CORBINA-AS OJSC "Vimpelcom" 2 - AS1637 30729 1.4% 284.5 -- DNIC-AS-01637 - Headquarters, USAISC 3 - AS17813 29341 1.3% 215.7 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 4 - AS47931 25100 1.1% 204.1 -- ALENETWORK A.L.E. COM NETWORK S.R.L 5 - AS9829 21569 0.9% 16.5 -- BSNL-NIB National Internet Backbone 6 - AS24560 19759 0.9% 19.1 -- AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services 7 - AS7029 15412 0.7% 4.4 -- WINDSTREAM - Windstream Communications Inc 8 - AS7552 13226 0.6% 11.7 -- VIETEL-AS-AP Vietel Corporation 9 - AS13118 11776 0.5% 245.3 -- ASN-YARTELECOM OJSC Rostelecom 10 - AS6458 11752 0.5% 13.3 -- Telgua 11 - AS27738 11509 0.5% 20.7 -- Ecuadortelecom S.A. 12 - AS48277 11271 0.5% 201.3 -- SOREX SOREX MEDIA S.R.L. 13 - AS49074 10768 0.5% 219.8 -- TECHNOLOGICAL SC TECHNOLOGICAL SRL 14 - AS6389 10345 0.5% 3.1 -- BELLSOUTH-NET-BLK - BellSouth.net Inc. 15 - AS28573 9562 0.4% 4.7 -- NET Servicos de Comunicao S.A. 16 - AS10620 9514 0.4% 4.7 -- Telmex Colombia S.A. 17 - AS5800 8667 0.4% 33.6 -- DNIC-ASBLK-05800-06055 - DoD Network Information Center 18 - AS4766 8347 0.4% 3.0 -- KIXS-AS-KR Korea Telecom 19 - AS8151 8307 0.4% 5.6 -- Uninet S.A. de C.V. 20 - AS43875 8261 0.4% 206.5 -- DATAINFO-ASN SC Data Media Info SRL TOP 20 Unstable Origin AS (Updates per announced prefix) Rank ASN Upds % Upds/Pfx AS-Name 1 - AS16535 3364 0.1% 1121.3 -- ECHOS-3 - Echostar Holding Purchasing Corporation 2 - AS44410 2654 0.1% 884.7 -- ENTEKHAB-AS ENTEKHAB INDUSTRIAL GROUP 3 - AS43348 1752 0.1% 876.0 -- TATARINOVA-AS PE Tatarinova Alla Ivanovna 4 - AS49072 837 0.0% 837.0 -- APSUARA-AS TCA Apsuara Ltd. 5 - AS54037 770 0.0% 770.0 -- CAREER-GROUP-INC - CAREER GROUP INC 6 - AS14452 6312 0.3% 701.3 -- IOS-ASN - INTERNET OF THE SANDHILLS 7 - AS26184 645 0.0% 645.0 -- ASA-HQAS - American Society of Anesthesiologists 8 - AS58655 1160 0.1% 580.0 -- SKYTEL6-BD SkyTel Communications Limited 9 - AS51250 552 0.0% 552.0 -- ITE-PROTON-AS "Information technologies enterprise "Proton" LTD 10 - AS3 440 0.0% 759.0 -- RESENNET-AS ResenNet Aps 11 - AS42806 411 0.0% 411.0 -- TELECOM-AS Telecom Georgia 12 - AS38857 775 0.0% 387.5 -- ESOFT-TRANSIT-AS-AP e.Soft Technologies Ltd. 13 - AS23007 888 0.0% 296.0 -- Universidad de Los Andes 14 - AS4 296 0.0% 51.0 -- COMUNICALO DE MEXICO S.A. DE C.V 15 - AS27890 576 0.0% 288.0 -- Universidad de Oriente 16 - AS1637 30729 1.4% 284.5 -- DNIC-AS-01637 - Headquarters, USAISC 17 - AS23237 1117 0.1% 279.2 -- MCMASTER - McMaster University 18 - AS29398 277 0.0% 277.0 -- PETROBALTIC "Petrobaltic" S.A. 19 - AS34744 5440 0.2% 247.3 -- GVM S.C. GVM SISTEM 2003 S.R.L. 20 - AS50704 1723 0.1% 246.1 -- BENEFIC-INTERNET Benefic Consult SRL TOP 20 Unstable Prefixes Rank Prefix Upds % Origin AS -- AS Name 1 - 109.161.64.0/19 11364 0.5% AS13118 -- ASN-YARTELECOM OJSC Rostelecom 2 - 59.176.0.0/14 6407 0.3% AS17813 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 3 - 182.64.0.0/16 6060 0.3% AS24560 -- AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services 4 - 122.161.0.0/16 6034 0.3% AS24560 -- AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services 5 - 200.46.0.0/19 5790 0.2% AS21599 -- NETDIRECT S.A. 6 - 59.177.0.0/16 4822 0.2% AS17813 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 7 - 202.56.215.0/24 3646 0.1% AS24560 -- AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services 8 - 67.47.194.0/23 3358 0.1% AS16535 -- ECHOS-3 - Echostar Holding Purchasing Corporation 9 - 59.177.0.0/18 3349 0.1% AS17813 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 10 - 123.252.208.0/24 3197 0.1% AS17762 -- HTIL-TTML-IN-AP Tata Teleservices Maharashtra Ltd 11 - 59.177.48.0/20 3103 0.1% AS17813 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 12 - 139.139.19.0/24 3086 0.1% AS1562 -- DNIC-ASBLK-01550-01601 - DoD Network Information Center 13 - 194.63.9.0/24 2924 0.1% AS1273 -- CW Cable and Wireless Worldwide plc 14 - 65.82.30.0/24 2511 0.1% AS6197 -- BATI-ATL - BellSouth Network Solutions, Inc 15 - 69.38.178.0/24 2427 0.1% AS19406 -- TWRS-MA - Towerstream I, Inc. 16 - 115.170.128.0/17 1829 0.1% AS4847 -- CNIX-AP China Networks Inter-Exchange 17 - 59.177.0.0/19 1819 0.1% AS17813 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 18 - 59.177.64.0/18 1695 0.1% AS17813 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 19 - 59.177.144.0/20 1630 0.1% AS17813 -- MTNL-AP Mahanagar Telephone Nigam Ltd. 20 - 78.111.6.0/23 1575 0.1% AS44410 -- ENTEKHAB-AS ENTEKHAB INDUSTRIAL GROUP Details at http://bgpupdates.potaroo.net ------------------------------------ Copies of this report are mailed to: nanog(a)nanog.org eof-list(a)ripe.net apops(a)apops.net routing-wg(a)ripe.net afnog(a)afnog.org

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Route flap damping considered usable
by Rob Evans 26 Jul '12

26 Jul '12

All, Those of you that were in Ljubljana will have seen Randy Bush's presentation 'Route Flap Damping Made Useful.' Based on the work behind this, Randy, Cristel Pelsser, Mirjam Kuehne and myself have produced the following document which we'd like to publish as a document of this working group. Please have a look and discuss on this list. I'd also like to remind you that we'll be meeting nine weeks from today in Amsterdam at RIPE65. I should be allowed out for this meeting, so if you have any suggestions for what you'd like to see on the working group's agenda, please send it to Joao and myself via <routing-wg-chairs(a)ripe.net>. Hope you're having a good summer! Rob RIPE Routing Working Group Recommendations on Route Flap Damping Introduction Route Flap Damping (RFD) [1] is a mechanism for BGP speaking routers that penalises prefixes that exhibit a large number of updates (‘flapping’), and suppresses a route when the accumulated penalty exceeds a given threshold. The penalty decays over time until it reaches a lower threshold at which point the route is unsuppressed. RFD is intended to improve the overall stability of the Internet routing table and reduce the load on BGP speaking routers. In ripe-378 [2] it was stated that due to the dynamics of BGP, especially a phenomenon called ‘path hunting,’ the default configurations of flap damping can do more harm than good as it may suppress a prefix after it has only flapped a few times. Consequently RFD was deprecated due to the problem of over damping (see [2] for more details). A small number of prefixes on the Internet continue to flap rapidly and cause a disproportionate number of updates to BGP and load on BGP speaking routers, this document uses experimental data gathered from an operational environment to suggest changes to the RFD parameters to suppress the prefixes that flap the most, while minimising the suppression of other prefixes. This document suggests parameters which would make RFD usable and is based around the work of Cristel Pelsser, Olaf Maennel, Pradosh Mohapatra, Randy Bush, and Keyur Patel presented at PAM2011[3]. History and Background In the early 1990s the accelerating growth in the number of prefixes being announced to the Internet (often due to inadequate prefix aggregation), the denser meshing through multiple inter-provider paths, and increased instabilities started to cause significant impact on the performance and efficiency of some Internet backbone routers. Every time a routing prefix altered state because of a single line-flap, the withdrawal was advertised to the whole BGP-Speaking Zone (BSZ) and handled by every router that carried the full Internet routing table. The load this processing placed on the control planes of routers caused further instability as the routers were not able to process other BGP updates or they dropped traffic transiting the device. This could produce cyclic crashing behaviour. To overcome this situation RFD was developed in 1993 and has since been integrated into most router BGP software implementations. RFD is described in detail in RFC 2439[1]. When RFD was first implemented in commercial routers, vendor implementations had different default values and different characteristics. As this inconsistency would result in different rates of flap damping, and therefore introduce inconsistent path selection and behavior that was hard to diagnose, the operator community introduced a consistent set of recommendations for flap damping parameters, so that ISPs deploying RFD would treat flapping prefixes in the same way. This call for consistency resulted in the RIPE Routing Working Group producing first ripe-178, then ripe-210, and finally the ripe-229 documents [2a]. The parameters documented in ripe-229 were considered, at time of publication in 2001, the best current practice. In 2006, this was reviewed again and resulted in ripe-378 [2] which recommended to disable RFD because it created more harm than good. Analysis In the work by Pelsser et al [3], it is shown that 3% of all prefixes cause 36% of BGP updates, and just 0.01% of the prefixes cause 10% of the BGP updates. The aim is to only penalise those prefixes with excessive numbers of updates. The default values used in current implementations of RFD apply a penalty of 1000 each time a route flaps, and suppresses the prefix when the penalty exceeds a figure in the region of 2000 (Cisco IOS) or 3000 (Juniper JunOS). The table shows the percentage of prefixes above the suppress threshold and the percentage reduction in BGP churn for various values of suppress threshold. The current default suppress value of 2000 reduces BGP churn by 47%, but it suppressed 14% of the prefixes at some point over the lifetime of the experiment. Significantly larger values of suppress threshold such as 12000, 15000 or 18000 still reduced BGP churn, but suppressed far fewer prefixes which it is believed reduces the risk of penalising otherwise well-behaved prefixes. Suppress % prefixes % reduction in BGP churn Threshold suppressed compared with no damping 2000 14 47 4000 4.2 26 6000 2.1 19 12000 0.63 11.26 15000 0.44 9.51 18000 0.32 8.12 Recommendations In order to punish the biggest offenders - those prefixes that flap the most – yet without punishing others, the RIPE Routing-WG recommends vendors raise the maximum suppress threshold in router implementations to 50,000 and operators configure a suppress threshold value of at least 6,000. The vendors might also change the default suppress threshold to 6,000. But this might surprise operators who use the defult. This has a number of advantages: • it is easy to implement • it will reduce the churn compared to the situation we have now where no RFD is applied • it spares the smaller offenders. Changing the default suppress threshold could result in an increase in forwarding table size or announcement rate for operators who use RFD with the default settings. This warrants further discussion. References [1] Curtis Villamizar, Ravi Chandra, Ramesh Govindan RFC2439: BGP Route-flap Damping (Proposed Standard) <ftp://ftp.ietf.org/rfc/rfc2439.txt> [2] Most recent RIPE Document <ftp://ftp.ripe.net/ripe/docs/ripe-378.txt> [2a] Older RIPE Documents <ftp://ftp.ripe.net/ripe/docs/ripe-178.txt> <ftp://ftp.ripe.net/ripe/docs/ripe-210.txt> <ftp://ftp.ripe.net/ripe/docs/ripe-229.txt> [3] Cristel Pelsser, Olaf Maennel, Pradosh Mohapatra, Randy Bush and Keyur Patel. "Route Flap Damping Made Usable". PAM 2011, March 2011. <http://www.iij-ii.co.jp/en/lab/researchers/cristel/publications/Pelsser-RFD…> [4] Zhouqing Mao, Ramesh Govindan, George Varghese, Randy Katz Route-flap Damping Exacerbates Internet Routing Congerence SIGCOMM 2002 <http://www.eecs.umich.edu/~zmao/Papers/sig02.pdf> [5] Randy Bush, Tim Griffin, Zhouqing Mao Route-flap Damping: Harmful? NANOG 26 <http://www.nanog.org/mtg-0210/ppt/flap.pdf> [6] Craig Labovitz, Abha Ahuja, Abhijit Bose, Farnam Jihanian Delayed Internet Routing Convergence SIGCOMM 2000 <http://www.acm.org/sigs/sigcomm/sigcomm2000/conf/paper/sigcomm2000-5-2.pdf>

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