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August 2002

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The Cidr Report
by CIDR Report 03 Aug '02

03 Aug '02

This is an auto-generated mail on Fri Aug 2 23:00:00 PDT 2002 It is not checked before it leaves my workstation. However, hopefully you will find this report interesting and will take the time to look through this to see if you can improve the amount of aggregation you perform. Check http://www.employees.org/~tbates/cidr-report.html for a daily update of this report. NEW: Check http://www.employees.org/~tbates/cidr-report-region.html for the regional version of this report. NEW: Check http://www.employees.org/~tbates/autnums.html for a complete list of autonomous system number to name mappings as used by the CIDR-Report. The report is split into sections: 0) General Status List the route table history for the last week, list any possibly bogus routes seen and give some status on ASes. 1) Gains by aggregating at the origin AS level This lists the "Top 30" players who if they decided to aggregate their announced classful prefixes at the origin AS level could make a significant difference in the reduction of the current size of the Internet routing table. This calculation does not take into account the inclusion of holes when forming an aggregate so it is possible even larger reduction should be possible. 2) Weekly Delta A summary of the last weeks changes in terms of withdrawn and added routes. Please note that this is only a snapshot but does give some indication of ASes participating in CIDR. Clearly, it is generally a good thing to see a large amount of withdrawls. 3) Interesting aggregates Interesting here means not an aggregate made as a set of classful routes. Thanks to GX Networks for giving me access to their routing tables once a day. Please send any comments about this report directly to CIDR Report <cidr-report(a)cisco.com>. ------------------------------------------------------------------------------ CIDR REPORT for 02Aug02 0) General Status Table History ------------- Date Prefixes 260702 112031 270702 112241 280702 112472 290702 112259 300702 112104 310702 112424 010802 112379 020802 112557 Check http://www.employees.org/~tbates/cidr.plot.html for a plot of the table history. Possible Bogus Routes --------------------- AS Summary ---------- Number of ASes in routing system: 13363 Number of ASes announcing only one prefix: 8134 (4583 cidr, 3551 classful) Largest number of cidr routes: 717 announced by AS3908 Largest number of classful routes: 1212 announced by AS701 1) Gains by aggregating at the origin AS level --- 02Aug02 --- ASnum NetsNow NetsCIDR NetGain % Gain Description AS1221 1085 835 250 23.0% Telstra Pty Ltd AS701 1212 971 241 19.9% UUNET Technologies, Inc. AS17557 289 96 193 66.8% Pakistan Telecom AS6595 230 58 172 74.8% DoD Education Activity Network As AS852 540 403 137 25.4% Telus Advanced Communications AS7018 809 682 127 15.7% AT&T AS16473 195 77 118 60.5% Bell South AS1239 516 419 97 18.8% Sprint AS4151 237 142 95 40.1% USDA AS19632 99 5 94 94.9% Metropolis Intercom S.A. AS12302 120 27 93 77.5% MobiFon S.A. AS7303 163 71 92 56.4% Telecom Argentina Stet-France Tel AS16814 105 20 85 81.0% NSS, S.A. AS226 170 87 83 48.8% Los Nettos AS2048 178 103 75 42.1% State of Louisiana AS7046 294 220 74 25.2% UUNET Technologies, Inc. AS577 266 192 74 27.8% Bell Advanced Communications Inc. AS4755 204 131 73 35.8% Videsh Sanchar Nigam Ltd. Autonom AS4323 410 339 71 17.3% Time Warner Communications, Inc. AS2149 327 257 70 21.4% Performance Systems, Inc. AS724 219 157 62 28.3% DLA Systems Automation Center AS4293 246 185 61 24.8% Cable & Wireless USA AS3464 163 103 60 36.8% Alabama SuperComputer Network AS19834 64 4 60 93.8% NetForce, Inc. AS10620 85 25 60 70.6% TVCABLE BOGOTA AS1 442 384 58 13.1% GENUITY AS5515 243 186 57 23.5% Sonera Finland Autonomous System AS209 312 255 57 18.3% Qwest AS16758 63 6 57 90.5% IKON Office Solutions AS9498 85 29 56 65.9% BHARTI BT INTERNET LTD. Total 55365 42608 12757 23.0% For the rest of the previous weeks gain information please see http://www.employees.org:80/~tbates/cidr-report.html 2) Weekly Delta Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report 3) Interesting aggregates Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report

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Weekly Routing Table Report
by Routing Table Analysis 02 Aug '02

02 Aug '02

This is an automated weekly mailing describing the state of the Internet Routing Table as seen from APNIC's router in Japan. Daily listings are sent to bgp-stats(a)lists.apnic.net For a graphical representation, please see http://www.apnic.net/stats/bgp. If you have any comments please contact Philip Smith <pfs(a)cisco.com>. Routing Table Report 20:00 +10GMT Fri 02 Aug, 2002 Analysis Summary ---------------- BGP routing table entries examined: 114554 Prefixes after maximum aggregation: 74000 Unique aggregates announced to Internet: 54612 Total ASes present in the Internet Routing Table: 13482 Origin-only ASes present in the Internet Routing Table: 11667 Origin ASes announcing only one prefix: 5179 Transit ASes present in the Internet Routing Table: 1815 Transit-only ASes present in the Internet Routing Table: 51 Average AS path length visible in the Internet Routing Table: 5.4 Max AS path length visible: 23 Illegal AS announcements present in the Routing Table: 1 Non-routable prefixes present in the Routing Table: 0 Prefixes being announced from the IANA Reserved Address blocks: 36 Number of addresses announced to Internet: 1190731541 Equivalent to 70 /8s, 249 /16s and 31 /24s Percentage of available address space announced: 32.1 Percentage of allocated address space announced: 59.4 Percentage of available address space allocated: 54.1 Total number of prefixes smaller than registry allocations: 46631 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 18897 Total APNIC prefixes after maximum aggregation: 11224 Prefixes being announced from the APNIC address blocks: 17403 Unique aggregates announced from the APNIC address blocks: 10608 APNIC Region origin ASes present in the Internet Routing Table: 1581 APNIC Region origin ASes announcing only one prefix: 517 APNIC Region transit ASes present in the Internet Routing Table: 276 Average APNIC Region AS path length visible: 5.3 Max APNIC Region AS path length visible: 12 Number of APNIC addresses announced to Internet: 90250720 Equivalent to 5 /8s, 97 /16s and 29 /24s Percentage of available APNIC address space announced: 59.4 APNIC AS Blocks 4608 - 4864, 7467 - 7722, 9216 - 10239 17408 - 18431, 23552 - 24575 APNIC Address Blocks 61/8, 202/7, 210/7, 218/7 and 220/7 ARIN Region Analysis Summary ---------------------------- Prefixes being announced by ARIN Region ASes: 76161 Total ARIN prefixes after maximum aggregation: 48172 Prefixes being announced from the ARIN address blocks: 53959 Unique aggregates announced from the ARIN address blocks: 17941 ARIN Region origin ASes present in the Internet Routing Table: 7934 ARIN Region origin ASes announcing only one prefix: 2550 ARIN Region transit ASes present in the Internet Routing Table: 783 Average ARIN Region AS path length visible: 5.3 Max ARIN Region AS path length visible: 17 Number of ARIN addresses announced to Internet: 193938192 Equivalent to 11 /8s, 143 /16s and 67 /24s Percentage of available ARIN address space announced: 72.2 ARIN AS Blocks 1 - 1876, 1902 - 2042, 2044 - 2046, 2048 - 2106 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 - 26623 ARIN Address Blocks 24/8, 63/8, 64/6, 68/8, 199/8, 200/8, 204/6, 208/7 and 216/8 RIPE Region Analysis Summary ---------------------------- Prefixes being announced by RIPE Region ASes: 19496 Total RIPE prefixes after maximum aggregation: 14604 Prefixes being announced from the RIPE address blocks: 16178 Unique aggregates announced from the RIPE address blocks: 10532 RIPE Region origin ASes present in the Internet Routing Table: 3916 RIPE Region origin ASes announcing only one prefix: 2112 RIPE Region transit ASes present in the Internet Routing Table: 740 Average RIPE Region AS path length visible: 5.9 Max RIPE Region AS path length visible: 23 Number of RIPE addresses announced to Internet: 112763936 Equivalent to 6 /8s, 184 /16s and 164 /24s Percentage of available RIPE address space announced: 74.7 RIPE AS Blocks 1877 - 1901, 2043, 2047, 2107 - 2136, 2585 - 2614 2773 - 2822, 2830 - 2879, 3154 - 3353, 5377 - 5631 6656 - 6911, 8192 - 9215, 12288 - 13311, 15360 - 16383 20480 - 21503, 24576 - 25599 RIPE Address Blocks 62/8, 80/7, 193/8, 194/7, 212/7 and 217/8 APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1221 1252 1191 896 Telstra Pty Ltd 4538 562 1279 27 China Education and Research 703 414 376 326 UUNET 2907 364 1848 342 SINET Japan 2764 359 358 330 connect.com.au pty ltd 7474 320 296 213 Optus Communications Pty Ltd 17557 297 20 95 Pakistan Telecom 4134 293 2158 103 Data Communications Bureau 4755 291 112 77 Videsh Sanchar Nigam Ltd. Aut 4766 249 1506 156 Korea Internet Exchange for " 4814 220 79 14 China Telecom (Group) 9583 182 32 5 Satyam Infoway Ltd., 17676 172 2674 32 XTAGE CORPORATION 9443 170 45 68 Primus Telecommunications 7539 147 189 142 TANet2, sponsored by NSC, TAI 9768 144 385 74 Korea Telecom 7657 133 22 91 The Internet Group Limited 9800 125 191 18 CHINA UNICOM 4621 116 11 63 UNINET-TH 4713 115 1009 106 NTT Communications Corporatio RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 702 896 2423 755 UUNET - Commercial IP service 3301 396 923 346 TeliaNet Sweden 5515 320 783 180 Sonera Solution Autonomous Sy 3215 289 641 178 France Telecom Transpac 3352 275 531 31 Ibernet, Internet Access Netw 3320 269 1965 208 Deutsche Telekom AG 680 235 2150 232 DFN-IP service G-WiN 5400 209 85 97 BT Ignite European Backbone 1257 208 446 203 SWIPnet Swedish IP Network 719 183 306 128 LANLINK autonomous system 786 177 1873 177 The JANET IP Service 8708 143 23 139 Romania Data Systems S.A. 3303 141 548 140 Swisscom Ltd 2856 128 787 118 BTnet UK Regional network 12302 124 18 31 MobiFon S.A. 3269 113 690 68 TELECOM ITALIA 3246 112 317 107 Song Networks 5511 110 192 88 France Telecom 3233 105 10 9 RNC - Romanian Natioanal R&D 2874 102 85 39 Global One Services AB ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 701 1812 9242 1369 UUNET Technologies, Inc. 7018 1317 7402 941 AT&T 3908 1030 1656 490 Supernet, Inc. 1239 830 3249 650 Sprint 852 754 1175 451 Telus Advanced Communications 1 695 8050 445 GENUITY 4323 638 442 262 Time Warner Communications, I 7843 613 364 246 Adelphia Corp. 7132 588 663 135 Southwestern Bell Internet Se 209 542 2025 343 Qwest 7046 524 887 325 UUNET Technologies, Inc. 690 520 75 331 Merit Network 7066 486 203 254 Virginia Polytechnic Institut 7029 452 164 54 Alltel Information Services, 3549 448 821 316 Global Crossing 6197 378 599 48 BellSouth Network Solutions, 15290 376 297 192 AT&T Canada IES 2149 368 174 271 Performance Systems, Inc. 2914 363 2081 363 Verio, Inc. 6347 344 370 75 SAVVIS Communications Corpora Global Per AS Maximum Aggr summary ---------------------------------- ASN No of nets Net Savings Description 3908 1030 540 Supernet, Inc. 4538 562 535 China Education and Research 7132 588 453 Southwestern Bell Internet Se 7029 452 398 Alltel Information Services, 7018 1317 376 AT&T 4323 638 376 Time Warner Communications, I 7843 613 367 Adelphia Corp. 1221 1252 356 Telstra Pty Ltd 6197 378 330 BellSouth Network Solutions, 852 754 303 Telus Advanced Communications 1657 279 277 University of Louisville 4151 289 273 USDA 6347 344 269 SAVVIS Communications Corpora 4355 326 256 EarthLink, Inc. 1 695 250 GENUITY 3352 275 244 Ibernet, Internet Access Netw 18566 237 233 Covad Communications 7066 486 232 Virginia Polytechnic Institut 4755 291 214 Videsh Sanchar Nigam Ltd. Aut 7303 271 211 Telecom Argentina Stet-France List of Unregistered ASNs (Global) ---------------------------------- Bad AS Designation Network Transit AS Description 5757 UNALLOCATED 207.19.224.0/24 701 UUNET Technologies, Advertised Unregistered Addresses --------------------------------- Network Origin AS Description 39.0.0.0/8 4554 Exchange Point Blocks 132.0.0.0/10 568 DISO-UNRRA 134.137.0.0/16 7170 AT&T Government Markets 135.0.0.0/13 10455 Lucent Technologies 137.0.0.0/13 568 DISO-UNRRA 138.94.0.0/16 1 GENUITY 158.0.0.0/13 568 DISO-UNRRA 164.233.0.0/16 6020 DISA NETWORK SERVICES 192.5.154.0/24 16588 Spider Web Hosting Solutions 192.44.0.0/19 702 UUNET - Commercial IP service 192.58.92.0/24 19548 Adelphia Business Solutions 192.72.0.0/18 4780 Digital United Inc. 192.72.0.0/16 4780 Digital United Inc. 192.83.16.0/20 5515 Sonera Solution Autonomous Sy 192.83.32.0/19 5515 Sonera Solution Autonomous Sy 192.83.96.0/22 5515 Sonera Solution Autonomous Sy 192.83.100.0/24 5515 Sonera Solution Autonomous Sy 192.91.198.0/24 2568 CTS Network Services 192.92.167.0/24 297 NASA Science Network 192.108.46.0/23 680 DFN-IP service G-WiN 192.119.135.0/24 270 NASA 192.135.50.0/24 7018 AT&T 192.136.79.0/24 719 LANLINK autonomous system 192.136.86.0/24 719 LANLINK autonomous system 192.136.87.0/24 719 LANLINK autonomous system 192.136.88.0/24 719 LANLINK autonomous system 192.139.62.0/24 6539 GT Group Telecom Services Cor 192.140.0.0/16 5511 France Telecom 192.153.136.0/21 568 DISO-UNRRA 192.156.0.0/19 568 DISO-UNRRA 192.156.164.0/24 19548 Adelphia Business Solutions 192.172.0.0/19 568 DISO-UNRRA 192.195.253.0/24 237 Merit Network 192.208.29.0/24 3908 Supernet, Inc. 192.208.30.0/23 3908 Supernet, Inc. 192.243.36.0/23 7168 Northwest Link Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:19 /9:7 /10:7 /11:12 /12:36 /13:86 /14:232 /15:415 /16:7285 /17:1472 /18:2665 /19:7710 /20:7498 /21:5282 /22:8005 /23:9672 /24:63338 /25:198 /26:177 /27:98 /28:88 /29:67 /30:113 /31:0 /32:72 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 3908 606 1030 Supernet, Inc. 702 540 896 UUNET - Commercial IP service 701 494 1812 UUNET Technologies, Inc. 690 466 520 Merit Network 7843 414 613 Adelphia Corp. 7066 389 486 Virginia Polytechnic Institut 7018 374 1317 AT&T 7029 357 452 Alltel Information Services, 1657 278 279 University of Louisville 6197 264 378 BellSouth Network Solutions, 6198 243 316 BellSouth Network Solutions, 3301 234 396 TeliaNet Sweden 18566 233 237 Covad Communications 3215 221 289 France Telecom Transpac 209 220 542 Qwest 1239 213 830 Sprint 1580 201 214 ANOSCEUR 3320 201 269 Deutsche Telekom AG 3352 201 275 Ibernet, Internet Access Netw 1 195 695 GENUITY Number of /24s announced per /8 block (Global) ---------------------------------------------- 4:3 12:525 13:10 15:2 17:6 20:3 24:699 25:1 32:41 38:9 40:6 44:1 57:13 61:326 62:236 63:1866 64:1227 65:1418 66:971 67:95 68:74 80:255 81:37 128:64 129:132 130:22 131:55 132:11 133:2 134:122 135:9 136:344 137:95 138:151 139:72 140:175 141:43 142:70 143:50 144:144 145:17 146:189 147:142 148:243 149:79 150:40 151:66 152:271 153:36 154:12 155:115 156:70 157:128 158:70 159:134 160:19 161:75 162:214 163:86 164:264 165:132 166:218 167:259 168:293 169:60 170:232 171:3 192:5467 193:2370 194:2114 195:909 196:414 198:3628 199:3155 200:2647 202:3308 203:4747 204:3256 205:2180 206:2652 207:2511 208:2611 209:2685 210:591 211:240 212:893 213:726 214:9 215:20 216:2847 217:475 218:31 End of report

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