- routing-wg - mailman.ripe.net

GEANT implementing "BGP Guard Time" on their Junipers (was: Route update stats)
by Christian Panigl, ACOnet/VIX/UniVie 06 Mar '03

06 Mar '03

Dear all, remembering the thread on "Route update stats" in December ? Specifically: http://www.ripe.net/ripe/mail-archives/routing-wg/2002/msg00050.html Now Christophe Belmont, GEANT-NOC, together with Juniper found a solution and we successfully tested it: They implemented "BGP Guard Time" (Cisco like 30 seconds) and the result was impressive: The number of BGP update messages received from GEANT dropped by ~85% and the number of "flaps" seen from GEANT by ~75% ! BGP guard time (30sec) means that updates are only sent to neighbors for prefixes which have stayed in the routing table for 30 seconds. I'm sure you know the specific problem, that when a prefix is withdrawn in a meshed environment, lots of updates are sent from BGP entities which do think that they still have a (longer) path. It may take quite some time until all these false updates are dying down. Without this guard time a BGP speaker immediately forwards all those false updates to all peers. I guess that if you would globally disable BGP guard time (which fortunately is default ON=30seconds for Ciscos but apparently not for Junipers) quite some routers would collapse on these withdrawal aftermaths. So my suggestion would be for all ISPs using Juniper routers: turn on "BGP Guard Time" (Cisco like 30 seconds). Christophe, probably you can post the details to the list !? Kind regards CP --- ---------------------------------------------------------------------- --- --- Christian Panigl : Vienna University Computer Center - ACOnet --- --- VUCC - ACOnet - VIX : -------------------------------------------- --- --- Universitaetsstrasse 7 : Mail: Panigl(a)CC.UniVie.ac.at (CP8-RIPE) --- --- A-1010 Vienna / Austria : Tel: +43 1 4277-14032 (Fax: -9140) --- --- ---------------------------------------------------------------------- ---

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RE: GEANT implementing "BGP Guard Time" on their Junipers (was: R oute update stats)
by Guy Davies 04 Mar '03

04 Mar '03

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi All, If I'm understanding Christian correctly, he's referring to "out-delay <seconds>". This can be configured for all groups [edit protocols bgp], all neighbours in a group [edit protocols bgp group <foo>] or for an individual neighbour [edit protocols bgp group <foo> neighbour <bar>]. Regards, Guy > -----Original Message----- > From: Christian Panigl, ACOnet/VIX/UniVie > [mailto:panigl@cc.univie.ac.at] > Sent: Tuesday, March 04, 2003 4:46 PM > To: routing-wg(a)ripe.net > Cc: christophe.belmont(a)c-s.fr; panigl(a)cc.univie.ac.at > Subject: GEANT implementing "BGP Guard Time" on their Junipers (was: > Route update stats) > > > Dear all, > > remembering the thread on "Route update stats" in December ? > > Specifically: > > http://www.ripe.net/ripe/mail-archives/routing-wg/2002/msg00050.html > > Now Christophe Belmont, GEANT-NOC, together with Juniper found a > solution and we successfully tested it: > > They implemented "BGP Guard Time" (Cisco like 30 seconds) and the > result was impressive: > > The number of BGP update messages received from GEANT > dropped by ~85% > and the number of "flaps" seen from GEANT by ~75% ! > > BGP guard time (30sec) means that updates are only sent > to neighbors for > prefixes which have stayed in the routing table for 30 > seconds. I'm > sure you know the specific problem, that when a prefix is > withdrawn in a > meshed environment, lots of updates are sent from BGP > entities which do > think that they still have a (longer) path. It may take > quite some time > until all these false updates are dying down. Without > this guard time a > BGP speaker immediately forwards all those false updates > to all peers. > I guess that if you would globally disable BGP guard time (which > fortunately is default ON=30seconds for Ciscos but > apparently not for > Junipers) quite some routers would collapse on these withdrawal > aftermaths. > > So my suggestion would be for all ISPs using Juniper > routers: turn on > "BGP Guard Time" (Cisco like 30 seconds). > > Christophe, probably you can post the details to the list !? > > Kind regards > CP > > --- > -------------------------------------------------------------- > -------- --- > --- Christian Panigl : Vienna University Computer > Center - ACOnet --- > --- VUCC - ACOnet - VIX : > -------------------------------------------- --- > --- Universitaetsstrasse 7 : Mail: Panigl(a)CC.UniVie.ac.at > (CP8-RIPE) --- > --- A-1010 Vienna / Austria : Tel: +43 1 4277-14032 > (Fax: -9140) --- > --- > -------------------------------------------------------------- > -------- --- > -----BEGIN PGP SIGNATURE----- Version: PGP 8.0 iQA/AwUBPmThJ43dwu/Ss2PCEQLPNQCgjYgcomnM4xZ9MD/5Ia2IETGIApkAnivl Iood5hJCA7mbYip1JT8xQXVW =jyoz -----END PGP SIGNATURE----- This e-mail is private and may be confidential and is for the intended recipient only. If misdirected, please notify us by telephone and confirm that it has been deleted from your system and any copies destroyed. If you are not the intended recipient you are strictly prohibited from using, printing, copying, distributing or disseminating this e-mail or any information contained in it. We use reasonable endeavors to virus scan all e-mails leaving the Company but no warranty is given that this e-mail and any attachments are virus free. You should undertake your own virus checking. The right to monitor e-mail communications through our network is reserved by us.

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The Cidr Report
by cidr-report＠potaroo.net 28 Feb '03

28 Feb '03

This report has been generated at Fri Feb 28 21:46:34 2003 AEST. The report analyses the BGP Routing Table of an AS4637 (Reach) router and generates a report on aggregation potential within the table. Check http://www.cidr-report.org/as4637 for a current version of this report. Recent Table History Date Prefixes CIDR Agg 21-02-03 119400 85542 22-02-03 119615 85397 23-02-03 119379 85455 24-02-03 119479 85425 25-02-03 119470 85630 26-02-03 119690 85676 27-02-03 119740 85694 28-02-03 119708 85768 AS Summary 14678 Number of ASes in routing system 5782 Number of ASes announcing only one prefix 1604 Largest number of prefixes announced by an AS AS701 : ALTERNET-AS UUNET Technologies, Inc. 73080832 Largest address span announced by an AS (/32s) AS568 : SUMNET-AS DISO-UNRRA 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'). --- 28Feb03 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 119861 85734 34127 28.5% All ASes AS3908 1084 568 516 47.6% SUPERNETASBLK SuperNet, Inc. AS18566 491 8 483 98.4% COVAD Covad Communications AS701 1604 1151 453 28.2% ALTERNET-AS UUNET Technologies, Inc. AS4151 532 105 427 80.3% USDA-1 USDA AS4323 533 169 364 68.3% TW-COMM Time Warner Communications, Inc. AS7018 1385 1025 360 26.0% ATT-INTERNET4 AT&T WorldNet Services AS7843 556 224 332 59.7% ADELPHIA-AS Adelphia Corp. AS6197 485 157 328 67.6% BATI-ATL BellSouth Network Solutions, Inc AS7046 559 244 315 56.4% UUNET-CUSTOMER UUNET Technologies, Inc. AS1221 1121 816 305 27.2% ASN-TELSTRA Telstra Pty Ltd AS1239 969 686 283 29.2% SPRINTLINK Sprint AS4355 402 119 283 70.4% ERMS-EARTHLNK EARTHLINK, INC AS22927 295 14 281 95.3% AR-TEAR2-LACNIC TELEFONICA DE ARGENTINA AS705 450 196 254 56.4% ASN-ALTERNET UUNET Technologies, Inc. AS4814 264 15 249 94.3% CHINANET-BEIJING-AP China Telecom (Group) AS6198 439 205 234 53.3% BATI-MIA BellSouth Network Solutions, Inc AS1 662 435 227 34.3% GNTY-1 Genuity AS22291 243 31 212 87.2% CHARTER-LA Charter Communications AS17676 230 26 204 88.7% GIGAINFRA XTAGE CORPORATION AS6347 369 168 201 54.5% DIAMOND SAVVIS Communications Corporation AS2386 478 283 195 40.8% INS-AS AT&T Data Communications Services AS209 528 337 191 36.2% ASN-QWEST Qwest AS4134 304 113 191 62.8% CHINANET-BACKBONE No.31,Jin-rong Street AS690 498 308 190 38.2% MERIT-AS-27 Merit Network Inc. AS2048 258 87 171 66.3% LANET-1 State of Louisiana AS852 599 444 155 25.9% ASN852 Telus Advanced Communications AS7303 240 90 150 62.5% AR-TAST-LACNIC Telecom Argentina Stet-France Telecom S.A. AS22773 182 32 150 82.4% CCINET-2 Cox Communications Inc. Atlanta AS6140 285 136 149 52.3% IMPSAT-USA ImpSat AS6327 187 41 146 78.1% SHAWFIBER Shaw Fiberlink Limited Total 16232 8233 7999 49.3% Top 30 total Please see http://www.cidr-report.org for the full report ------------------------------------ Copies of this report are mailed to: nanog(a)merit.edu 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 Table Analysis 28 Feb '03

28 Feb '03

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 28 Feb, 2003 Analysis Summary ---------------- BGP routing table entries examined: 121927 Prefixes after maximum aggregation: 77477 Unique aggregates announced to Internet: 58082 Total ASes present in the Internet Routing Table: 14730 Origin-only ASes present in the Internet Routing Table: 12801 Origin ASes announcing only one prefix: 5774 Transit ASes present in the Internet Routing Table: 1929 Transit-only ASes present in the Internet Routing Table: 66 Average AS path length visible in the Internet Routing Table: 5.4 Max AS path length visible: 17 Illegal AS announcements present in the Routing Table: 11 Non-routable prefixes present in the Routing Table: 0 Prefixes being announced from the IANA Reserved Address blocks: 20 Number of addresses announced to Internet: 1200020621 Equivalent to 71 /8s, 134 /16s and 220 /24s Percentage of available address space announced: 32.4 Percentage of allocated address space announced: 58.3 Percentage of available address space allocated: 55.5 Total number of prefixes smaller than registry allocations: 57021 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 20463 Total APNIC prefixes after maximum aggregation: 12056 Prefixes being announced from the APNIC address blocks: 18982 Unique aggregates announced from the APNIC address blocks: 11657 APNIC Region origin ASes present in the Internet Routing Table: 1743 APNIC Region origin ASes announcing only one prefix: 522 APNIC Region transit ASes present in the Internet Routing Table: 287 Average APNIC Region AS path length visible: 5.3 Max APNIC Region AS path length visible: 14 Number of APNIC addresses announced to Internet: 106683880 Equivalent to 6 /8s, 91 /16s and 221 /24s Percentage of available APNIC address space announced: 56.6 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 220/6 ARIN Region Analysis Summary ---------------------------- Prefixes being announced by ARIN Region ASes: 75025 Total ARIN prefixes after maximum aggregation: 47680 Prefixes being announced from the ARIN address blocks: 53234 Unique aggregates announced from the ARIN address blocks: 16611 ARIN Region origin ASes present in the Internet Routing Table: 8196 ARIN Region origin ASes announcing only one prefix: 2768 ARIN Region transit ASes present in the Internet Routing Table: 782 Average ARIN Region AS path length visible: 5.2 Max ARIN Region AS path length visible: 17 Number of ARIN addresses announced to Internet: 187856256 Equivalent to 11 /8s, 50 /16s and 117 /24s Percentage of available ARIN address space announced: 70.0 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 - 26591, 26624 - 27647 ARIN Address Blocks 24/8, 63/8, 64/6, 68/7, 199/8, 204/6, 208/7 and 216/8 RIPE Region Analysis Summary ---------------------------- Prefixes being announced by RIPE Region ASes: 21126 Total RIPE prefixes after maximum aggregation: 15545 Prefixes being announced from the RIPE address blocks: 17658 Unique aggregates announced from the RIPE address blocks: 11063 RIPE Region origin ASes present in the Internet Routing Table: 4397 RIPE Region origin ASes announcing only one prefix: 2397 RIPE Region transit ASes present in the Internet Routing Table: 785 Average RIPE Region AS path length visible: 5.7 Max RIPE Region AS path length visible: 17 Number of RIPE addresses announced to Internet: 127445504 Equivalent to 7 /8s, 152 /16s and 170 /24s Percentage of available RIPE address space announced: 76.0 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, 28672 - 29695 RIPE Address Blocks 62/8, 80/7, 82/8, 188/8, 193/8, 194/7, 212/7 and 217/8 LACNIC Region Analysis Summary ------------------------------ Prefixes being announced by LACNIC Region ASes: 5303 Total LACNIC prefixes after maximum aggregation: 2196 Prefixes being announced from the LACNIC address blocks: 4671 Unique aggregates announced from the LACNIC address blocks: 3035 LACNIC Region origin ASes present in the Internet Routing Table: 330 LACNIC Region origin ASes announcing only one prefix: 87 LACNIC Region transit ASes present in the Internet Routing Table: 66 Average LACNIC Region AS path length visible: 5.8 Max LACNIC Region AS path length visible: 10 Number of LACNIC addresses announced to Internet: 12088064 Equivalent to 0 /8s, 184 /16s and 115 /24s Percentage of available LACNIC address space announced: 72.1 LACNIC AS Blocks 26592 - 26623, 27648 - 28671 LACNIC Address Blocks 200/8 APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1221 1113 1119 808 Telstra Pty Ltd 703 410 368 316 UUNET 2907 388 1960 367 SINET Japan 17557 346 25 138 Pakistan Telecom 2764 325 341 293 connect.com.au pty ltd 7474 306 276 208 Optus Communications Pty Ltd 4134 304 2637 96 Data Communications Bureau 4814 264 79 15 China Telecom (Group) 3786 241 773 207 DACOM Corporation 4755 235 134 75 Videsh Sanchar Nigam Ltd. Aut 17676 232 3574 24 XTAGE CORPORATION 9583 223 33 13 Satyam Infoway Ltd., 4766 208 2074 155 Korea Internet Exchange for " 9443 178 57 76 Primus Telecommunications 9800 166 205 41 CHINA UNICOM 4765 152 10 14 World Net & Services Co., Ltd 9238 136 8 17 TATA ISP 4716 128 735 122 TTnet 4739 128 57 116 Commerical Internet eXchange 9768 128 384 64 Korea Telecom ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 701 1613 8888 1149 UUNET Technologies, Inc. 7018 1387 7151 958 AT&T 3908 1244 1590 485 Supernet, Inc. 1239 979 3138 692 Sprint 1 669 8087 435 GENUITY 852 600 1107 444 Telus Advanced Communications 7046 559 826 243 UUNET Technologies, Inc. 7843 554 405 197 Adelphia Corp. 4323 534 473 168 Time Warner Communications, I 4151 531 691 58 USDA 209 529 2092 335 Qwest 690 498 73 308 Merit Network 3561 498 2327 339 Cable & Wireless USA 18566 491 114 7 Covad Communications 7066 490 204 254 Virginia Polytechnic Institut 6197 483 554 110 BellSouth Network Solutions, 2386 478 477 249 AT&T Data Communications Serv 376 460 375 111 Reseau Interordinateurs Scien 705 450 165 196 UUNET Technologies, Inc. 6198 437 195 201 BellSouth Network Solutions, RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 702 790 2250 653 UUNET - Commercial IP service 3215 315 818 173 France Telecom Transpac 3301 315 1142 303 TeliaNet Sweden 3320 263 1996 227 Deutsche Telekom AG 680 232 2054 229 DFN-IP service G-WiN 1257 219 370 196 SWIPnet Swedish IP Network 719 202 307 129 LANLINK autonomous system 5400 197 70 97 BT Ignite European Backbone 5515 186 779 160 Sonera Solution Autonomous Sy 786 179 1874 179 The JANET IP Service 8708 152 42 149 Romania Data Systems S.A. 20858 148 17 3 This AS will be used to conne 3303 144 517 143 Swisscom Ltd 8220 125 182 116 COLT Internet - International 12302 123 18 30 MobiFon S.A. 2856 118 1299 108 BTnet UK Regional network 3269 111 751 61 TELECOM ITALIA 3233 108 11 12 RNC - Romanian Natioanal R&D 3246 104 360 101 Song Networks 3352 99 652 29 Ibernet, Internet Access Netw LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 6140 285 98 104 ImpSat 7303 240 36 49 Telecom Argentina Stet-France 8151 213 325 115 UniNet S.A. de C.V. 11172 160 66 32 Servicios Alestra S.A de C.V 6503 157 207 109 AVANTEL, S.A. 16814 139 9 18 NSS, S.A. 13999 127 36 8 Mega Cable S.A. de C.V. 11340 110 3 38 Red Universitaria Nacional 10620 107 7 31 TVCABLE BOGOTA 6147 75 62 21 Telefonica Del Peru 1916 73 306 44 Fundacao de Amparo a Pesquisa 6535 72 5 23 Chilesat Servicios Empresari 8065 72 6 18 Empresas Publicas de Medellin 15311 71 27 36 Telefonica Empresas 11992 69 7 30 Integrated Systems 4270 67 18 10 Red de Interconexion Universi 7984 66 11 42 Global One Colombia 7080 64 4 1 Electronica y Comunicaciones 7927 64 5 39 Global One Venezuela 11830 62 5 20 Instituto Costarricense de El Global Per AS Maximum Aggr summary ---------------------------------- ASN No of nets Net Savings Description 3908 1244 759 Supernet, Inc. 18566 491 484 Covad Communications 4151 531 473 USDA 7018 1387 429 AT&T 6197 483 373 BellSouth Network Solutions, 4323 534 366 Time Warner Communications, I 7843 554 357 Adelphia Corp. 376 460 349 Reseau Interordinateurs Scien 7046 559 316 UUNET Technologies, Inc. 11492 309 308 Cable One 1221 1113 305 Telstra Pty Ltd 6347 370 292 SAVVIS Communications Corpora 4355 402 290 EarthLink, Inc. 1239 979 287 Sprint 22927 295 281 TELEFONICA DE ARGENTINA 705 450 254 UUNET Technologies, Inc. 4814 264 249 China Telecom (Group) 7066 490 236 Virginia Polytechnic Institut 6198 437 236 BellSouth Network Solutions, 1 669 234 GENUITY List of Unregistered ASNs (Global) ---------------------------------- Bad AS Designation Network Transit AS Description 1877 UNALLOCATED 192.108.199.0/24 1880 Stupi, house man's p 64521 PRIVATE 198.189.23.0/24 2151 California State Uni 64521 PRIVATE 198.189.24.0/24 2151 California State Uni 64524 PRIVATE 198.189.134.0/24 2151 California State Uni 64524 PRIVATE 198.189.135.0/24 2151 California State Uni 64524 PRIVATE 198.189.136.0/24 2151 California State Uni 64524 PRIVATE 198.189.137.0/24 2151 California State Uni 64524 PRIVATE 198.189.138.0/24 2151 California State Uni 64521 PRIVATE 198.189.158.0/24 2151 California State Uni 64521 PRIVATE 198.189.235.0/24 2151 California State Uni 64521 PRIVATE 198.189.236.0/24 2151 California State Uni Advertised Unregistered Addresses --------------------------------- Network Origin AS Description 39.0.0.0/8 4554 Exchange Point Blocks 132.0.0.0/10 568 DISO-UNRRA 135.0.0.0/13 10455 Lucent Technologies 137.0.0.0/13 568 DISO-UNRRA 158.0.0.0/13 568 DISO-UNRRA 192.44.0.0/19 702 UUNET - Commercial IP service 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 192.119.135.0/24 270 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 192.153.136.0/21 568 DISO-UNRRA 192.156.164.0/24 19548 Adelphia Business Solutions 192.172.0.0/19 568 DISO-UNRRA 192.243.36.0/23 2044 AUSNet, Inc. Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:18 /9:3 /10:8 /11:12 /12:46 /13:93 /14:238 /15:445 /16:7353 /17:1598 /18:2900 /19:8169 /20:8092 /21:5812 /22:8818 /23:10536 /24:66934 /25:170 /26:185 /27:113 /28:88 /29:63 /30:133 /31:4 /32:96 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 3908 815 1244 Supernet, Inc. 702 493 790 UUNET - Commercial IP service 7018 491 1387 AT&T 18566 486 491 Covad Communications 701 476 1613 UUNET Technologies, Inc. 690 447 498 Merit Network 7066 389 490 Virginia Polytechnic Institut 1239 365 979 Sprint 6197 356 483 BellSouth Network Solutions, 6198 347 437 BellSouth Network Solutions, 7843 320 554 Adelphia Corp. 11492 308 309 Cable One 22927 294 295 TELEFONICA DE ARGENTINA 2386 274 478 AT&T Data Communications Serv 6140 272 285 ImpSat 7046 263 559 UUNET Technologies, Inc. 20115 257 383 Charter Communications 3215 240 315 France Telecom Transpac 7303 239 240 Telecom Argentina Stet-France 4355 229 402 EarthLink, Inc. Number of /24s announced per /8 block (Global) ---------------------------------------------- 12:653 13:1 15:4 17:2 20:9 24:837 25:1 32:83 34:1 38:57 40:18 44:2 55:1 57:16 61:453 62:508 63:1904 64:1391 65:1904 66:1463 67:214 68:280 69:52 80:319 81:99 128:144 129:189 130:40 131:81 132:13 133:2 134:145 135:4 136:121 137:117 138:106 139:74 140:132 141:123 142:94 143:46 144:111 145:18 146:264 147:85 148:267 149:73 150:44 151:110 152:252 153:51 154:3 155:107 156:42 157:41 158:124 159:142 160:34 161:58 162:135 163:84 164:269 165:140 166:80 167:317 168:387 169:54 170:306 171:8 192:5288 193:2422 194:1998 195:946 196:469 198:3598 199:3209 200:2895 202:3600 203:5097 204:3049 205:2027 206:2407 207:2386 208:2691 209:2761 210:737 211:336 212:958 213:745 214:21 215:21 216:3220 217:598 218:80 219:14 220:52 End of report

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The Cidr Report
by cidr-report＠potaroo.net 21 Feb '03

21 Feb '03

This report has been generated at Fri Feb 21 21:46:27 2003 AEST. The report analyses the BGP Routing Table of an AS4637 (Reach) router and generates a report on aggregation potential within the table. Check http://www.cidr-report.org/as4637 for a current version of this report. Recent Table History Date Prefixes CIDR Agg 14-02-03 119071 85433 15-02-03 119072 85385 16-02-03 118946 85348 17-02-03 118884 85299 18-02-03 118939 85352 19-02-03 119053 85338 20-02-03 119156 85478 21-02-03 119400 85502 AS Summary 14614 Number of ASes in routing system 5749 Number of ASes announcing only one prefix 1577 Largest number of prefixes announced by an AS AS701 : ALTERNET-AS UUNET Technologies, Inc. 73048064 Largest address span announced by an AS (/32s) AS568 : SUMNET-AS DISO-UNRRA Possible Bogus Routes 10.0.0.0/8 AS4637 REACH Reach Network Border AS 192.168.0.0/16 AS4637 REACH Reach Network Border AS 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'). --- 21Feb03 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 119491 85471 34020 28.5% All ASes AS3908 1062 565 497 46.8% SUPERNETASBLK SuperNet, Inc. AS18566 482 6 476 98.8% COVAD Covad Communications AS701 1577 1145 432 27.4% ALTERNET-AS UUNET Technologies, Inc. AS4151 524 92 432 82.4% USDA-1 USDA AS7018 1427 1034 393 27.5% ATT-INTERNET4 AT&T WorldNet Services AS4323 529 170 359 67.9% TW-COMM Time Warner Communications, Inc. AS7843 569 234 335 58.9% ADELPHIA-AS Adelphia Corp. AS7046 578 246 332 57.4% UUNET-CUSTOMER UUNET Technologies, Inc. AS6197 478 158 320 66.9% BATI-ATL BellSouth Network Solutions, Inc AS1221 1119 821 298 26.6% ASN-TELSTRA Telstra Pty Ltd AS4355 402 120 282 70.1% ERMS-EARTHLNK EARTHLINK, INC AS22927 295 14 281 95.3% AR-TEAR2-LACNIC TELEFONICA DE ARGENTINA AS1239 960 680 280 29.2% SPRINTLINK Sprint AS705 447 194 253 56.6% ASN-ALTERNET UUNET Technologies, Inc. AS4814 261 15 246 94.3% CHINANET-BEIJING-AP China Telecom (Group) AS1 666 435 231 34.7% GNTY-1 Genuity AS6347 330 101 229 69.4% DIAMOND SAVVIS Communications Corporation AS6198 433 204 229 52.9% BATI-MIA BellSouth Network Solutions, Inc AS22291 243 32 211 86.8% CHARTER-LA Charter Communications AS17676 227 26 201 88.5% GIGAINFRA XTAGE CORPORATION AS690 498 308 190 38.2% MERIT-AS-27 Merit Network Inc. AS209 523 335 188 35.9% ASN-QWEST Qwest AS4134 304 117 187 61.5% CHINANET-BACKBONE No.31,Jin-rong Street AS2386 443 263 180 40.6% INS-AS AT&T Data Communications Services AS2048 260 87 173 66.5% LANET-1 State of Louisiana AS852 604 445 159 26.3% ASN852 Telus Advanced Communications AS7303 240 90 150 62.5% AR-TAST-LACNIC Telecom Argentina Stet-France Telecom S.A. AS17557 340 190 150 44.1% PKTELECOM-AS-AP Pakistan Telecom AS22773 181 31 150 82.9% CCINET-2 Cox Communications Inc. Atlanta AS6140 283 137 146 51.6% IMPSAT-USA ImpSat Total 16285 8295 7990 49.1% Top 30 total Please see http://www.cidr-report.org for the full report ------------------------------------ Copies of this report are mailed to: nanog(a)merit.edu 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 Table Analysis 21 Feb '03

21 Feb '03

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 21 Feb, 2003 Analysis Summary ---------------- BGP routing table entries examined: 121899 Prefixes after maximum aggregation: 77243 Unique aggregates announced to Internet: 57876 Total ASes present in the Internet Routing Table: 14677 Origin-only ASes present in the Internet Routing Table: 12744 Origin ASes announcing only one prefix: 5744 Transit ASes present in the Internet Routing Table: 1933 Transit-only ASes present in the Internet Routing Table: 68 Average AS path length visible in the Internet Routing Table: 5.4 Max AS path length visible: 17 Illegal AS announcements present in the Routing Table: 15 Non-routable prefixes present in the Routing Table: 0 Prefixes being announced from the IANA Reserved Address blocks: 22 Number of addresses announced to Internet: 1180750605 Equivalent to 70 /8s, 96 /16s and 211 /24s Percentage of available address space announced: 31.9 Percentage of allocated address space announced: 57.4 Percentage of available address space allocated: 55.5 Total number of prefixes smaller than registry allocations: 57147 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 20864 Total APNIC prefixes after maximum aggregation: 11953 Prefixes being announced from the APNIC address blocks: 19439 Unique aggregates announced from the APNIC address blocks: 11648 APNIC Region origin ASes present in the Internet Routing Table: 1733 APNIC Region origin ASes announcing only one prefix: 514 APNIC Region transit ASes present in the Internet Routing Table: 297 Average APNIC Region AS path length visible: 5.3 Max APNIC Region AS path length visible: 14 Number of APNIC addresses announced to Internet: 106346656 Equivalent to 6 /8s, 86 /16s and 184 /24s Percentage of available APNIC address space announced: 56.4 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 220/6 ARIN Region Analysis Summary ---------------------------- Prefixes being announced by ARIN Region ASes: 74699 Total ARIN prefixes after maximum aggregation: 47581 Prefixes being announced from the ARIN address blocks: 52941 Unique aggregates announced from the ARIN address blocks: 16499 ARIN Region origin ASes present in the Internet Routing Table: 8175 ARIN Region origin ASes announcing only one prefix: 2763 ARIN Region transit ASes present in the Internet Routing Table: 772 Average ARIN Region AS path length visible: 5.2 Max ARIN Region AS path length visible: 17 Number of ARIN addresses announced to Internet: 187330496 Equivalent to 11 /8s, 42 /16s and 111 /24s Percentage of available ARIN address space announced: 69.8 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 - 26591, 26624 - 27647 ARIN Address Blocks 24/8, 63/8, 64/6, 68/7, 199/8, 204/6, 208/7 and 216/8 RIPE Region Analysis Summary ---------------------------- Prefixes being announced by RIPE Region ASes: 21019 Total RIPE prefixes after maximum aggregation: 15497 Prefixes being announced from the RIPE address blocks: 17563 Unique aggregates announced from the RIPE address blocks: 11011 RIPE Region origin ASes present in the Internet Routing Table: 4376 RIPE Region origin ASes announcing only one prefix: 2383 RIPE Region transit ASes present in the Internet Routing Table: 781 Average RIPE Region AS path length visible: 5.7 Max RIPE Region AS path length visible: 17 Number of RIPE addresses announced to Internet: 126153344 Equivalent to 7 /8s, 132 /16s and 242 /24s Percentage of available RIPE address space announced: 75.2 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, 28672 - 29695 RIPE Address Blocks 62/8, 80/7, 82/8, 188/8, 193/8, 194/7, 212/7 and 217/8 LACNIC Region Analysis Summary ------------------------------ Prefixes being announced by LACNIC Region ASes: 5303 Total LACNIC prefixes after maximum aggregation: 2212 Prefixes being announced from the LACNIC address blocks: 4647 Unique aggregates announced from the LACNIC address blocks: 3028 LACNIC Region origin ASes present in the Internet Routing Table: 329 LACNIC Region origin ASes announcing only one prefix: 84 LACNIC Region transit ASes present in the Internet Routing Table: 68 Average LACNIC Region AS path length visible: 5.8 Max LACNIC Region AS path length visible: 10 Number of LACNIC addresses announced to Internet: 12042752 Equivalent to 0 /8s, 183 /16s and 194 /24s Percentage of available LACNIC address space announced: 71.8 LACNIC AS Blocks 26592 - 26623, 27648 - 28671 LACNIC Address Blocks 200/8 APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1221 1113 1135 815 Telstra Pty Ltd 4663 526 82 24 ELIMNET, INC 703 410 368 320 UUNET 2907 394 1994 372 SINET Japan 17557 340 24 128 Pakistan Telecom 2764 326 340 293 connect.com.au pty ltd 7474 305 276 208 Optus Communications Pty Ltd 4134 304 2651 100 Data Communications Bureau 4814 261 79 15 China Telecom (Group) 3786 241 773 207 DACOM Corporation 4755 232 133 74 Videsh Sanchar Nigam Ltd. Aut 17676 229 3526 24 XTAGE CORPORATION 9583 218 33 13 Satyam Infoway Ltd., 4766 202 2073 149 Korea Internet Exchange for " 9443 180 57 76 Primus Telecommunications 9800 166 205 41 CHINA UNICOM 4765 150 9 14 World Net & Services Co., Ltd 9238 132 8 19 TATA ISP 4716 129 737 123 TTnet 4739 128 57 116 Commerical Internet eXchange ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 701 1595 8889 1153 UUNET Technologies, Inc. 7018 1427 7151 965 AT&T 3908 1207 1587 473 Supernet, Inc. 1239 967 3118 682 Sprint 1 668 8084 432 GENUITY 852 605 1107 445 Telus Advanced Communications 7046 578 828 245 UUNET Technologies, Inc. 7843 570 402 209 Adelphia Corp. 4323 530 473 169 Time Warner Communications, I 209 525 2106 334 Qwest 4151 524 691 57 USDA 690 498 73 308 Merit Network 7066 493 204 254 Virginia Polytechnic Institut 18566 482 113 6 Covad Communications 6197 478 555 114 BellSouth Network Solutions, 3561 466 2322 326 Cable & Wireless USA 376 462 375 111 Reseau Interordinateurs Scien 705 448 165 195 UUNET Technologies, Inc. 2386 443 471 236 AT&T Data Communications Serv 6198 431 193 200 BellSouth Network Solutions, RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 702 790 2247 652 UUNET - Commercial IP service 3301 315 1143 303 TeliaNet Sweden 3215 312 818 171 France Telecom Transpac 3320 263 1996 227 Deutsche Telekom AG 680 232 2054 229 DFN-IP service G-WiN 1257 218 369 199 SWIPnet Swedish IP Network 719 201 306 128 LANLINK autonomous system 5515 187 779 161 Sonera Solution Autonomous Sy 786 179 1874 179 The JANET IP Service 5400 160 69 95 BT Ignite European Backbone 8708 149 42 147 Romania Data Systems S.A. 20858 147 17 3 This AS will be used to conne 3303 144 517 143 Swisscom Ltd 12302 124 18 31 MobiFon S.A. 8220 122 174 113 COLT Internet - International 2856 120 1299 110 BTnet UK Regional network 3269 111 751 61 TELECOM ITALIA 3233 108 11 12 RNC - Romanian Natioanal R&D 3246 105 358 102 Song Networks 3352 100 652 29 Ibernet, Internet Access Netw LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 6140 283 98 104 ImpSat 7303 240 36 49 Telecom Argentina Stet-France 8151 210 332 115 UniNet S.A. de C.V. 11172 161 82 33 Servicios Alestra S.A de C.V 6503 157 191 110 AVANTEL, S.A. 16814 139 9 18 NSS, S.A. 13999 127 36 8 Mega Cable S.A. de C.V. 11340 110 3 38 Red Universitaria Nacional 10620 107 7 31 TVCABLE BOGOTA 6147 74 62 21 Telefonica Del Peru 8065 74 6 19 Empresas Publicas de Medellin 1916 73 306 44 Fundacao de Amparo a Pesquisa 6535 72 5 23 Chilesat Servicios Empresari 15311 71 27 36 Telefonica Empresas 4270 69 18 10 Red de Interconexion Universi 11992 69 7 30 Integrated Systems 7927 65 5 40 Global One Venezuela 7080 64 4 1 Electronica y Comunicaciones 7984 61 11 40 Global One Colombia 11830 60 4 21 Instituto Costarricense de El Global Per AS Maximum Aggr summary ---------------------------------- ASN No of nets Net Savings Description 3908 1207 734 Supernet, Inc. 4663 526 502 ELIMNET, INC 18566 482 476 Covad Communications 4151 524 467 USDA 7018 1427 462 AT&T 6197 478 364 BellSouth Network Solutions, 7843 570 361 Adelphia Corp. 4323 530 361 Time Warner Communications, I 376 462 351 Reseau Interordinateurs Scien 7046 578 333 UUNET Technologies, Inc. 11492 308 307 Cable One 1221 1113 298 Telstra Pty Ltd 6347 370 291 SAVVIS Communications Corpora 4355 402 290 EarthLink, Inc. 1239 967 285 Sprint 22927 295 281 TELEFONICA DE ARGENTINA 705 448 253 UUNET Technologies, Inc. 4814 261 246 China Telecom (Group) 7066 493 239 Virginia Polytechnic Institut 1 668 236 GENUITY List of Unregistered ASNs (Global) ---------------------------------- Bad AS Designation Network Transit AS Description 64512 PRIVATE 66.205.199.0/24 25752 Neopolitan Networks 64520 PRIVATE 158.15.0.0/16 721 DLA Systems Automati 1877 UNALLOCATED 192.108.199.0/24 1880 Stupi, house man's p 64521 PRIVATE 198.189.23.0/24 2151 California State Uni 64521 PRIVATE 198.189.24.0/24 2151 California State Uni 64524 PRIVATE 198.189.134.0/24 2151 California State Uni 64524 PRIVATE 198.189.135.0/24 2151 California State Uni 64524 PRIVATE 198.189.136.0/24 2151 California State Uni 64524 PRIVATE 198.189.137.0/24 2151 California State Uni 64524 PRIVATE 198.189.138.0/24 2151 California State Uni 64521 PRIVATE 198.189.158.0/24 2151 California State Uni 64521 PRIVATE 198.189.235.0/24 2151 California State Uni 64521 PRIVATE 198.189.236.0/24 2151 California State Uni 65520 PRIVATE 202.36.16.0/21 9889 Web InterNet, ISP 65520 PRIVATE 202.36.24.0/22 9889 Web InterNet, ISP Advertised Unregistered Addresses --------------------------------- Network Origin AS Description 39.0.0.0/8 4554 Exchange Point Blocks 132.0.0.0/10 568 DISO-UNRRA 135.0.0.0/13 10455 Lucent Technologies 137.0.0.0/13 568 DISO-UNRRA 158.0.0.0/13 568 DISO-UNRRA 192.31.242.0/24 771 NASA Ames Research Center 192.44.0.0/19 702 UUNET - Commercial IP service 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 192.119.135.0/24 270 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 192.153.136.0/21 568 DISO-UNRRA 192.156.164.0/24 19548 Adelphia Business Solutions 192.172.0.0/19 568 DISO-UNRRA 192.243.36.0/23 2044 AUSNet, Inc. Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:17 /9:3 /10:8 /11:12 /12:44 /13:93 /14:238 /15:445 /16:7340 /17:1585 /18:2885 /19:8142 /20:8032 /21:5770 /22:8749 /23:10481 /24:66824 /25:286 /26:415 /27:101 /28:97 /29:61 /30:174 /31:2 /32:95 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 3908 779 1207 Supernet, Inc. 7018 525 1427 AT&T 702 494 790 UUNET - Commercial IP service 4663 482 526 ELIMNET, INC 18566 477 482 Covad Communications 701 453 1595 UUNET Technologies, Inc. 690 447 498 Merit Network 7066 392 493 Virginia Polytechnic Institut 1239 361 967 Sprint 6197 353 478 BellSouth Network Solutions, 7843 340 570 Adelphia Corp. 6198 339 431 BellSouth Network Solutions, 11492 307 308 Cable One 22927 294 295 TELEFONICA DE ARGENTINA 7046 280 578 UUNET Technologies, Inc. 6140 271 283 ImpSat 20115 271 396 Charter Communications 2386 240 443 AT&T Data Communications Serv 7303 239 240 Telecom Argentina Stet-France 3215 238 312 France Telecom Transpac Number of /24s announced per /8 block (Global) ---------------------------------------------- 12:644 13:1 15:4 17:2 20:9 24:834 25:1 32:83 34:1 38:42 40:18 44:2 55:1 57:15 61:452 62:505 63:1903 64:1384 65:1864 66:1419 67:213 68:288 69:51 80:324 81:88 128:146 129:187 130:40 131:81 132:13 133:2 134:144 135:4 136:193 137:117 138:104 139:72 140:102 141:110 142:94 143:46 144:107 145:18 146:262 147:85 148:267 149:74 150:44 151:95 152:252 153:51 154:3 155:106 156:41 157:39 158:123 159:141 160:34 161:55 162:135 163:83 164:269 165:138 166:81 167:305 168:393 169:54 170:304 171:8 192:5289 193:2427 194:2006 195:958 196:458 198:3593 199:3199 200:2879 202:3636 203:5094 204:3019 205:2030 206:2396 207:2390 208:2697 209:2791 210:781 211:373 212:952 213:723 214:21 215:21 216:3184 217:595 218:78 219:14 220:50 End of report

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New IPv6 block allocated to RIPE NCC
by leo vegoda 17 Feb '03

17 Feb '03

Dear Colleagues, The RIPE NCC received the IPv6 address range 2001:1400::/23 from the IANA in February 2003. You may wish to adjust any filters you have in place accordingly. More information on the IP space administered by the RIPE NCC can be found on our web site at: <http://www.ripe.net/ripe/docs/smallest-alloc-sizes.html> Kind regards, -- leo vegoda RIPE NCC Registration Services

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Announcement RIPE NCC RRC Training Course
by RIPE NCC Training 17 Feb '03

17 Feb '03

Dear Colleagues, [apologies for duplicate postings] As a new service to its members the RIPE NCC offers the "Routing Registry Training Course". The main objective of the "Routing Registry Training Course" is to familiarise the LIRs with the features of the Routing Registry, while introducing the relevant tools and services of the RIPE NCC. The course also offers practical exercises. OVERVIEW OF TOPICS COVERED IN THE COURSE: - Routing Registry as a part of the RIPE Whois Database and the Internet Routing Registry (IRR) - Specifying routing policies using (RPSL) Routing Policy Specification Language and the RtConfig tool - IRRToolSet - Routing Information Service (RIS) - Routing Registry Consistency Check Project Please note that this is an advanced course. It will: - NOT teach the basics of routing - NOT describe how to receive Internet resources from the RIPE NCC not describe to operate a Local Internet Registry (LIR) The target audience of the course are technical staff of LIRs: e.g. network operators, engineers etc. This course is not intended for administrative or management staff (e.g. Hostmasters) . It is assumed that all attendees will be familiar with Border Gateway Protocol routing and with the RIPE Database (i.e. creating/modifying objects). This course is based on interactive exercises in a local network set-up. Please bring your laptops equipped with the following: - A working Ethernet card, - Three meters of Ethernet cable, - A secure connection client, - A web browser. Please be prepared to share your laptop (or at least allow another attendee to "look over your shoulder") if necessary. The Routing Registry Training Course is conducted in the English language and is free of charge, since it is covered by the membership fee. More information about the Routing Registry Training Course can be found at: http://www.ripe.net/training/rr/ REGISTRATION: You can register for a Routing Registry Training Course at the following URL: http://www.ripe.net/cgi-bin/trainingform.pl.cgi Or by completing the registration form at the end of this e-mail and replying to <training(a)ripe.net> . In order to register for a Routing Registry Training Course you must be an employee of an LIR and either: - be an LIR contact - be confirmed by an LIR contact LIR contacts are those employees of an LIR who are registered with RIPE NCC as authoritative contact persons. It is expected that most of those interested in the Routing Registry Training Course will not be an authoritative contact person for their LIR, and therefore will be, refused by the course registration "robot". In order to be admitted to the course, a confirmation e-mail must be sent to <training(a)ripe.net>. Please approach the LIR contacts from your organisation personally, since the identity of LIR contacts is confidential, and the RIPE NCC is unable to divulge contact persons for any given LIR. Kind Regards, The RIPE NCC Training Team ----------------------------------------------------------------------- COURSE DATES AND VENUES ======================== Date: Monday 14 April 2003 Time: 0900 - 1700 Location: Amsterdam, The Netherlands AND: Date: Friday 20 June 2003 Time: 0900 - 1700 Location: Kiev, Ukraine ------------------------------------------------------------------------ REGISTRATION FORM ================= %START PART 1 - Registration 1) Your name Enter First name, Last name in full e.g. John Doe Mary-Beth Walton # NAME [ ] 2) Your Registry ID (format: country-code.<name of registry>) # REG [ ] 3) Your e-mail address # EMAIL [ ] 4) Your NIC handle (optional) # NICHANDLE [ ] 5) The course you plan to attend (date and location) # COURSE [ ] %END

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APNIC new block of addresses
by leo vegoda 14 Feb '03

14 Feb '03

FYI -- leo vegoda RIPE NCC Registration Services

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The Cidr Report
by cidr-report＠potaroo.net 14 Feb '03

14 Feb '03

This report has been generated at Fri Feb 14 00:46:03 2003 AEST. The report analyses the BGP Routing Table of an AS4637 (Reach) router and generates a report on aggregation potential within the table. Check http://www.cidr-report.org/as4637 for a current version of this report. Recent Table History Date Prefixes CIDR Agg 07-02-03 118526 85124 08-02-03 118568 85173 09-02-03 118579 85149 10-02-03 118627 85137 11-02-03 118637 85198 12-02-03 118760 85310 13-02-03 118989 85108 14-02-03 119071 85326 AS Summary 14555 Number of ASes in routing system 5721 Number of ASes announcing only one prefix 1571 Largest number of prefixes announced by an AS AS701 : ALTERNET-AS UUNET Technologies, Inc. 73048064 Largest address span announced by an AS (/32s) AS568 : SUMNET-AS DISO-UNRRA 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'). --- 14Feb03 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 119071 85433 33638 28.3% All ASes AS3908 1056 565 491 46.5% SUPERNETASBLK SuperNet, Inc. AS18566 474 7 467 98.5% COVAD Covad Communications AS4151 523 102 421 80.5% USDA-1 USDA AS701 1571 1161 410 26.1% ALTERNET-AS UUNET Technologies, Inc. AS7018 1425 1033 392 27.5% ATT-INTERNET4 AT&T WorldNet Services AS4323 528 169 359 68.0% TW-COMM Time Warner Communications, Inc. AS7843 569 240 329 57.8% ADELPHIA-AS Adelphia Corp. AS6197 476 157 319 67.0% BATI-ATL BellSouth Network Solutions, Inc AS1221 1130 824 306 27.1% ASN-TELSTRA Telstra Pty Ltd AS7046 566 274 292 51.6% UUNET-CUSTOMER UUNET Technologies, Inc. AS4355 405 119 286 70.6% ERMS-EARTHLNK EARTHLINK, INC AS1239 958 674 284 29.6% SPRINTLINK Sprint AS6347 368 85 283 76.9% DIAMOND SAVVIS Communications Corporation AS22927 295 14 281 95.3% AR-TEAR2-LACNIC TELEFONICA DE ARGENTINA AS705 446 196 250 56.1% ASN-ALTERNET UUNET Technologies, Inc. AS4814 261 15 246 94.3% CHINANET-BEIJING-AP China Telecom (Group) AS1 663 435 228 34.4% GNTY-1 Genuity AS6198 434 220 214 49.3% BATI-MIA BellSouth Network Solutions, Inc AS22291 242 32 210 86.8% CHARTER-LA Charter Communications AS17676 224 24 200 89.3% GIGAINFRA XTAGE CORPORATION AS690 498 308 190 38.2% MERIT-AS-27 Merit Network Inc. AS4134 306 119 187 61.1% ERX-CHINALINK Data Communications Bureau AS209 523 337 186 35.6% ASN-QWEST Qwest AS2386 439 259 180 41.0% INS-AS AT&T Data Communications Services AS2048 260 87 173 66.5% LANET-1 State of Louisiana AS852 606 446 160 26.4% ASN852 Telus Advanced Communications AS17557 339 188 151 44.5% PKTELECOM-AS-AP Pakistan Telecom AS22773 177 27 150 84.7% CCINET-2 Cox Communications Inc. Atlanta AS6140 285 136 149 52.3% IMPSAT-USA ImpSat AS6327 186 40 146 78.5% SHAWFIBER Shaw Fiberlink Limited Total 16233 8293 7940 48.9% Top 30 total Please see http://www.cidr-report.org for the full report ------------------------------------ Copies of this report are mailed to: nanog(a)merit.edu eof-list(a)ripe.net apops(a)lists.apnic.net routing-wg(a)ripe.net afnog(a)afnog.org

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