- routing-wg - mailman.ripe.net

Route Flap Damping: Harmful ?
by Christian Panigl, ACOnet/VIX/UniVie 18 Sep '02

18 Sep '02

Dear RIPE Routing-WG members, at the RIPE43 meeting in Rhodes last week Randy Bush was giving an interesting presentation on recent observations of counterproductive effects of current implementations of BGP Route Flap Damp(en)ing. The presentation is available in Acrobat Reader format at: http://www.ripe.net/ripe/meetings/archive/ripe-43/presentations/ripe43-rout… Brief summary: Basically because of "Cascaded Withdrawals" a single original flap of a prefix may cause the route flap penalty to exceed the suppress threshold at some points (routers) in the Internet. Main reasons for this behaviour are the characteristics of BGP (path vector), variations in BGP timers and delays, algorythm, implementation and parameters of current Route Flap Damping. This phenomenon is also (though less clearly) described in RIPE-229 (Flap Damping Parameter Recommendation), as it was in its predecessors since early 1998: http://www.ripe.net/ripe/docs/ripe-229.html#4.1 Only in late July this year I did again observe severe occurences of this phenomenon and was starting a conversation with Philip Smith (Cisco) and others. Now there is a SIGCOM 2002 Publication (August 2002) "Route Flap Damping Exacerbates Internet Routing Convergence" by Z.Mao and others: http://www.cs.berkeley.edu/~zmao/Papers/sig02.pdf I would like to thank the authors for the excellent research and, as one of the authors of RIPE-229 and its predecessors, I'm acknowledging that we haven't yet been able to analyse this specific problem in detail, but have communicated it to e.g. the MERIT/IPMA project team. I'm therefore more than grateful that Z.Mao and his co-authors did finally investigate it and would like to propose to the RIPE Routing-WG that we formally acknowledge their work, and specifically support their conclusion. Comments are of course welcome ! 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: Route Flap Damping: Harmful ?
by Christian Panigl, ACOnet/VIX/UniVie 18 Sep '02

18 Sep '02

>Date: Wed, 18 Sep 2002 10:46:25 +0100 >From: Tony Barber <acb(a)ukgateway.net> > >I agree with you that RIPE should acknowledge its support for this research. >I have a couple of observations to add before everyone agrees to go dropping >damping from their configurations: Thanks for your support Tony, of course, I was NOT suggesting to immediately obsolete RIPE-229 and to drop damping ;-) >1) Its hard to dispute that NO damping is better than the suppression of >constantly oscilating routes from my perspective, as a steady state *will* >always be reached. As Randy states, it may require less aggressive >parameters to achieve this. Remember when we started to draft the first version (RIPE-178), the goal was to get rid of exaggeratedly aggressive damping which was at that time applied by some major US carriers. I always was standing for a very "flat and gentle" damping approach but for the sake of getting the aggressive guys playing along we then compromised to "graded damping". >How important is it in this context to still have damping in place ? I'm inviting you to look at http://www.aco.net/lookingglass/lg.html [flap statistics] at that router (Cisco) we have configured flap damping according to RIPE-229 and we are receiving a full and undamped routing table through GEANT and GlobalCrossing (^20965_3549_). You can clearly see that something very weird is going on "somewhere". Looking at those flap statistics raises the question how much "less aggressive" the parameters should be :-( I don't think damping is still essential for the stability of todays core routers, but it obviously would be essential to improve the stability at some spots of the Internet and to improve convergence, either with a new version of BGP or a completely new inter-domain routing protocol. Kind regards CP

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The Cidr Report
by cidr-report＠potaroo.net 13 Sep '02

13 Sep '02

This report has been generated at Fri Sep 13 20:32:14 2002 AEST. The report analyses the BGP Routing Table of the Route-Views router and generates a report on aggregation potential within the table. Check http://bgp.potaroo.net/cidr for a current version of this report. Recent Table History Date Prefixes 06-09-02 121201 07-09-02 121195 08-09-02 121134 09-09-02 121168 10-09-02 121129 11-09-02 121290 12-09-02 121145 13-09-02 121338 Possible Bogus Routes 39.0.0.0/8 AS4554 EP0-BLK-ASNBLOCK-4 Exchange Point Blocks AS Summary 13879 Number of ASes in routing system 5303 Number of ASes announcing only one prefix 1798 Largest number of prefixes announced by an AS AS209 : ASN-QWEST Qwest 73089280 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 not proposed across non-advertised address space ('holes'). --- 13Sep02 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 121140 87526 33614 27.7% All ASes AS209 1798 1040 758 42.2% ASN-QWEST Qwest AS3908 1134 633 501 44.2% SUPERNETASBLK SuperNet, Inc. AS2548 1575 1125 450 28.6% ICIX-MD-AS Business Internet, Inc. AS7132 603 185 418 69.3% SBIS-AS Southwestern Bell Internet Services AS701 1761 1349 412 23.4% ALTERNET-AS UUNET Technologies, Inc. AS7018 1348 958 390 28.9% ATT-INTERNET4 AT&T WorldNet Services AS1221 1302 940 362 27.8% ASN-TELSTRA Telstra Pty Ltd AS4323 648 300 348 53.7% TW-COMM Time Warner Communications, Inc. AS7843 674 374 300 44.5% ADELPHIA-AS Adelphia Corp. AS6197 382 85 297 77.7% BATI-ATL BellSouth Network Solutions, Inc AS7046 612 316 296 48.4% UUNET-CUSTOMER UUNET Technologies, Inc. AS852 738 457 281 38.1% ASN852 Telus Advanced Communications AS18566 270 4 266 98.5% COVAD Covad Communications AS6347 396 139 257 64.9% DIAMOND SAVVIS Communications Corporation AS4151 283 32 251 88.7% USDA-1 USDA AS1 681 447 234 34.4% GNTY-1 Genuity AS4814 229 30 199 86.9% CHINANET-BEIJING-AP China Telecom (Group)Beijing Telecom CompanyBeijing China AS690 519 326 193 37.2% NSFNET-T3-RT-AS Merit Network Inc. AS4355 360 172 188 52.2% ERMS-EARTHLNK EARTHLINK, INC AS1239 844 657 187 22.2% SprintLink Sprint AS9942 248 71 177 71.4% COMINDICO-AP COMindico Australia AS2386 416 240 176 42.3% INS-AS AT&T Data Communications Services AS4134 302 133 169 56.0% ERX-CHINALINK Data Communications Bureau AS6595 246 78 168 68.3% DODDSEUR DoD Education Activity Network Assistance Center AS3356 389 222 167 42.9% LEVEL3 Level 3 Communications, LLC AS1791 186 23 163 87.6% SPRINTLINK3 Sprint Government Systems Division AS11371 169 7 162 95.9% UUNET-AS-11371 UUNET Technologies, Inc. AS1564 162 4 158 97.5% HQ, 5th Signal Command AS6327 171 16 155 90.6% SHAWFIBER Shaw Fiberlink Limited AS17676 220 65 155 70.5% GIGAINFRA APNIC ASN block Total 18666 10428 8238 44.1% Top 30 total Please see http://bgp.potaroo.net/cidr 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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Weekly Routing Table Report
by Routing Table Analysis 13 Sep '02

13 Sep '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 13 Sep, 2002 Analysis Summary ---------------- BGP routing table entries examined: 114537 Prefixes after maximum aggregation: 74233 Unique aggregates announced to Internet: 54821 Total ASes present in the Internet Routing Table: 13713 Origin-only ASes present in the Internet Routing Table: 11865 Origin ASes announcing only one prefix: 5321 Transit ASes present in the Internet Routing Table: 1848 Transit-only ASes present in the Internet Routing Table: 57 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: 5 Non-routable prefixes present in the Routing Table: 0 Prefixes being announced from the IANA Reserved Address blocks: 34 Number of addresses announced to Internet: 1208978732 Equivalent to 72 /8s, 15 /16s and 141 /24s Percentage of available address space announced: 32.6 Percentage of allocated address space announced: 59.8 Percentage of available address space allocated: 54.6 Total number of prefixes smaller than registry allocations: 46861 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 18747 Total APNIC prefixes after maximum aggregation: 11428 Prefixes being announced from the APNIC address blocks: 17224 Unique aggregates announced from the APNIC address blocks: 10901 APNIC Region origin ASes present in the Internet Routing Table: 1614 APNIC Region origin ASes announcing only one prefix: 526 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: 97048032 Equivalent to 5 /8s, 200 /16s and 213 /24s Percentage of available APNIC address space announced: 63.8 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: 71347 Total ARIN prefixes after maximum aggregation: 45844 Prefixes being announced from the ARIN address blocks: 50041 Unique aggregates announced from the ARIN address blocks: 15807 ARIN Region origin ASes present in the Internet Routing Table: 7715 ARIN Region origin ASes announcing only one prefix: 2536 ARIN Region transit ASes present in the Internet Routing Table: 738 Average ARIN Region AS path length visible: 5.2 Max ARIN Region AS path length visible: 23 Number of ARIN addresses announced to Internet: 180714176 Equivalent to 10 /8s, 197 /16s and 122 /24s Percentage of available ARIN address space announced: 67.3 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 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: 19538 Total RIPE prefixes after maximum aggregation: 14814 Prefixes being announced from the RIPE address blocks: 16151 Unique aggregates announced from the RIPE address blocks: 9963 RIPE Region origin ASes present in the Internet Routing Table: 4012 RIPE Region origin ASes announcing only one prefix: 2176 RIPE Region transit ASes present in the Internet Routing Table: 745 Average RIPE Region AS path length visible: 5.8 Max RIPE Region AS path length visible: 16 Number of RIPE addresses announced to Internet: 117499008 Equivalent to 7 /8s, 0 /16s and 228 /24s Percentage of available RIPE address space announced: 77.8 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 LACNIC Region Analysis Summary ------------------------------ Prefixes being announced by LACNIC Region ASes: 4902 Total LACNIC prefixes after maximum aggregation: 2147 Prefixes being announced from the LACNIC address blocks: 4209 Unique aggregates announced from the LACNIC address blocks: 2617 LACNIC Region origin ASes present in the Internet Routing Table: 316 LACNIC Region origin ASes announcing only one prefix: 83 LACNIC Region transit ASes present in the Internet Routing Table: 71 Average LACNIC Region AS path length visible: 6.0 Max LACNIC Region AS path length visible: 17 Number of LACNIC addresses announced to Internet: 11196416 Equivalent to 0 /8s, 170 /16s and 216 /24s Percentage of available LACNIC address space announced: 66.7 LACNIC AS Blocks 26592 - 26623 LACNIC Address Blocks 200/8 APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1221 1202 1188 884 Telstra Pty Ltd 703 393 367 306 UUNET 2907 360 1832 339 SINET Japan 2764 354 357 325 connect.com.au pty ltd 7474 315 276 211 Optus Communications Pty Ltd 4134 292 2268 96 Data Communications Bureau 17557 275 20 107 Pakistan Telecom 4755 260 142 73 Videsh Sanchar Nigam Ltd. Aut 4766 250 1824 158 Korea Internet Exchange for " 17676 220 3442 33 XTAGE CORPORATION 4814 215 79 15 China Telecom (Group) 9443 183 57 69 Primus Telecommunications 9583 173 32 5 Satyam Infoway Ltd., 9768 145 385 74 Korea Telecom 4515 139 102 80 Star Internet Services Ltd. 7657 130 22 90 The Internet Group Limited 9800 122 188 24 CHINA UNICOM 4739 117 56 108 Commerical Internet eXchange 4713 114 985 105 NTT Communications Corporatio 9498 103 8 22 BHARTI BT INTERNET LTD. ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 701 1762 9127 1350 UUNET Technologies, Inc. 7018 1312 7192 931 AT&T 3908 1058 1666 508 Supernet, Inc. 1239 840 3178 648 Sprint 852 732 1175 451 Telus Advanced Communications 7843 677 372 262 Adelphia Corp. 1 666 8066 439 GENUITY 7046 614 867 312 UUNET Technologies, Inc. 7132 603 664 143 Southwestern Bell Internet Se 4323 537 435 164 Time Warner Communications, I 690 519 75 326 Merit Network 209 518 2066 349 Qwest 7066 490 204 258 Virginia Polytechnic Institut 2548 443 1102 272 Business Internet, Inc. 3549 417 726 299 Global Crossing 6197 382 613 40 BellSouth Network Solutions, 15290 362 230 178 AT&T Canada IES 2914 360 2025 356 Verio, Inc. 4355 360 287 84 EarthLink, Inc. 6347 346 371 77 SAVVIS Communications Corpora RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 702 876 2430 734 UUNET - Commercial IP service 3301 388 907 344 TeliaNet Sweden 3215 293 657 180 France Telecom Transpac 3320 247 1964 213 Deutsche Telekom AG 680 238 2151 234 DFN-IP service G-WiN 5515 217 783 178 Sonera Solution Autonomous Sy 5400 214 85 101 BT Ignite European Backbone 1257 205 444 202 SWIPnet Swedish IP Network 719 191 306 130 LANLINK autonomous system 786 177 1873 177 The JANET IP Service 8708 146 41 141 Romania Data Systems S.A. 3303 143 546 142 Swisscom Ltd 2856 123 785 115 BTnet UK Regional network 12302 122 17 29 MobiFon S.A. 3246 120 372 113 Song Networks 5511 110 192 88 France Telecom 3233 108 10 9 RNC - Romanian Natioanal R&D 3269 104 658 63 TELECOM ITALIA 8220 104 167 98 COLT Internet - International 2874 103 85 40 Global One Services AB LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 8151 192 290 110 UniNet S.A. de C.V. 11340 180 7 70 Red Universitaria Nacional 7303 171 27 49 Telecom Argentina Stet-France 11172 166 72 33 Servicios Alestra S.A de C.V 6503 165 207 115 AVANTEL, S.A. 10834 147 92 36 ADVANCE TELECOMUNICACIONES S. 16814 107 7 13 NSS, S.A. 13999 103 19 8 Mega Cable S.A. de C.V. 10620 90 6 27 TVCABLE BOGOTA 1916 73 409 40 Fundacao de Amparo a Pesquisa 15034 73 6 29 TIBA SA 11992 71 7 29 Integrated Systems 2277 69 16 3 ECUANET - CORPORACION ECUATOR 7984 69 27 43 Global One Colombia 15311 69 25 32 Telefonica Empresas 4270 68 18 10 Red de Interconexion Universi 4926 64 4 52 Telintar S.A. 7993 59 9 30 Global One Chile 8065 59 6 16 Empresas Publicas de Medellin 16528 57 5 35 ImpSat S.A. Global Per AS Maximum Aggr summary ---------------------------------- ASN No of nets Net Savings Description 3908 1058 550 Supernet, Inc. 7132 603 460 Southwestern Bell Internet Se 7843 677 415 Adelphia Corp. 7018 1312 381 AT&T 4323 537 373 Time Warner Communications, I 6197 382 342 BellSouth Network Solutions, 1221 1202 318 Telstra Pty Ltd 7046 614 302 UUNET Technologies, Inc. 852 732 281 Telus Advanced Communications 4355 360 276 EarthLink, Inc. 6347 346 269 SAVVIS Communications Corpora 4151 283 268 USDA 18566 270 266 Covad Communications 376 342 233 Reseau Interordinateurs Scien 7066 490 232 Virginia Polytechnic Institut 1 666 227 GENUITY 4814 215 200 China Telecom (Group) 1580 212 200 ANOSCEUR 4134 292 196 Data Communications Bureau 11492 204 196 Cable One List of Unregistered ASNs (Global) ---------------------------------- Bad AS Designation Network Transit AS Description 65502 PRIVATE 194.59.34.0/23 12312 Tiscali Germany ASN 65502 PRIVATE 194.127.132.0/24 12312 Tiscali Germany ASN 65502 PRIVATE 194.127.133.0/24 12312 Tiscali Germany ASN 5757 UNALLOCATED 207.19.224.0/24 701 UUNET Technologies, 24997 UNALLOCATED 217.11.160.0/20 8342 Rostelecom Internet 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 192.44.0.0/19 702 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 192.119.135.0/24 270 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 192.136.136.0/24 7046 UUNET Technologies, Inc. 192.136.136.0/22 568 DISO-UNRRA 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 192.208.29.0/24 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 /8:20 /9:6 /10:7 /11:12 /12:36 /13:88 /14:236 /15:425 /16:7266 /17:1490 /18:2689 /19:7853 /20:7517 /21:5251 /22:8025 /23:9742 /24:62995 /25:204 /26:234 /27:141 /28:83 /29:50 /30:109 /31:1 /32:57 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 3908 627 1058 Supernet, Inc. 702 532 876 UUNET - Commercial IP service 701 494 1762 UUNET Technologies, Inc. 7843 480 677 Adelphia Corp. 690 465 519 Merit Network 7018 395 1312 AT&T 7066 388 490 Virginia Polytechnic Institut 7046 297 614 UUNET Technologies, Inc. 6197 266 382 BellSouth Network Solutions, 18566 266 270 Covad Communications 6198 243 315 BellSouth Network Solutions, 1239 237 840 Sprint 3301 230 388 TeliaNet Sweden 3215 225 293 France Telecom Transpac 4355 206 360 EarthLink, Inc. 11492 200 204 Cable One 1580 199 212 ANOSCEUR 209 191 518 Qwest 5400 188 214 BT Ignite European Backbone 3320 178 247 Deutsche Telekom AG Number of /24s announced per /8 block (Global) ---------------------------------------------- 4:1 12:548 13:10 15:2 17:7 20:4 24:849 25:1 32:41 38:7 40:6 44:1 55:1 57:14 61:333 62:243 63:1831 64:1240 65:1489 66:1130 67:101 68:93 80:276 81:52 128:65 129:155 130:21 131:55 132:11 133:2 134:130 135:9 136:574 137:94 138:152 139:69 140:158 141:72 142:67 143:50 144:141 145:17 146:260 147:141 148:248 149:77 150:41 151:57 152:310 153:37 154:11 155:104 156:70 157:110 158:65 159:137 160:49 161:75 162:128 163:87 164:261 165:122 166:105 167:267 168:121 169:61 170:170 171:3 192:5464 193:2347 194:2022 195:819 196:425 198:3579 199:3088 200:2626 202:3346 203:4808 204:3263 205:2112 206:2400 207:2448 208:2555 209:2547 210:626 211:244 212:879 213:720 214:8 215:19 216:2878 217:486 218:46 219:1 End of report

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The Cidr Report
by cidr-report＠potaroo.net 13 Sep '02

13 Sep '02

This is a test of the cidr report mailer. The report will normally be circulated each Friday at 1200 UTC ---- This report has been generated at Fri Sep 13 08:32:12 2002 AEST. The report analyses the BGP Routing Table of the Route-Views router and generates a report on aggregation potential within the table. Check http://bgp.potaroo.net/cidr for a current version of this report. Recent Table History Date Prefixes 06-09-02 121201 07-09-02 121195 08-09-02 121134 09-09-02 121168 10-09-02 121129 11-09-02 121290 12-09-02 121145 13-09-02 121301 Possible Bogus Routes 39.0.0.0/8 AS4554 EP0-BLK-ASNBLOCK-4 Exchange Point Blocks 192.168.4.0/24 AS6762 SEABONE-NET Telecom Italia international high speed, AS Summary 13882 Number of ASes in routing system 5306 Number of ASes announcing only one prefix 1799 Largest number of prefixes announced by an AS AS209 : ASN-QWEST Qwest 73089280 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 not proposed across non-advertised address space ('holes'). --- 13Sep02 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 121278 87543 33735 27.8% All ASes AS209 1799 1040 759 42.2% ASN-QWEST Qwest AS3908 1133 634 499 44.0% SUPERNETASBLK SuperNet, Inc. AS2548 1579 1128 451 28.6% ICIX-MD-AS Business Internet, Inc. AS7132 603 185 418 69.3% SBIS-AS Southwestern Bell Internet Services AS701 1765 1353 412 23.3% ALTERNET-AS UUNET Technologies, Inc. AS7018 1343 956 387 28.8% ATT-INTERNET4 AT&T WorldNet Services AS1221 1298 936 362 27.9% ASN-TELSTRA Telstra Pty Ltd AS4323 647 303 344 53.2% TW-COMM Time Warner Communications, Inc. AS7843 677 350 327 48.3% ADELPHIA-AS Adelphia Corp. AS7046 612 316 296 48.4% UUNET-CUSTOMER UUNET Technologies, Inc. AS6197 382 100 282 73.8% BATI-ATL BellSouth Network Solutions, Inc AS852 738 457 281 38.1% ASN852 Telus Advanced Communications AS18566 270 4 266 98.5% COVAD Covad Communications AS6347 396 136 260 65.7% DIAMOND SAVVIS Communications Corporation AS4151 283 32 251 88.7% USDA-1 USDA AS1 680 447 233 34.3% GNTY-1 Genuity AS4814 229 30 199 86.9% CHINANET-BEIJING-AP China Telecom (Group)Beijing Telecom CompanyBeijing China AS690 519 326 193 37.2% NSFNET-T3-RT-AS Merit Network Inc. AS4355 360 169 191 53.1% ERMS-EARTHLNK EARTHLINK, INC AS1239 844 657 187 22.2% SprintLink Sprint AS9942 248 71 177 71.4% COMINDICO-AP COMindico Australia AS2386 416 240 176 42.3% INS-AS AT&T Data Communications Services AS3356 393 220 173 44.0% LEVEL3 Level 3 Communications, LLC AS6595 246 75 171 69.5% DODDSEUR DoD Education Activity Network Assistance Center AS4134 302 135 167 55.3% ERX-CHINALINK Data Communications Bureau AS1791 186 23 163 87.6% SPRINTLINK3 Sprint Government Systems Division AS11371 169 7 162 95.9% UUNET-AS-11371 UUNET Technologies, Inc. AS1564 162 4 158 97.5% HQ, 5th Signal Command AS6327 171 16 155 90.6% SHAWFIBER Shaw Fiberlink Limited AS17676 219 64 155 70.8% GIGAINFRA APNIC ASN block Total 18669 10414 8255 44.2% Top 30 total Please see http://bgp.potaroo.net/cidr 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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Routing WG: 2nd draft agenda
by SchmitzJo＠aol.com 08 Sep '02

08 Sep '02

Dear colleagues, please find enclosed the 2nd draft of the agenda for the session of the Routing WG at RIPE43, Rhodes. The Routing WG session is held Tuesday, 10-Sep, 1.Slot: 14:00 - 15:30 2.Slot: 16:00 - 17:30 Again: the focus is on RIS, and we will also look at the newest RPSLng draft. I would like to thank Joao Damas for chairing this session for me, because I am not able to attend myself this time. As usual: comments, additions, corrections to the agenda of the Routing WG welcome! Btw: an updated version of last meetings minutes will be distributed shortly. ---- R I P E 4 3 R H O D E S Routing Working Group Agenda 1.Slot 14:00 - 15:30 A. Preliminaries (Joao Damas) (5min) - introduction - participants' list - volunteering of scribe - agenda bashing - RIPE 42 minutes - actions from earlier meetings B. Update from the RIPE NCC (Andrei Robachevsky) (5min) - Status of actions C. Route Flap Damping: Harmful? (Randy Bush) (15min) D. RIS Update (Matthew Williams) (20min) E. A RIS-based System for the Visualization of the Routing Flaps (Maurizio Patrignani) (20min) F. Observations on redundant BGP traffic and flaps from the RIPE RIS collectors (Alex Tudor) (20min) 2.Slot 16:00 - 17:30 G. RPSLng, the new draft (J.Damas) (20min) H. Discussion on RPSLng (open end) Y. Input from other WGs Z. AOB ---- Thanks Joachim --- JS395-RIPE -- standard disclaimer ---

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ANNOUNCEMENT: RIPE NCC's New Projects Proudly Presents New RIS Features
by Matthew Williams 06 Sep '02

06 Sep '02

[Apologies for duplicate emails] Dear All, RIPE NCC are pleased to announce the following RIS features: ============================================= * New Plots added to the RISreport The RISreport creates plots on a daily basis by using data from the RIS database. The new plots are generated per RRC and for the RIS as a whole: 1. AS number distribution -Origin-only ASes: ASes only seen to the right of AS paths -Transit ASes: ASes not seen exclusively to right of AS paths -Private: ASes designated for private use (64512 - 65534) -Other: ASes in ranges held or reserved by IANA or designated for experimental use 2. Average AS path length -Mean -Standard Deviation -Ratio (Mean/Standard Deviation) 3. Distribution of AS path length URL: http://www.ris.ripe.net/risreport/ (Click on "Totals" for each RRC or "All RRC boxes" at the bottom of the page) -------------------------------- * "RIS Martians" We provide now daily lists of Martians seen by RIS. We use the prefixes listed in Bill Manning's Internet Draft: "Documenting Special Use IPv4 Address Blocks that have been registered with IANA" (http://www.isi.edu/~bmanning/dsua.html) for our definition of Martians. URL: http://www.ris.ripe.net/martians/ -------------------------------- * "BGP Traffic Hot Spots" by the RIS These are daily lists of prefixes for which high BGP announcement or withdrawal activity has been observed by our Remote Route Collectors (RRC). We provide the lists per RRC and for the entire RIS. This is a list you don't want to be on ;) URL: http://www.ris.ripe.net/topten/ -------------------------------- * RIS Prefix Statistics Monthly lists of the number of prefixes seen by each RRC and the entire RIS. URL: http://www.ris.ripe.net/prefix-stat/ -------------------------------- * Addition to the RIS Help Pages: "BGP Cheat Sheet" Current Sections: -The Community Attribute -Brief Overview of BGP Routing Instability -Route Flap Damping/Dampening Please send your comments and suggestions to ris(a)ripe.net. More topics will be added later. URL: http://www.ripe.net/ris/bgpcheat.html ================================ For more information about the RIS: http://www.ripe.net/ris/ Best regards, The RIS team: James Aldridge, Daniel Karrenberg, Henk Uijterwaal, Arife Vural and Matthew Williams --- > Matthew Williams-Bywater (MW243-RIPE) > Customer Liaison Engineer > RIPE NCC (www.ripe.net)

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Weekly Routing Table Report
by Routing Table Analysis 06 Sep '02

06 Sep '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 06 Sep, 2002 Analysis Summary ---------------- BGP routing table entries examined: 114501 Prefixes after maximum aggregation: 74294 Unique aggregates announced to Internet: 54850 Total ASes present in the Internet Routing Table: 13650 Origin-only ASes present in the Internet Routing Table: 11815 Origin ASes announcing only one prefix: 5300 Transit ASes present in the Internet Routing Table: 1835 Transit-only ASes present in the Internet Routing Table: 56 Average AS path length visible in the Internet Routing Table: 5.4 Max AS path length visible: 18 Illegal AS announcements present in the Routing Table: 2 Non-routable prefixes present in the Routing Table: 0 Prefixes being announced from the IANA Reserved Address blocks: 34 Number of addresses announced to Internet: 1207827004 Equivalent to 71 /8s, 253 /16s and 250 /24s Percentage of available address space announced: 32.6 Percentage of allocated address space announced: 59.7 Percentage of available address space allocated: 54.6 Total number of prefixes smaller than registry allocations: 46777 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 18510 Total APNIC prefixes after maximum aggregation: 11375 Prefixes being announced from the APNIC address blocks: 17011 Unique aggregates announced from the APNIC address blocks: 10830 APNIC Region origin ASes present in the Internet Routing Table: 1601 APNIC Region origin ASes announcing only one prefix: 521 APNIC Region transit ASes present in the Internet Routing Table: 273 Average APNIC Region AS path length visible: 5.3 Max APNIC Region AS path length visible: 13 Number of APNIC addresses announced to Internet: 96131296 Equivalent to 5 /8s, 186 /16s and 216 /24s Percentage of available APNIC address space announced: 63.2 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: 71511 Total ARIN prefixes after maximum aggregation: 45997 Prefixes being announced from the ARIN address blocks: 50144 Unique aggregates announced from the ARIN address blocks: 15874 ARIN Region origin ASes present in the Internet Routing Table: 7692 ARIN Region origin ASes announcing only one prefix: 2537 ARIN Region transit ASes present in the Internet Routing Table: 731 Average ARIN Region AS path length visible: 5.2 Max ARIN Region AS path length visible: 18 Number of ARIN addresses announced to Internet: 180457168 Equivalent to 10 /8s, 193 /16s and 142 /24s Percentage of available ARIN address space announced: 67.2 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 - 26591 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: 19595 Total RIPE prefixes after maximum aggregation: 14791 Prefixes being announced from the RIPE address blocks: 16186 Unique aggregates announced from the RIPE address blocks: 9942 RIPE Region origin ASes present in the Internet Routing Table: 3987 RIPE Region origin ASes announcing only one prefix: 2160 RIPE Region transit ASes present in the Internet Routing Table: 742 Average RIPE Region AS path length visible: 5.8 Max RIPE Region AS path length visible: 16 Number of RIPE addresses announced to Internet: 117451392 Equivalent to 7 /8s, 0 /16s and 42 /24s Percentage of available RIPE address space announced: 77.8 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 LACNIC Region Analysis Summary ------------------------------ Prefixes being announced by LACNIC Region ASes: 4884 Total LACNIC prefixes after maximum aggregation: 2131 Prefixes being announced from the LACNIC address blocks: 4200 Unique aggregates announced from the LACNIC address blocks: 2636 LACNIC Region origin ASes present in the Internet Routing Table: 315 LACNIC Region origin ASes announcing only one prefix: 82 LACNIC Region transit ASes present in the Internet Routing Table: 72 Average LACNIC Region AS path length visible: 6.1 Max LACNIC Region AS path length visible: 17 Number of LACNIC addresses announced to Internet: 11193600 Equivalent to 0 /8s, 170 /16s and 205 /24s Percentage of available LACNIC address space announced: 66.7 LACNIC AS Blocks 26592 - 26623 LACNIC Address Blocks 200/8 APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1221 1206 1188 885 Telstra Pty Ltd 703 393 368 306 UUNET 2907 359 1800 338 SINET Japan 2764 354 357 325 connect.com.au pty ltd 7474 316 292 212 Optus Communications Pty Ltd 4134 290 2220 95 Data Communications Bureau 17557 281 21 111 Pakistan Telecom 4766 253 1827 160 Korea Internet Exchange for " 4755 241 142 73 Videsh Sanchar Nigam Ltd. Aut 4814 214 79 14 China Telecom (Group) 17676 212 3314 34 XTAGE CORPORATION 9443 183 57 69 Primus Telecommunications 9583 175 32 5 Satyam Infoway Ltd., 9768 145 385 74 Korea Telecom 4515 139 102 80 Star Internet Services Ltd. 7657 129 22 89 The Internet Group Limited 9800 122 188 24 CHINA UNICOM 4739 117 56 108 Commerical Internet eXchange 4713 115 1001 106 NTT Communications Corporatio 9498 101 8 22 BHARTI BT INTERNET LTD. ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 701 1755 9109 1347 UUNET Technologies, Inc. 7018 1307 7204 930 AT&T 3908 1047 1665 502 Supernet, Inc. 1239 834 3225 647 Sprint 852 731 1175 452 Telus Advanced Communications 1 674 8057 438 GENUITY 7843 653 372 251 Adelphia Corp. 7046 603 865 310 UUNET Technologies, Inc. 7132 602 664 143 Southwestern Bell Internet Se 4323 555 435 171 Time Warner Communications, I 209 520 2066 349 Qwest 690 519 75 326 Merit Network 7066 498 204 258 Virginia Polytechnic Institut 2548 442 1113 271 Business Internet, Inc. 3549 418 726 300 Global Crossing 6197 381 613 39 BellSouth Network Solutions, 15290 363 230 179 AT&T Canada IES 4355 358 287 84 EarthLink, Inc. 2914 356 2024 356 Verio, Inc. 6347 345 371 77 SAVVIS Communications Corpora RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 702 886 2427 743 UUNET - Commercial IP service 3301 391 907 344 TeliaNet Sweden 5515 319 783 179 Sonera Solution Autonomous Sy 3215 291 641 179 France Telecom Transpac 3320 247 1964 213 Deutsche Telekom AG 680 238 2151 234 DFN-IP service G-WiN 5400 213 85 101 BT Ignite European Backbone 1257 205 444 202 SWIPnet Swedish IP Network 719 191 306 130 LANLINK autonomous system 786 177 1873 177 The JANET IP Service 8708 147 41 142 Romania Data Systems S.A. 3303 143 546 142 Swisscom Ltd 2856 126 786 116 BTnet UK Regional network 12302 122 17 29 MobiFon S.A. 3246 121 373 114 Song Networks 5511 110 192 88 France Telecom 3233 107 10 9 RNC - Romanian Natioanal R&D 3269 106 658 63 TELECOM ITALIA 8220 103 167 97 COLT Internet - International 2874 102 85 39 Global One Services AB LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 8151 194 306 110 UniNet S.A. de C.V. 11340 178 7 69 Red Universitaria Nacional 7303 171 27 49 Telecom Argentina Stet-France 6503 165 191 115 AVANTEL, S.A. 11172 164 72 33 Servicios Alestra S.A de C.V 10834 146 91 35 ADVANCE TELECOMUNICACIONES S. 16814 107 7 13 NSS, S.A. 13999 103 19 8 Mega Cable S.A. de C.V. 10620 85 5 25 TVCABLE BOGOTA 1916 74 425 41 Fundacao de Amparo a Pesquisa 4270 73 18 10 Red de Interconexion Universi 15034 72 6 29 TIBA SA 11992 71 23 29 Integrated Systems 2277 69 16 3 ECUANET - CORPORACION ECUATOR 7984 69 27 43 Global One Colombia 15311 69 25 32 Telefonica Empresas 6535 67 4 14 Chilesat Servicios Empresari 4926 65 4 53 Telintar S.A. 7993 59 9 30 Global One Chile 16528 59 5 32 ImpSat S.A. Global Per AS Maximum Aggr summary ---------------------------------- ASN No of nets Net Savings Description 3908 1047 545 Supernet, Inc. 7132 602 459 Southwestern Bell Internet Se 7843 653 402 Adelphia Corp. 4323 555 384 Time Warner Communications, I 7018 1307 377 AT&T 6197 381 342 BellSouth Network Solutions, 1221 1206 321 Telstra Pty Ltd 7046 603 293 UUNET Technologies, Inc. 4151 303 288 USDA 852 731 279 Telus Advanced Communications 4355 358 274 EarthLink, Inc. 6347 345 268 SAVVIS Communications Corpora 18566 266 262 Covad Communications 7066 498 240 Virginia Polytechnic Institut 1 674 236 GENUITY 376 341 230 Reseau Interordinateurs Scien 4814 214 200 China Telecom (Group) 1580 210 199 ANOSCEUR 4134 290 195 Data Communications Bureau 690 519 193 Merit Network List of Unregistered ASNs (Global) ---------------------------------- Bad AS Designation Network Transit AS Description 65004 PRIVATE 192.231.93.0/24 5786 University of Puerto 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 192.44.0.0/19 702 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 192.119.135.0/24 270 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 192.136.136.0/24 7046 UUNET Technologies, Inc. 192.136.136.0/22 568 DISO-UNRRA 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 192.208.29.0/24 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 /8:20 /9:8 /10:7 /11:12 /12:37 /13:88 /14:235 /15:423 /16:7251 /17:1484 /18:2680 /19:7816 /20:7478 /21:5213 /22:8023 /23:9743 /24:63123 /25:202 /26:231 /27:135 /28:81 /29:45 /30:103 /31:1 /32:62 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 3908 617 1047 Supernet, Inc. 702 540 886 UUNET - Commercial IP service 701 493 1755 UUNET Technologies, Inc. 690 465 519 Merit Network 7843 452 653 Adelphia Corp. 7018 388 1307 AT&T 7066 388 498 Virginia Polytechnic Institut 7046 288 603 UUNET Technologies, Inc. 6197 265 381 BellSouth Network Solutions, 18566 262 266 Covad Communications 6198 242 312 BellSouth Network Solutions, 1239 232 834 Sprint 3301 232 391 TeliaNet Sweden 3215 224 291 France Telecom Transpac 4355 206 358 EarthLink, Inc. 1580 198 210 ANOSCEUR 11492 194 198 Cable One 209 193 520 Qwest 5400 187 213 BT Ignite European Backbone 4323 185 555 Time Warner Communications, I Number of /24s announced per /8 block (Global) ---------------------------------------------- 4:1 12:549 13:10 15:2 17:7 20:4 24:802 25:1 32:41 38:7 40:6 44:1 55:1 57:14 61:324 62:244 63:1831 64:1225 65:1476 66:1106 67:99 68:91 80:270 81:54 128:67 129:159 130:21 131:55 132:11 133:2 134:124 135:9 136:578 137:95 138:148 139:69 140:160 141:71 142:70 143:50 144:139 145:17 146:256 147:142 148:248 149:77 150:41 151:59 152:265 153:36 154:11 155:107 156:70 157:112 158:65 159:140 160:45 161:73 162:124 163:89 164:255 165:124 166:104 167:267 168:120 169:61 170:182 171:3 192:5476 193:2375 194:2068 195:821 196:418 198:3684 199:3107 200:2623 202:3289 203:4754 204:3275 205:2126 206:2498 207:2471 208:2567 209:2608 210:622 211:242 212:887 213:705 214:8 215:19 216:2872 217:480 218:40 219:1 End of report

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Routing WG RIPE43: 1st draft agenda
by SchmitzJo＠aol.com 04 Sep '02

04 Sep '02

Dear colleagues, please find enclosed the 1st draft of the agenda for the session of the Routing WG at RIPE43, Rhodes. The Routing WG session is held Tuesday, 10-Sep, 1.Slot: 14:00 - 15:30 2.Slot: 16:00 - 17:30 The focus this time is on the Routing Information System (RIS), but we will also be looking at the newest RPSLng draft. Depending on how swiftly we are moving through the presentations we may end up not using the 2nd slot - but this remains to be checked, also depending on the discussion. I would like to thank Joao Damas for chairing this session for me, because I am not able to attend myself this time. As usual: comments, additions, corrections to the agenda of the Routing WG welcome! Btw: an updated version of last meetings minutes will be distributed shortly. ---- R I P E 4 3 R H O D E S Routing Working Group Agenda 1.Slot 14:00 - 15:30 A. Preliminaries (J.Damas) (5min) - introduction - participants' list - volunteering of scribe - agenda bashing - RIPE 42 minutes - actions from earlier meetings B. Update from the RIPE NCC (A.Robachevsky) (5min) - Status of actions C. RIS Update (Matthew Williams) (20min) D. A RIS-based System for the Visualization of the Routing Flaps (Maurizio Patrignani) (20min) E. Observations on redundant BGP traffic and flaps from the RIPE RIS collectors (Alex Tudor) (20min) 2.Slot 16:00 - 17:30 F. RPSLng, the new draft (J.Damas) (20min) G. Discussion on RPSLng (open end) Y. Input from other WGs Z. AOB ---- Thanks Joachim --- JS395-RIPE -- standard disclaimer ---

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ANNOUNCEMENT: RIPE NCC New Projects' Activities during RIPE 43
by Matthew Williams 03 Sep '02

03 Sep '02

[Apologies for duplicate emails] Dear All, RIPE NCC New Projects are pleased to announce the following activities during RIPE 43: ----------------------------------------------------------------- * Demonstrations of Test Traffic Measurements (TTM) and Routing Information Service (RIS): RIS Demo Expert help available Thu: 10:30-11:00 Fri: 10:30-11:00 TTM Demo Expert help available Thu: 15:30-16:00 Fri: 10:30-11:00 Location: Please ask at the Information Desk. ---------------------------- * TALK: "A RIS-based System for the Visualization of the Routing Flaps" to be held on Tuesday, the 10th of September, 2002, during the Routing Working Group session. FlapViewer is a service that allows one to visually detect and analyze BGP routing instabilities, usually referred to as "flaps". The system will retrieve BGP routing announcements from the RIS and then produce graphics of involved autonomous systems and their peering relationships with the routing changes being shown as animations. Speaker: Maurizio Patrignani (University of Roma III) URL: http://www.dia.uniroma3.it/~lombardo/flapviewer/ ---------------------------- * TALK: "Observations on Redundant BGP Traffic and Flaps from the RIPE RIS Collectors" to be held on Tuesday, the 10th of September, 2002, during the Routing Working Group session. The objective of Agilent Labs' RIPE NCC data analysis project is to visualize and characterize Border Gateway Protocol (BGP4) behavior. The work is based on protocol traffic collected at exchange points around the world by RIPE NCC's RIS. The project has two tracks: daily analysis and long-term pattern discovery. Speaker: Alexander Tudor (Agilent Labs) URL: http://www.ris.ripe.net/agilent-labs/ ---------------------------- For more information about New Projects and our services: http://www.ripe.net/ripencc/pub-services/np/ Best regards, RIPE NCC New Projects --- > Matthew Williams-Bywater (MW243-RIPE) > Customer Liaison Engineer > RIPE NCC (www.ripe.net)

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