This report has been generated at Tue Feb 17 23:47:26 2004 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 10-02-04 130872 91396 11-02-04 130759 91492 12-02-04 131091 91537 13-02-04 131225 91573 14-02-04 131314 91491 15-02-04 131233 91647 16-02-04 131350 91764 17-02-04 131484 91764 AS Summary 16556 Number of ASes in routing system 6630 Number of ASes announcing only one prefix 1381 Largest number of prefixes announced by an AS AS7018 : 73517312 Largest address span announced by an AS (/32s) AS568 : 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'). --- 17Feb04 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 131572 91764 39808 30.3% All ASes AS4323 686 203 483 70.4% AS6197 732 298 434 59.3% AS7018 1381 968 413 29.9% AS701 1344 952 392 29.2% AS7843 503 123 380 75.5% AS27364 382 33 349 91.4% AS6198 545 214 331 60.7% AS4134 652 329 323 49.5% AS22909 341 19 322 94.4% AS22773 343 34 309 90.1% AS9583 352 46 306 86.9% AS1239 946 662 284 30.0% AS4355 385 101 284 73.8% AS17676 294 41 253 86.1% AS1221 899 647 252 28.0% AS6347 330 83 247 74.8% AS25844 243 16 227 93.4% AS6478 266 40 226 85.0% AS6140 356 134 222 62.4% AS209 719 508 211 29.3% AS14654 214 3 211 98.6% AS11305 242 41 201 83.1% AS2386 420 230 190 45.2% AS5668 345 158 187 54.2% AS20115 611 425 186 30.4% AS4519 203 20 183 90.1% AS6327 207 29 178 86.0% AS9929 204 31 173 84.8% AS15270 210 39 171 81.4% AS4766 412 243 169 41.0% Total 14767 6670 8097 54.8% Top 30 total Possible Bogus Routes 24.138.80.0/20 AS11260 63.0.0.0/8 AS705 64.62.126.0/23 AS25700 66.114.0.0/19 AS16526 66.114.28.0/24 AS15083 66.114.29.0/24 AS15083 66.114.30.0/24 AS15083 66.114.31.0/24 AS15083 69.8.128.0/17 AS7260 132.0.0.0/10 AS568 137.0.0.0/13 AS568 138.136.0.0/13 AS568 158.0.0.0/13 AS568 192.43.230.0/24 AS4738 192.44.0.0/19 AS702 192.64.84.0/24 AS5515 192.83.16.0/20 AS5515 192.83.32.0/19 AS5515 192.83.64.0/19 AS5515 192.83.96.0/22 AS5515 192.83.100.0/24 AS5515 192.119.135.0/24 AS270 192.124.252.0/22 AS680 192.135.50.0/24 AS7018 192.136.71.0/24 AS719 192.136.79.0/24 AS719 192.153.144.0/21 AS568 192.172.0.0/19 AS568 192.188.208.0/20 AS568 192.243.32.0/23 AS2044 198.23.26.0/24 AS4390 198.97.72.0/21 AS568 198.97.80.0/20 AS568 198.97.88.0/24 AS89 198.97.192.0/20 AS568 198.97.240.0/20 AS568 198.101.4.0/22 AS568 198.136.32.0/20 AS19329 198.144.32.0/19 AS3998 198.161.87.0/24 AS6539 198.161.165.0/24 AS852 198.163.155.0/24 AS684 198.167.0.0/16 AS7456 198.167.163.0/24 AS15290 198.168.0.0/16 AS701 198.169.0.0/16 AS803 198.232.133.0/24 AS23075 199.10.0.0/16 AS568 199.60.0.0/20 AS271 199.84.0.0/16 AS701 199.114.0.0/18 AS568 199.114.0.0/21 AS568 199.114.128.0/18 AS568 199.114.130.0/24 AS721 199.114.132.0/24 AS721 199.114.136.0/24 AS1913 199.114.138.0/24 AS721 199.114.140.0/24 AS3544 199.114.142.0/24 AS721 199.114.144.0/24 AS721 199.114.148.0/24 AS721 199.114.150.0/24 AS721 199.114.152.0/24 AS1913 199.114.154.0/24 AS1733 199.114.156.0/24 AS1913 199.114.160.0/24 AS1733 199.120.32.0/19 AS16582 199.121.0.0/16 AS568 199.123.0.0/18 AS568 199.123.16.0/20 AS568 199.123.80.0/21 AS568 199.189.32.0/19 AS7332 199.202.0.0/16 AS701 202.47.1.0/24 AS7491 202.70.0.0/20 AS4658 202.70.240.0/20 AS4058 202.73.128.0/22 AS4058 202.86.128.0/24 AS4755 202.86.142.0/24 AS30362 202.86.171.0/24 AS4755 202.86.172.0/23 AS4755 202.86.190.0/24 AS4750 202.93.0.0/20 AS4134 202.122.76.0/24 AS17553 202.133.3.0/24 AS9335 202.143.56.0/21 AS4761 202.149.240.0/20 AS4761 202.149.240.0/21 AS4761 202.149.248.0/21 AS4761 202.155.243.0/24 AS4795 203.32.4.0/23 AS7617 203.62.0.0/17 AS7572 203.86.2.0/23 AS4058 203.132.107.0/24 AS10236 203.132.108.0/24 AS10236 203.132.111.0/24 AS10236 203.132.118.0/24 AS18065 203.132.122.0/24 AS4802 203.132.123.0/24 AS18065 203.132.124.0/24 AS18065 204.69.144.0/22 AS5668 204.154.125.0/24 AS3952 204.154.126.0/24 AS3952 204.154.127.0/24 AS3952 204.194.110.0/23 AS30653 205.150.0.0/15 AS701 206.41.32.0/19 AS14824 206.81.187.0/24 AS19194 206.108.34.0/24 AS852 206.108.35.0/24 AS852 206.167.57.0/24 AS376 206.191.64.0/18 AS15290 206.251.69.0/24 AS27429 207.162.192.0/19 AS4589 207.231.96.0/19 AS11194 208.81.187.0/24 AS19194 209.169.219.0/24 AS189 209.169.223.0/24 AS189 209.172.0.0/18 AS7770 209.213.32.0/19 AS10629 209.213.50.0/24 AS10629 209.213.51.0/24 AS10629 209.213.55.0/24 AS10629 209.213.56.0/24 AS10629 209.222.137.0/24 AS27429 209.240.96.0/19 AS10815 209.251.0.0/19 AS11036 209.251.64.0/19 AS10266 210.213.0.0/19 AS6453 216.18.224.0/21 AS11458 216.18.224.0/22 AS11458 216.18.228.0/22 AS11458 216.36.46.0/24 AS7176 216.36.47.0/24 AS7176 216.96.128.0/18 AS7018 Please see http://www.cidr-report.org for the full report