Re: IPv4 BGP Table Reduction Analysis - Prefixes Filter by RIRs Minimum Allocations Boundaries
On Fri, Nov 30, 2007 at 11:24:58AM +0100, Elmar K. Bins wrote: Before anyone asks: I do get defaults from my transits ;) Measuring traffic following the defaults before and after implementation of the filters could be interesting... Best regards, Daniel -- CLUE-RIPE -- Jabber: [EMAIL PROTECTED] -- [EMAIL PROTECTED] -- PGP: 0xA85C8AA0
BGP Update Report
BGP Update Report Interval: 29-Oct-07 -to- 29-Nov-07 (32 days) Observation Point: BGP Peering with AS2.0 TOP 20 Unstable Origin AS Rank ASNUpds % Upds/PfxAS-Name 1 - AS8452 522820 6.7%1681.1 -- TEDATA TEDATA 2 - AS8866 192791 2.5% 674.1 -- BTC-AS Bulgarian Telecommunication Company Plc. 3 - AS16637 180928 2.3%2548.3 -- MTNNS-AS 4 - AS33783 100623 1.3% 768.1 -- EEPAD 5 - AS288 95579 1.2% 789.9 -- European Space Agency 6 - AS558385635 1.1%1338.0 -- GIPNL Equant Benelux AS 7 - AS321566452 0.8% 101.8 -- AS3215 France Telecom - Orange 8 - AS462153254 0.7% 352.7 -- UNSPECIFIED UNINET-TH 9 - AS17540 52630 0.7% 52630.0 -- MTL-AP Modern Terminals Limited 10 - AS949852212 0.7% 48.8 -- BBIL-AP BHARTI BT INTERNET LTD. 11 - AS14390 51213 0.7% 800.2 -- CORENET - Coretel America, Inc. 12 - AS24731 43527 0.6% 946.2 -- ASN-NESMA National Engineering Services and Marketing Company Ltd. (NESMA) 13 - AS912142424 0.5% 197.3 -- TTNET TTnet Autonomous System 14 - AS702 42313 0.5% 42.1 -- AS702 Verizon Business EMEA - Commercial IP service provider in Europe 15 - AS475542290 0.5% 28.0 -- VSNL-AS Videsh Sanchar Nigam Ltd. Autonomous System 16 - AS26407 41272 0.5%1528.6 -- CAROLINANET-AS - CAROLINANET a division of Guilford Communications Inc. 17 - AS26829 40629 0.5% 40629.0 -- YKK-USA - YKK USA,INC 18 - AS475039424 0.5% 176.0 -- CSLOXINFO-ISP-AS-AP CSLOXINFO Public Company Limited. 19 - AS815138395 0.5% 28.0 -- Uninet S.A. de C.V. 20 - AS983537867 0.5% 295.8 -- GITS-TH-AS-AP Government Information Technology Services TOP 20 Unstable Origin AS (Updates per announced prefix) Rank ASNUpds % Upds/PfxAS-Name 1 - AS17540 52630 0.7% 52630.0 -- MTL-AP Modern Terminals Limited 2 - AS26829 40629 0.5% 40629.0 -- YKK-USA - YKK USA,INC 3 - AS22072 26827 0.3% 26827.0 -- DEFINITYHEALTH - Definity Health 4 - AS19334 11555 0.1% 11555.0 -- SPORTLINE-DBC - SPORTLINE 5 - AS427047996 0.1%7996.0 -- ELITENETWORK-AS SC Elite Network Communications SRL 6 - AS334477662 0.1%7662.0 -- RPTCO-ASN-1 - RPT Consulting, Inc. 7 - AS326506138 0.1%6138.0 -- SANDHILLS-SW - SANDHILLS PUBLISHING 8 - AS617411832 0.1%5916.0 -- SPRINTLINK8 - Sprint 9 - AS139568696 0.1%4348.0 -- 10 - AS333568146 0.1%4073.0 -- EAGLE-TECH - Eagle-Tech Systems 11 - AS382403667 0.1%3667.0 -- CALYONFINANCIAL-AS-JP Calyon Financial, Inc. 12 - AS309293239 0.0%3239.0 -- HUTCB Hidrotechnical Faculty - Technical University 13 - AS261142772 0.0%2772.0 -- ICCM-ASN - Indian Creek Capital Management, LLC 14 - AS382422700 0.0%2700.0 -- FORTIS-AU-AS Fortis Clearing Sydney 15 - AS16637 180928 2.3%2548.3 -- MTNNS-AS 16 - AS336187539 0.1%2513.0 -- SERVLET-AS - Servlet Inc. 17 - AS402569947 0.1%2486.8 -- ACS-HCMS-ASN - Affiliated Computer Services, Inc. 18 - AS319424818 0.1%2409.0 -- COBECV - COBE CV 19 - AS404742161 0.0%2161.0 -- ABML-2 - Advantage Business Media, LLC 20 - AS144538257 0.1%2064.2 -- NETSURF - NetSurf Inc. TOP 20 Unstable Prefixes Rank Prefix Upds % Origin AS -- AS Name 1 - 192.96.13.0/2483734 1.0% AS16637 -- MTNNS-AS 2 - 192.96.14.0/2483729 1.0% AS16637 -- MTNNS-AS 3 - 83.228.103.0/24 56518 0.7% AS8866 -- BTC-AS Bulgarian Telecommunication Company Plc. 4 - 203.83.127.0/24 52630 0.6% AS17540 -- MTL-AP Modern Terminals Limited 5 - 209.163.125.0/24 50143 0.6% AS14390 -- CORENET - Coretel America, Inc. 6 - 83.228.59.0/2447161 0.6% AS8866 -- BTC-AS Bulgarian Telecommunication Company Plc. 7 - 83.228.61.0/2446994 0.6% AS8866 -- BTC-AS Bulgarian Telecommunication Company Plc. 8 - 12.108.254.0/24 40629 0.5% AS26829 -- YKK-USA - YKK USA,INC 9 - 196.219.236.0/24 37162 0.4% AS8452 -- TEDATA TEDATA 10 - 196.219.249.0/24 37144 0.4% AS8452 -- TEDATA TEDATA 11 - 196.219.234.0/24 37143 0.4% AS8452 -- TEDATA TEDATA 12 - 196.219.235.0/24 37142 0.4% AS8452 -- TEDATA TEDATA 13 - 196.219.244.0/24 37140 0.4% AS8452 -- TEDATA TEDATA 14 - 196.219.248.0/24 37136 0.4% AS8452 -- TEDATA TEDATA 15 - 196.219.245.0/24 37133 0.4% AS8452 -- TEDATA TEDATA 16 - 196.219.247.0/24 37124 0.4% AS8452 -- TEDATA TEDATA 17 - 196.219.246.0/24 37122 0.4% AS8452 -- TEDATA TEDATA 18 - 125.23.208.0/20 37109 0.4% AS9498 -- BBIL-AP BHARTI BT INTERNET LTD. 19 - 213.158.189.0/24 36760 0.4%
The Cidr Report
This report has been generated at Fri Nov 30 21:13:53 2007 AEST.
The report analyses the BGP Routing Table of AS2.0 router
and generates a report on aggregation potential within the table.
Check http://www.cidr-report.org for a current version of this report.
Recent Table History
Date PrefixesCIDR Agg
23-11-07244403 159991
24-11-07244579 160074
25-11-07244566 160108
26-11-07244664 160318
27-11-07244821 160639
28-11-07244976 160929
29-11-07245153 161039
30-11-07245357 161269
AS Summary
26906 Number of ASes in routing system
11363 Number of ASes announcing only one prefix
1966 Largest number of prefixes announced by an AS
AS4538 : ERX-CERNET-BKB China Education and Research Network
Center
89098240 Largest address span announced by an AS (/32s)
AS721 : DISA-ASNBLK - DoD Network Information Center
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').
--- 30Nov07 ---
ASnumNetsNow NetsAggr NetGain % Gain Description
Table 245817 1611228469534.5% All ASes
AS4538 1966 733 123362.7% ERX-CERNET-BKB China Education
and Research Network Center
AS4755 1484 308 117679.2% VSNL-AS Videsh Sanchar Nigam
Ltd. Autonomous System
AS9498 1055 70 98593.4% BBIL-AP BHARTI BT INTERNET
LTD.
AS4323 1375 485 89064.7% TWTC - Time Warner Telecom,
Inc.
AS11492 1179 402 77765.9% CABLEONE - CABLE ONE
AS22773 823 72 75191.3% CCINET-2 - Cox Communications
Inc.
AS6478 1124 397 72764.7% ATT-INTERNET3 - ATT WorldNet
Services
AS8151 1159 443 71661.8% Uninet S.A. de C.V.
AS18566 1033 375 65863.7% COVAD - Covad Communications
Co.
AS9829 851 213 63875.0% BSNL-NIB National Internet
Backbone
AS17488 908 274 63469.8% HATHWAY-NET-AP Hathway IP Over
Cable Internet
AS19262 815 200 61575.5% VZGNI-TRANSIT - Verizon
Internet Services Inc.
AS15270 609 41 56893.3% AS-PAETEC-NET - PaeTec
Communications, Inc.
AS7018 1517 1023 49432.6% ATT-INTERNET4 - ATT WorldNet
Services
AS7545 700 216 48469.1% TPG-INTERNET-AP TPG Internet
Pty Ltd
AS4134 1105 626 47943.3% CHINANET-BACKBONE
No.31,Jin-rong Street
AS2386 1287 809 47837.1% INS-AS - ATT Data
Communications Services
AS18101 607 137 47077.4% RIL-IDC Reliance Infocom Ltd
Internet Data Centre,
AS4766 818 377 44153.9% KIXS-AS-KR Korea Telecom
AS7011 992 577 41541.8% FRONTIER-AND-CITIZENS -
Frontier Communications of
America, Inc.
AS9443 450 76 37483.1% INTERNETPRIMUS-AS-AP Primus
Telecommunications
AS19916 569 206 36363.8% ASTRUM-0001 - OLM LLC
AS4808 504 142 36271.8% CHINA169-BJ CNCGROUP IP
network China169 Beijing
Province Network
AS17676 503 144 35971.4% GIGAINFRA BB TECHNOLOGY Corp.
AS6197 1030 674 35634.6% BATI-ATL - BellSouth Network
Solutions, Inc
AS4668 518 168 35067.6% LGNET-AS-KR LG CNS
AS4812 530 192 33863.8% CHINANET-SH-AP China Telecom
(Group)
AS16814 427 95 33277.8% NSS S.A.
AS3602 415 90 32578.3% AS3602-RTI - Rogers Telecom
Inc.
AS4802
Re: IPv4 BGP Table Reduction Analysis - Prefixes Filter by RIRs Minimum Allocations Boundaries
Eduardo :) The best of my thanks for this really good work; including tests for prefix reachability is something I'd call essential. I have btw implemented your prefix list filter additions (with the exception of the RIPE lines; I want to see everything local), and my table is down to 167K prefixes (from 234K). Before anyone asks: I do get defaults from my transits ;) Yours, Elmar.
Re: Giga fiber Tap
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Netoptics work great. Check out their aggregation taps. Some 4-port fiber gig taps, including Netoptics ones, drop frames when aggregate utilization exceeds 1 Gbit/s. That can be 500 east + 501 west or 1001 west, or 251 in each of 4 ports or whatever. I'd heard about a kiddie porn case getting tossed because the defense successfully argued law enforcement's tap may have dropped frames. I didn't believe it until I measured this myself with a packet blaster. I used VSS taps in my tests. Brian Chee of the University of Hawaii tried this before me with a Netoptics tap, with similar results: Endicott-Popovsky, B.E., Chee, B. and Frincke, D. Role of Calibration as Part of Establishing Foundation for Expert Testimony, in Proceedings 3rd Annual IFIP WG 11.9 Conference January 29-31, 2007, Orlando, FL. dn -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.3 (Darwin) iD8DBQFHULwTyPxGVjntI4IRAjaZAJ0eoGVzaxXh+TIuyx8tmfOlupj+LACfcFmI jUq2/DFjHiyrJRekjTnxnic= =s8IF -END PGP SIGNATURE-
