The BGP Instability Report

The BGP Instability Report is updated daily. This report
was generated on 05 July 2008 02:11 (UTC+1000)

50 Most active ASes for the past 31 days

RANK	ASN	UPDs	%	Prefixes	UPDs/Prefix	AS NAME
1	4766	285521	3.52%	1309	218.12	KIXS-AS-KR Korea Telecom
2	4538	231450	2.85%	4977	46.50	ERX-CERNET-BKB China Education and Research Network Center
3	8866	85110	1.05%	320	265.97	BTC-AS Bulgarian Telecommunication Company Plc.
4	9583	84478	1.04%	1223	69.07	SIFY-AS-IN Sify Limited
5	5691	73092	0.90%	13	5622.46	MITRE-AS-5 - The MITRE Corporation
6	17974	64105	0.79%	733	87.46	TELKOMNET-AS2-AP PT Telekomunikasi Indonesia
7	6140	56417	0.70%	476	118.52	IMPSAT-USA - ImpSat USA, Inc.
8	17488	49732	0.61%	1263	39.38	HATHWAY-NET-AP Hathway IP Over Cable Internet
9	13620	40124	0.49%	5	8024.80	ASN-ELAN - Elan Communications, Inc.
10	25994	36995	0.46%	142	260.53	NPG-001 - NPG Cable, INC
11	9498	36479	0.45%	1230	29.66	BBIL-AP BHARTI BT INTERNET LTD.
12	18231	35957	0.44%	240	149.82	EXATT-AS-AP IOL NETCOM LTD
13	577	33028	0.41%	453	72.91	BACOM - Bell Canada
14	8151	32556	0.40%	1301	25.02	Uninet S.A. de C.V.
15	6471	30654	0.38%	415	73.87	ENTEL CHILE S.A.
16	2386	30085	0.37%	1516	19.84	INS-AS - AT&T Data Communications Services
17	20115	29828	0.37%	1054	28.30	CHARTER-NET-HKY-NC - Charter Communications
18	5803	28921	0.36%	178	162.48	DDN-ASNBLK - DoD Network Information Center
19	209	27905	0.34%	3091	9.03	ASN-QWEST - Qwest
20	21565	27619	0.34%	183	150.92	HTCC - HTC Communications, LLC
21	702	26650	0.33%	549	48.54	AS702 Verizon Business EMEA - Commercial IP service provider in Europe
22	9800	26571	0.33%	349	76.13	UNICOM CHINA UNICOM
23	23966	26532	0.33%	338	78.50	LDN-AS-AP LINKdotNET Telecom Limited
24	6389	25516	0.31%	2724	9.37	BELLSOUTH-NET-BLK - BellSouth.net Inc.
25	42787	25382	0.31%	3	8460.67	MMIP-AS MultiMedia IP Ltd.
26	7018	24841	0.31%	1468	16.92	ATT-INTERNET4 - AT&T WorldNet Services
27	5056	24725	0.30%	70	353.21	INS-NET-2 - Iowa Network Services
28	15611	24713	0.30%	99	249.63	Iranian Research Organization for Science & Technology
29	3816	22258	0.27%	202	110.19	COLOMBIA TELECOMUNICACIONES S.A. ESP
30	4323	21687	0.27%	1509	14.37	TWTC - tw telecom holdings, inc.
31	11139	21663	0.27%	412	52.58	CWRIN CW BARBADOS
32	17964	21612	0.27%	213	101.46	DXTNET Beijing Dian-Xin-Tong Network Technologies Co., Ltd.
33	38069	21607	0.27%	9	2400.78	WARIDTEL-BD-AS-AP Warid Telecom
34	7011	21344	0.26%	1120	19.06	FRONTIER-AND-CITIZENS - Frontier Communications of America, Inc.
35	376	20904	0.26%	345	60.59	RISQ-AS - Reseau Interordinateurs Scientique Quebecois (RISQ)
36	7910	20392	0.25%	147	138.72	COLDECON
37	9394	20249	0.25%	1535	13.19	CRNET CHINA RAILWAY Internet(CRNET)
38	23552	20209	0.25%	39	518.18	KORNU-AS-KR Korea Nazarene University
39	6568	20179	0.25%	116	173.96	Ag para el Desarrollo de la Sociedad de la Inf en Bolivia - ADSIB
40	3464	19980	0.25%	375	53.28	ASC-NET - Alabama Supercomputer Network
41	9768	19939	0.25%	87	229.18	PUBNET1-AS KT
42	9829	19638	0.24%	767	25.60	BSNL-NIB National Internet Backbone
43	23082	19445	0.24%	5	3889.00	MPHI - Michigan Public Health Institute
44	9198	19252	0.24%	319	60.35	KAZTELECOM-AS Kazakhtelecom Corporate Sales Administration
45	6478	19011	0.23%	1030	18.46	ATT-INTERNET3 - AT&T WorldNet Services
46	1803	18945	0.23%	1233	15.36	ICMNET-5 - Sprint
47	2697	18529	0.23%	175	105.88	ERX-ERNET-AS Education and Research Network
48	23700	18500	0.23%	824	22.45	BM-AS-ID PT. Broadband Multimedia, Tbk
49	7738	18287	0.23%	281	65.08	Telecomunicacoes da Bahia S.A.
50	27699	17735	0.22%	58	305.78	TELECOMUNICACOES DE SAO PAULO S/A - TELESP
Total		1966351	24.25%

50 Most active ASes for the past 31 days

RANK	ASN	UPDs/Prefix	%	Prefixes	UPDs	AS NAME
1	42787	8460.7	0.31%	3	25382	MMIP-AS MultiMedia IP Ltd.
2	13620	8024.8	0.49%	5	40124	ASN-ELAN - Elan Communications, Inc.
3	29910	7146.0	0.09%	1	7146	IACP - INTL. ASSN OF CHIEF OF POLICEI
4	5691	5622.5	0.90%	13	73092	MITRE-AS-5 - The MITRE Corporation
5	38513	4386.0	0.05%	1	4386	LINTASARTA-AS-ID PT Aplikanusa Lintasarta
6	23082	3889.0	0.24%	5	19445	MPHI - Michigan Public Health Institute
7	25250	3699.0	0.14%	3	11097	GAMTEL-AS
8	9988	3690.0	0.09%	2	7380	MPT-AP Myanma Post and Telecommunication
9	40831	3687.5	0.09%	2	7375	ROBERTSDYBDAHL - Roberts & Dybdahl Inc.
10	40256	2627.0	0.13%	4	10508	ACS-HCMS-ASN - Affiliated Computer Services, Inc.
11	30287	2568.0	0.03%	1	2568	ALON-USA - ALON USA, LP
12	30929	2557.0	0.03%	1	2557	HUTCB Hidrotechnical Faculty - Technical University
13	38069	2400.8	0.27%	9	21607	WARIDTEL-BD-AS-AP Warid Telecom
14	32133	2377.0	0.03%	1	2377	JOHNSTONE-SUPPLY - Atwater Supply dba Johnstone Supply
15	27786	1967.0	0.02%	1	1967	SSA SISTEMAS S.A.
16	39105	1821.0	0.02%	1	1821	CLASS-AS SC Class Computers And Service SRL
17	31003	1773.1	0.15%	7	12412	IRON-MOUNTAIN-UK-AS Iron Mountain UK Ltd
18	9747	1668.0	0.16%	8	13344	EZINTERNET-AS-AP EZInternet Pty Ltd
19	35155	1654.0	0.02%	1	1654	VERBASOFT-AS Verbasoft ASN
20	25799	1647.0	0.02%	1	1647	HOLMAN - Holman Enterprises
21	31065	1477.0	0.13%	7	10339	MCIT
22	28361	1470.0	0.02%	1	1470
23	38180	1433.0	0.02%	1	1433	ETPI-IDS-JOLLIBEE-AS-AP 6/Fth floor JOLLIBEE PLAZA, Emerald Ave. Ortigas Center Pasig City.
24	23917	1312.0	0.02%	1	1312	BRIBIE-NET-AS-AP Bribie Island Net Multihomed, Brisbane
25	22266	1213.5	0.03%	2	2427	KNIGHT-INC - KNIGHT TRANSPORTATION
26	30355	1091.0	0.01%	1	1091	PATRIOT-COMMUNICATIONS - PATRIOT COMMUNICATIONS
27	18399	1071.0	0.01%	1	1071	BAGAN-TRANSIT-AS Bagan Cybertech IDC & Teleport International Transit
28	28646	997.0	0.01%	1	997	Confederacao Interestadual das Cooperativas Ligadas ao Sicredi
29	1475	970.5	0.02%	2	1941	ASNBLK1474-1477 - Headquarters, USAISC
30	38879	965.2	0.06%	5	4826	KHARISMANET-AP KHARISMA GLOBAL COMMUNICATION, PT
31	3944	869.0	0.04%	4	3476	PARTAN-LAB - Partan & Partan
32	47278	869.0	0.01%	1	869	MMTS9-AS Moscow Long-Distance Exchange No. 9 AS
33	26276	853.8	0.05%	5	4269	TIMKEN-USA - The Timken Company
34	42214	852.0	0.01%	1	852	IWC-AS SC International Work Company SRL
35	35627	848.0	0.04%	4	3392	PHYXIA Phyxia Networks
36	32945	847.0	0.03%	3	2541	TECONECTAMOS - Te Conectamos, LLC
37	20217	802.0	0.01%	1	802	PERCEPTA-GW1-AS - Percepta
38	34639	788.8	0.13%	13	10255	TOTEL-AS Totel LTD
39	5869	773.0	0.01%	1	773	DDN-ASNBLK - DoD Network Information Center
40	36970	759.0	0.01%	1	759	interswitch
41	30978	748.0	0.01%	1	748	ATKOS-AS Atkos Oy
42	40429	746.5	0.02%	2	1493	QISF - SETEL
43	43683	736.0	0.02%	2	1472	IHA-AS Internet Hosting Advertising AS Number
44	4184	721.0	0.02%	2	1442	STORTEK-WHQ - Storage Technology Corporation
45	18827	717.0	0.01%	1	717	VGMGR-FORBIN - Forbin
46	27245	710.0	0.02%	2	1420	HEIDRICK-CHICAGO - HEIDRICK
47	38148	704.2	0.10%	12	8451	QIANDRA-AS-ID QIANDRA INFORMATION TECHNOLOGY PT
48	25978	688.0	0.01%	1	688	RUSH-UNIVERSITY - Rush University Medical Center
49	47139	683.0	0.01%	1	683	INDIGO-TADZHIKISTAN-AS Indigo Tadzhikistan CJSC.
50	42996	665.0	0.01%
Total		99045.9	4.18%

50 Most active Prefixes for the past 31 days

RANK	PREFIX	UPDs	%	Origin AS -- AS NAME
1	192.12.120.0/24	72956	0.85%	5691 -- MITRE-AS-5 - The MITRE Corporation
2	213.91.175.0/24	40883	0.48%	8866 -- BTC-AS Bulgarian Telecommunication Company Plc.
3	83.228.71.0/24	36090	0.42%	8866 -- BTC-AS Bulgarian Telecommunication Company Plc. 8953 -- ASN-ORANGE-ROMANIA Orange Romania Autonomous System Number
4	24.121.123.0/24	32800	0.38%	25994 -- NPG-001 - NPG Cable, INC
5	221.128.192.0/18	25414	0.30%	18231 -- EXATT-AS-AP IOL NETCOM LTD
6	193.33.184.0/23	25306	0.29%	42787 -- MMIP-AS MultiMedia IP Ltd.
7	221.134.222.0/24	21473	0.25%	9583 -- SIFY-AS-IN Sify Limited
8	203.63.26.0/24	13323	0.15%	9747 -- EZINTERNET-AS-AP EZInternet Pty Ltd
9	210.214.128.0/23	12125	0.14%	9583 -- SIFY-AS-IN Sify Limited
10	193.239.114.0/24	11194	0.13%	31003 -- IRON-MOUNTAIN-UK-AS Iron Mountain UK Ltd
11	221.135.230.0/23	10380	0.12%	9583 -- SIFY-AS-IN Sify Limited
12	81.21.104.0/24	9757	0.11%	31065 -- MCIT
13	210.214.88.0/23	9416	0.11%	9583 -- SIFY-AS-IN Sify Limited
14	216.255.56.0/21	9214	0.11%	7106 -- OHIOBRIGHTNET - Com Net, Inc.
15	84.23.102.0/24	8629	0.10%	24731 -- ASN-NESMA National Engineering Services and Marketing Company Ltd. (NESMA) 34400 -- ASN-ETTIHADETISALAT Etihad Etisalat
16	64.68.1.0/24	8059	0.09%	13620 -- ASN-ELAN - Elan Communications, Inc.
17	64.68.0.0/24	8056	0.09%	13620 -- ASN-ELAN - Elan Communications, Inc.
18	64.68.9.0/24	8052	0.09%	13620 -- ASN-ELAN - Elan Communications, Inc.
19	64.68.3.0/24	8027	0.09%	13620 -- ASN-ELAN - Elan Communications, Inc.
20	216.151.192.0/19	7930	0.09%	13620 -- ASN-ELAN - Elan Communications, Inc.
21	192.166.49.0/24	7908	0.09%	3320 -- DTAG Deutsche Telekom AG
22	203.81.64.0/19	7371	0.09%	9988 -- MPT-AP Myanma Post and Telecommunication
23	63.239.134.0/24	7146	0.08%	29910 -- IACP - INTL. ASSN OF CHIEF OF POLICEI
24	203.101.87.0/24	6373	0.07%	9498 -- BBIL-AP BHARTI BT INTERNET LTD.
25	208.83.117.0/24	6361	0.07%	23082 -- MPHI - Michigan Public Health Institute
26	208.83.118.0/24	6361	0.07%	23082 -- MPHI - Michigan Public Health Institute
27	208.83.119.0/24	6359	0.07%	23082 -- MPHI - Michigan Public Health Institute
28	125.23.208.0/20	5999	0.07%	9498 -- BBIL-AP BHARTI BT INTERNET LTD.
29	210.214.26.0/24	5437	0.06%	9583 -- SIFY-AS-IN Sify Limited
30	202.154.27.0/24	4642	0.05%	38879 -- KHARISMANET-AP KHARISMA GLOBAL COMMUNICATION, PT 4434 -- ERX-RADNET1-AS PT Rahajasa Media Internet
31	63.77.135.0/24	4547	0.05%	40831 -- ROBERTSDYBDAHL - Roberts & Dybdahl Inc.
32	58.145.190.0/23	4453	0.05%	38069 -- WARIDTEL-BD-AS-AP Warid Telecom
33	58.145.188.0/23	4451	0.05%	38069 -- WARIDTEL-BD-AS-AP Warid Telecom
34	58.145.184.0/23	4447	0.05%	38069 -- WARIDTEL-BD-AS-AP Warid Telecom
35	202.144.54.0/24	4393	0.05%	9583 -- SIFY-AS-IN Sify Limited
36	123.231.132.0/22	4386	0.05%	38513 -- LINTASARTA-AS-ID PT Aplikanusa Lintasarta
37	147.185.176.0/20	4230	0.05%	26276 -- TIMKEN-USA - The Timken Company
38	212.60.64.0/19	3751	0.04%	25250 -- GAMTEL-AS
39	196.46.232.0/21	3723	0.04%	25250 -- GAMTEL-AS
40	199.26.8.0/21	3719	0.04%	14615 -- ROCK-HILL-TELEPHONE - Rock Hill Telephone Company
41	91.194.205.0/24	3696	0.04%	43303 -- CDNETWORKS-AS CDNetworks Network
42	41.223.212.0/22	3623	0.04%	25250 -- GAMTEL-AS
43	58.145.186.0/24	3546	0.04%	38069 -- WARIDTEL-BD-AS-AP Warid Telecom
44	58.145.187.0/24	3546	0.04%	38069 -- WARIDTEL-BD-AS-AP Warid Telecom
45	12.36.63.0/24	3505	0.04%	2386 -- INS-AS - AT&T Data Communications Services
46	67.55.128.0/18	3440	0.04%	5056 -- INS-NET-2 - Iowa Network Services
47	195.160.167.0/24	3342	0.04%	35627 -- PHYXIA Phyxia Networks
48	65.213.84.0/23	3332	0.04%	22077 -- RENAISSANCE-TECH - Renaissance Technologies Corp.
49	198.32.7.0/24	3248	0.04%	3944 -- PARTAN-LAB - Partan & Partan
50	208.126.64.0/18	3095	0.04%	5056 -- INS-NET-2 - Iowa Network Services
Total		519514	5.98%

31 Day BGP Profile: 4-June-2008 00:00 - 4-July-2008 23:59 (UTC+1000)

Number of BGP Update Messages:	5296009
Number of Prefix Updates:	8117190
Number of Prefix Withdrawals:	488870
Average Prefixes per BGP Update:	1.63
Average BGP Update Messages per second:	1.92
Average Prefix Updates per second:	3.11
Peak BGP Update Message Rate per second:	11524	(08:56:16 Tue, 24-Jun-2008)
Peak Prefix Update Rate per second:	3159	(21:27:37 Mon, 30-Jun-2008)
Peak Prefix Withdraw Rate per second:	21131	(21:42:32 Mon, 30-Jun-2008)
Prefix Count:	297167
Updated Prefix Count:	297166
Stable Prefix Count:	1
Origin AS Count:	29048
Updated Origin AS Count:	29034
Stable Origin AS Count:	14
Unique Path Count:	470140
Updated Path Count:	415890
Stable Path Count:	54250

Hourly Average of Per-Second Updated and Withdrawn Prefix Rate

Hourly Peak of Per-Second Updated and Withdrawn Prefix Rate

Hourly Average Per-Second Updated Prefix Rate by Update Type

Hourly Peak of Per-Second Updated Prefix Rate by Update Type

BGP Table Activity

Cumulative Distribution of per-Prefix and per-AS Updates

Notes

The data has been gathered using a single eBGP peering with AS 2.0. The observations of BGP path change are relative to this observation point. The updates are generated by a Quagga BGP implementation providing a timestamped log of incoming update messages. The timezone of this monitoring point is UTC+1000. Updates are processed on a 24 hour cycle.