10/07/97 Internet Routing Problems

From: stats@merit.edu
Date: Wed Oct 08 1997 - 10:00:04 EDT


See http://www.merit.edu/ipma for a more detailed report on
routing problems and recommendations on ways service providers can
limit the spread of invalid routing information.
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collection research efforts.

Reserved Network and Host Announcements
---------------------------------------
192.116.206.112/28 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.206.128/27 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.206.192/27 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.206.80/28 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.206.96/28 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.207.0/27 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.207.48/28 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.207.64/28 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.213.48/28 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.226.64/27 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.226.96/27 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
198.60.153.49/32 at Mae-East from GoodNet (AS5696) ASPATH=5696 Incomplete
199.222.33.0/28 at Mae-East from ANS (AS1673) ASPATH=1673 1674 IGP
199.222.33.16/28 at Mae-East from ANS (AS1673) ASPATH=1673 1674 IGP
202.223.244.128/32 at Mae-East from INAP.net (AS5646) ASPATH=5646 2907 IGP
202.223.244.96/32 at Mae-East from INAP.net (AS5646) ASPATH=5646 2907 IGP
204.151.108.32/29 at Mae-West from ANS (AS1673) ASPATH=1673 1699 IGP
206.80.170.204/30 at Mae-East from Grid (AS6113) ASPATH=6113 IGP
206.80.170.204/30 at PacBell from Grid (AS6113) ASPATH=6113 IGP
207.212.14.32/27 at Mae-East from AGIS (AS4200) ASPATH=4200 5672 10501 IGP
209.62.41.4/30 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 5009 Incomplete
209.62.41.4/30 at Mae-East from ACSI (AS6467) ASPATH=6467 5009 Incomplete
209.62.41.4/30 at Mae-West from ACSI (AS6467) ASPATH=6467 5009 Incomplete
209.62.41.5/32 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 5009 Incomplete
209.62.41.5/32 at Mae-East from ACSI (AS6467) ASPATH=6467 5009 Incomplete
209.62.41.5/32 at Mae-West from ACSI (AS6467) ASPATH=6467 5009 Incomplete
209.62.41.8/30 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 5009 Incomplete
209.62.41.8/30 at Mae-East from ACSI (AS6467) ASPATH=6467 5009 Incomplete
209.62.41.8/30 at Mae-West from ACSI (AS6467) ASPATH=6467 5009 Incomplete
210.137.74.96/27 at Mae-East from INAP.net (AS5646) ASPATH=5646 2907 Incomplete

Largest Sources of BGP Instability
----------------------------------
(announcements + withdraws = total)

1. DISA (AS568) at Mae-West 8302 + 7488106 = 7496408 BGP prefix updates
2. GetNet (AS5784) at Mae-East 62 + 2276285 = 2276347 BGP prefix updates
3. NetKonect (AS6716) at Mae-East 23 + 820544 = 820567 BGP prefix updates
4. idc (AS4694) at Mae-West 497 + 656283 = 656780 BGP prefix updates
5. USCyber (AS4136) at Mae-East 1 + 520038 = 520039 BGP prefix updates
6. Grid (AS6113) at Mae-West 2642 + 473361 = 476003 BGP prefix updates
7. Grid (AS6113) at PacBell 3574 + 472158 = 475732 BGP prefix updates
8. Grid (AS6113) at Mae-East 5630 + 447502 = 453132 BGP prefix updates
9. Interpath (AS3407) at Mae-East 292 + 292637 = 292929 BGP prefix updates
10. SPRINT (AS1239) at Mae-East 165528 + 42372 = 207900 BGP prefix updates

Instability Ranking of Service Providers
----------------------------------------
(The number of BGP announcements divided by the number
of routing table entries)

1. Intermedia(AS6235) at Mae-East 44.15 (4283 ann, 97 entries)
2. INSnet(AS5378) at Mae-East 28.49 (2023 ann, 71 entries)
3. AI(AS6405) at Mae-East 22.00 (22 ann, 1 entries)
4. Netcom(AS2551) at Mae-East 19.76 (6700 ann, 339 entries)
5. ICI(AS6561) at Mae-West 18.07 (271 ann, 15 entries)
6. AT&T(AS6478) at Mae-East 17.44 (22948 ann, 1316 entries)
7. Nacamar(AS3257) at Mae-West 13.77 (592 ann, 43 entries)
8. Nacamar(AS3257) at Mae-East 13.69 (657 ann, 48 entries)
9. AT&T(AS6478) at AADS 13.58 (15619 ann, 1150 entries)
10. INS(AS6660) at Mae-East 12.58 (918 ann, 73 entries)
11. Xara(AS5413) at Mae-East 12.55 (665 ann, 53 entries)
12. AT&T(AS6478) at PacBell 12.41 (14285 ann, 1151 entries)
13. AGIS(AS4200) at Mae-East 11.64 (20536 ann, 1764 entries)
14. NetAxs(AS4969) at Mae-East 10.70 (792 ann, 74 entries)
15. ThePlanet(AS5388) at Mae-East 10.55 (306 ann, 29 entries)
16. GoodNet(AS5696) at Mae-East 10.18 (4355 ann, 428 entries)
17. DISA(AS568) at Mae-West 9.40 (8302 ann, 883 entries)
18. ThePlanet(AS5388) at Mae-West 8.68 (243 ann, 28 entries)
19. MainStreet(AS3720) at Mae-West 8.59 (232 ann, 27 entries)
20. Digex(AS2548) at Mae-East 8.43 (7260 ann, 861 entries)

Count of Announced Prefixes with AS origin IRR Discrepancies
------------------------------------------------------------
(See http://www.merit.edu/ipma/problems/)

1. SPRINT (1239) at mae-east 3554
2. internetMCI (3561) at aads 595
3. AGIS (4200) at mae-east 411
4. BBNplanet (1) at mae-west 364
5. AT&T (6478) at mae-east 215
6. Grid (6113) at mae-east 186
7. CWIX (5683) at mae-east 156
8. Digex (2548) at mae-west 153
9. EUnet (286) at mae-east 136
10. CAIS (3491) at mae-west 129






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