09/21/97 Internet Routing Problems

From: stats@merit.edu
Date: Mon Sep 22 1997 - 10:00:05 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.
Send comments and questions to ipma@merit.edu

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Also see http://www.caida.org for more information about Internet statistics
collection research efforts.

Reserved Network and Host Announcements
---------------------------------------
192.221.5.240/29 at Mae-East from BBNplanet (AS1) ASPATH=1 IGP
198.60.153.49/32 at AADS from GoodNet (AS5696) ASPATH=5696 Incomplete
200.31.0.128/30 at Mae-East from Intermedia (AS6235) ASPATH=6235 6140 Incomplete
207.227.0.216/30 at Mae-East from INAP.net (AS5646) ASPATH=5646 5646 38 IGP
207.227.0.216/30 at Mae-West from INAP.net (AS5646) ASPATH=5646 5646 38 IGP
207.227.0.216/30 at AADS from INAP.net (AS5646) ASPATH=5646 38 IGP

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

1. USCyber (AS4136) at Mae-East 0 + 205093 = 205093 BGP prefix updates
2. internetMCI (AS3561) at AADS 65647 + 92595 = 158242 BGP prefix updates
3. Grid (AS6113) at Mae-West 319 + 133633 = 133952 BGP prefix updates
4. Grid (AS6113) at PacBell 319 + 133414 = 133733 BGP prefix updates
5. idc (AS4694) at Mae-West 141 + 132658 = 132799 BGP prefix updates
6. Grid (AS6113) at Mae-East 334 + 129544 = 129878 BGP prefix updates
7. DISA (AS568) at Mae-West 2876 + 95770 = 98646 BGP prefix updates
8. NetKonect (AS6716) at Mae-East 22 + 88946 = 88968 BGP prefix updates
9. internetMCI (AS3561) at PacBell 65588 + 19679 = 85267 BGP prefix updates
10. internetMCI (AS3561) at Mae-East 64905 + 19609 = 84514 BGP prefix updates

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

1. Euro(AS5390) at Mae-East 26.00 (26 ann, 1 entries)
2. GoodNet(AS5696) at AADS 16.48 (4632 ann, 281 entries)
3. GoodNet(AS5696) at Mae-West 15.33 (4691 ann, 306 entries)
4. DISC(AS7170) at Mae-East 13.69 (657 ann, 48 entries)
5. conxion(AS4544) at Mae-West 11.67 (35 ann, 3 entries)
6. DREN(AS668) at Mae-East 10.97 (2226 ann, 203 entries)
7. CWIX(AS5683) at Mae-West 10.14 (12891 ann, 1271 entries)
8. GoodNet(AS5696) at Mae-East 9.72 (2956 ann, 304 entries)
9. CWIX(AS5683) at Mae-East 9.53 (12044 ann, 1264 entries)
10. CWIX(AS5683) at Mae-West 9.42 (11970 ann, 1271 entries)
11. CWIX(AS5683) at Mae-East 9.33 (11797 ann, 1264 entries)
12. Digex(AS2548) at Mae-East 7.58 (4610 ann, 608 entries)
13. INS(AS6660) at Mae-East 6.99 (496 ann, 71 entries)
14. DISA(AS568) at Mae-West 6.38 (5288 ann, 829 entries)
15. Digex(AS2548) at Mae-West 6.22 (3792 ann, 610 entries)
16. DREN(AS668) at Mae-West 6.04 (1257 ann, 208 entries)
17. Dialnet(AS5552) at Mae-East 5.88 (453 ann, 77 entries)
18. Grid(AS6113) at PacBell 5.85 (4731 ann, 809 entries)
19. INSnet(AS5378) at Mae-East 5.63 (383 ann, 68 entries)
20. InterAccess(AS3789) at AADS 5.47 (104 ann, 19 entries)

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

1. SPRINT (1239) at mae-east 3347
2. internetMCI (3561) at aads 727
3. CWIX (5683) at mae-west 665
4. BBNplanet (1) at mae-east 422
5. AGIS (4200) at mae-east 366
6. Grid (6113) at mae-east 320
7. Digex (2548) at mae-west 145
8. CAIS (3491) at aads 144
9. NASA (297) at mae-west 132
10. EUnet (286) at mae-east 108






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