05/04/98 Internet Routing Problems

From: stats@merit.edu
Date: Tue May 05 1998 - 10:00:03 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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Also see http://www.caida.org for more information about Internet statistics
collection research efforts.

Reserved Network and Host Announcements
---------------------------------------
193.234.249.64/27 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1833 1299 3301 INCOMPLETE
195.12.164.128/28 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 8516 INCOMPLETE
195.12.164.144/28 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 8516 INCOMPLETE
195.12.164.160/27 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 8516 INCOMPLETE
195.12.164.192/27 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 8516 INCOMPLETE
195.12.164.248/29 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 8516 INCOMPLETE
195.89.17.81/32 at Mae-East from NetAxs (AS4969) ASPATH=4969 8001 6889 IGP
199.79.133.2/32 at Mae-East from NetAxs (AS4969) ASPATH=4969 3066 IGP
199.79.133.2/32 at Mae-East from Seastrom (AS3066) ASPATH=3066 IGP
200.30.42.16/28 at Mae-East from AGIS (AS4200) ASPATH=4200 6371 7997 INCOMPLETE
200.30.42.32/27 at Mae-East from AGIS (AS4200) ASPATH=4200 6371 7997 INCOMPLETE
200.30.42.64/29 at Mae-East from AGIS (AS4200) ASPATH=4200 6371 7997 INCOMPLETE
200.30.42.72/29 at Mae-East from AGIS (AS4200) ASPATH=4200 6371 7997 INCOMPLETE
200.30.42.80/30 at Mae-East from AGIS (AS4200) ASPATH=4200 6371 7997 INCOMPLETE
205.214.73.8/29 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 2941 IGP
205.214.73.8/29 at Mae-East from ACSI (AS6467) ASPATH=6467 2941 IGP
205.214.73.8/29 at Mae-West from ACSI (AS6467) ASPATH=6467 2941 IGP
206.84.149.20/32 at Mae-East from AGIS (AS4200) ASPATH=4200 IGP
209.88.14.0/28 at Mae-East from AGIS (AS4200) ASPATH=4200 6371 7997 INCOMPLETE
209.88.14.128/27 at Mae-East from AGIS (AS4200) ASPATH=4200 6371 7997 INCOMPLETE
209.88.14.192/28 at Mae-East from AGIS (AS4200) ASPATH=4200 6371 7997 INCOMPLETE
209.88.14.240/28 at Mae-East from AGIS (AS4200) ASPATH=4200 6371 7997 INCOMPLETE
209.88.14.32/28 at Mae-East from AGIS (AS4200) ASPATH=4200 6371 7997 INCOMPLETE
209.88.14.64/28 at Mae-East from AGIS (AS4200) ASPATH=4200 6371 7997 INCOMPLETE
209.88.14.96/28 at Mae-East from AGIS (AS4200) ASPATH=4200 6371 7997 INCOMPLETE
209.88.15.0/27 at Mae-East from AGIS (AS4200) ASPATH=4200 6371 7997 INCOMPLETE

Reserved AS Numbers
-------------------
AS65000 at Mae-East from internetMCI (AS3561) ASPATH=3561 4230 65000 IGP

AS65350 at Mae-East from VisiNet (AS6261) ASPATH=6261 7594 65350 7704 IGP

AS65531 at Mae-East from VisiNet (AS6261) ASPATH=6261 7594 65350 7706 65531 IGP

AS65350 at Mae-West from VisiNet (AS6261) ASPATH=6261 7594 65350 7704 IGP

AS65531 at Mae-West from VisiNet (AS6261) ASPATH=6261 7594 65350 7706 65531 IGP

AS65000 at AADS from internetMCI (AS3561) ASPATH=3561 4230 65000 IGP

AS65350 at AADS from CAIS (AS3491) ASPATH=3491 6261 7594 65350 7704 IGP

AS65531 at AADS from CAIS (AS3491) ASPATH=3491 6261 7594 65350 7706 65531 IGP

AS65000 at PacBell from internetMCI (AS3561) ASPATH=3561 4230 65000 IGP

AS65350 at Paix from OurWorld (AS7594) ASPATH=7594 65350 7704 IGP

AS65531 at Paix from OurWorld (AS7594) ASPATH=7594 65350 7706 65531 IGP

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

1. internetMCI (AS3561) at AADS 124874 + 15475 = 140349 BGP prefix updates
2. SPRINT (AS1239) at Mae-East 62987 + 17060 = 80047 BGP prefix updates
3. internetMCI (AS3561) at PacBell 63547 + 13495 = 77042 BGP prefix updates
4. internetMCI (AS3561) at Mae-East 40452 + 14673 = 55125 BGP prefix updates
5. IBMGlobal (AS2685) at Mae-West 49635 + 347 = 49982 BGP prefix updates
6. CAIS (AS3491) at Mae-West 18127 + 10949 = 29076 BGP prefix updates
7. CAIS (AS3491) at AADS 14659 + 10921 = 25580 BGP prefix updates
8. CAIS (AS3491) at Mae-East 14630 + 10940 = 25570 BGP prefix updates
9. AT&T (AS6478) at AADS 21296 + 2516 = 23812 BGP prefix updates
10. Digex (AS2548) at Mae-East 20067 + 575 = 20642 BGP prefix updates

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

1. VisiNet(AS6261) at Mae-East 38.71 (8439 ann, 218 entries)
2. OurWorld(AS7594) at Mae-West 14.11 (3387 ann, 240 entries)
3. VisiNet(AS6261) at Mae-West 13.92 (2978 ann, 214 entries)
4. IBMGlobal(AS2685) at AADS 8.03 (594 ann, 74 entries)
5. AIMnet(AS3763) at Mae-West 7.92 (412 ann, 52 entries)
6. ANS(AS1673) at Mae-East 5.91 (10381 ann, 1757 entries)
7. CableInet(AS5462) at Mae-East 3.94 (126 ann, 32 entries)
8. OurWorld(AS7594) at Paix 3.91 (942 ann, 241 entries)
9. CableInet(AS5462) at Mae-West 3.87 (120 ann, 31 entries)
10. SPRINT(AS1239) at Mae-East 3.74 (81666 ann, 21852 entries)
11. GEOnet(AS3356) at PacBell 3.63 (374 ann, 103 entries)
12. internetMCI(AS3561) at AADS 2.49 (44137 ann, 17711 entries)
13. EUnet(AS286) at Mae-East 2.46 (2140 ann, 871 entries)
14. ISI.Net(AS6196) at Mae-West 2.40 (358 ann, 149 entries)
15. IOS(AS5000) at AADS 2.21 (73 ann, 33 entries)
16. NetKonect(AS6716) at Mae-East 2.14 (15 ann, 7 entries)
17. BBNplanet(AS1) at Mae-East 1.96 (12441 ann, 6342 entries)
18. ISI.Net(AS6196) at Mae-East 1.91 (354 ann, 185 entries)
19. IOS(AS5000) at Mae-West 1.91 (63 ann, 33 entries)
20. internetMCI(AS3561) at Mae-East 1.89 (33574 ann, 17744 entries)

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

1. SPRINT (1239) at mae-east 3843
2. internetMCI (3561) at pb 805
3. BBNplanet (1) at mae-west 517
4. Digex (2548) at mae-west 392
5. Grid (6113) at pb 359
6. AGIS (4200) at mae-east 327
7. IBMGlobal (2685) at mae-west 290
8. AT&T (6478) at aads 228
9. INAP.net (5646) at aads 218
10. CAIS (3491) at aads 167






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