04/13/98 Internet Routing Problems

From: stats@merit.edu
Date: Tue Apr 14 1998 - 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.
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Reserved Network and Host Announcements
---------------------------------------
1.0.0.0/8 at Mae-West from CAIS (AS3491) ASPATH=3491 6261 7594 INCOMPLETE
137.39.133.88/30 at Mae-West from Best (AS3915) ASPATH=3915 INCOMPLETE
144.228.111.4/30 at Mae-West from Best (AS3915) ASPATH=3915 INCOMPLETE
166.48.13.248/30 at Mae-West from Best (AS3915) ASPATH=3915 INCOMPLETE
193.234.249.64/27 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1833 1299 3301 INCOMPLETE
198.32.136.37/32 at Mae-West from Best (AS3915) ASPATH=3915 INCOMPLETE
199.88.124.96/27 at Mae-West from Best (AS3915) ASPATH=3915 INCOMPLETE
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
204.156.170.148/30 at Mae-West from Best (AS3915) ASPATH=3915 INCOMPLETE
206.185.236.4/30 at Mae-East from AGIS (AS4200) ASPATH=4200 IGP
206.251.0.88/30 at Mae-West from Best (AS3915) ASPATH=3915 INCOMPLETE
206.54.15.14/32 at Mae-West from Best (AS3915) ASPATH=3915 INCOMPLETE
206.84.149.20/32 at Mae-East from AGIS (AS4200) ASPATH=4200 IGP
206.84.236.4/30 at Mae-East from AGIS (AS4200) ASPATH=4200 IGP
206.84.253.244/32 at Mae-East from AGIS (AS4200) ASPATH=4200 IGP
207.171.204.254/32 at Mae-West from Best (AS3915) ASPATH=3915 INCOMPLETE
207.181.192.1/32 at Mae-West from Best (AS3915) ASPATH=3915 INCOMPLETE
209.1.169.96/30 at Mae-West from Best (AS3915) ASPATH=3915 INCOMPLETE
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
209.88.14.240/28 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
209.88.15.0/27 at Mae-East from AGIS (AS4200) ASPATH=4200 6371 7997 INCOMPLETE

Reserved AS Numbers
-------------------
AS64600 at Mae-East from NASA (AS297) ASPATH=297 64600 IGP

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

AS64600 at Mae-West from NASA (AS297) ASPATH=297 64600 IGP

AS65035 at Mae-West from VisiNet (AS6261) ASPATH=6261 7594 7593 65035 IGP

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

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

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

1. SPRINT (AS1239) at Mae-East 113870 + 39259 = 153129 BGP prefix updates
2. internetMCI (AS3561) at PacBell 55422 + 9973 = 65395 BGP prefix updates
3. Nacamar (AS3257) at Mae-West 32515 + 32332 = 64847 BGP prefix updates
4. internetMCI (AS3561) at Mae-East 52367 + 11602 = 63969 BGP prefix updates
5. internetMCI (AS3561) at AADS 50384 + 8844 = 59228 BGP prefix updates
6. IOS (AS5000) at Mae-West 39 + 50540 = 50579 BGP prefix updates
7. IOS (AS5000) at Mae-East 35 + 50510 = 50545 BGP prefix updates
8. IOS (AS5000) at AADS 37 + 50498 = 50535 BGP prefix updates
9. AGIS (AS4200) at Mae-East 28088 + 7101 = 35189 BGP prefix updates
10. MainStreet (AS3720) at Mae-West 0 + 17213 = 17213 BGP prefix updates

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

1. Nacamar(AS3257) at Mae-West 163.55 (11612 ann, 71 entries)
2. NetAxs(AS4969) at Mae-East 19.32 (4038 ann, 209 entries)
3. Nacamar(AS3257) at Mae-East 16.42 (1215 ann, 74 entries)
4. IBMGlobal(AS2685) at AADS 15.44 (278 ann, 18 entries)
5. Priori(AS10303) at Mae-East 13.23 (397 ann, 30 entries)
6. Priori(AS10303) at Mae-West 11.26 (394 ann, 35 entries)
7. AIMnet(AS3763) at Mae-West 8.52 (443 ann, 52 entries)
8. u-net(AS5669) at Mae-West 6.70 (67 ann, 10 entries)
9. AT&T(AS6478) at PacBell 5.38 (19457 ann, 3615 entries)
10. AT&T(AS6478) at AADS 4.66 (16838 ann, 3610 entries)
11. Priori(AS10303) at Paix 3.60 (108 ann, 30 entries)
12. ANS(AS1673) at Mae-East 2.86 (4663 ann, 1631 entries)
13. highway1(AS7922) at Mae-East 2.78 (25 ann, 9 entries)
14. CAIS(AS3491) at AADS 2.76 (2515 ann, 910 entries)
15. CAIS(AS3491) at Mae-West 2.64 (2547 ann, 965 entries)
16. highway1(AS7922) at Mae-West 2.56 (23 ann, 9 entries)
17. VisiNet(AS6261) at Mae-West 2.55 (512 ann, 201 entries)
18. VisiNet(AS6261) at Mae-East 2.50 (506 ann, 202 entries)
19. AT&T(AS6478) at Mae-West 2.50 (9045 ann, 3613 entries)
20. OurWorld(AS7594) at Mae-West 2.38 (435 ann, 183 entries)

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

1. SPRINT (1239) at mae-east 3975
2. internetMCI (3561) at aads 741
3. BBNplanet (1) at mae-west 453
4. AGIS (4200) at mae-east 378
5. Grid (6113) at pb 344
6. IBMGlobal (2685) at mae-east 287
7. AT&T (6478) at aads 232
8. Digex (2548) at mae-west 223
9. INAP.net (5646) at aads 170
10. NASA (297) at mae-west 170






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