12/30/97 Internet Routing Problems

From: stats@merit.edu
Date: Wed Dec 31 1997 - 10:00:07 EST


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
---------------------------------------
133.55.0.11/32 at Mae-East from INAP.net (AS5646) ASPATH=5646 2907 IGP
133.55.0.11/32 at Mae-West from INAP.net (AS5646) ASPATH=5646 2907 IGP
194.117.132.188/30 at Mae-East from CableInet (AS5462) ASPATH=5462 6676 IGP
194.117.132.224/27 at Mae-East from CableInet (AS5462) ASPATH=5462 6676 IGP
205.181.249.35/32 at Mae-East from Intermedia (AS6235) ASPATH=6235 5651 6433 IGP
205.181.249.37/32 at Mae-East from Intermedia (AS6235) ASPATH=6235 5651 6433 IGP
209.100.89.0/27 at Mae-East from INAP.net (AS5646) ASPATH=5646 10268 IGP
209.100.89.128/27 at Mae-East from INAP.net (AS5646) ASPATH=5646 10268 IGP
209.100.89.160/27 at Mae-East from INAP.net (AS5646) ASPATH=5646 10268 IGP
209.100.89.192/27 at Mae-East from INAP.net (AS5646) ASPATH=5646 10268 IGP
209.100.89.224/27 at Mae-East from INAP.net (AS5646) ASPATH=5646 10268 IGP
209.100.89.32/27 at Mae-East from INAP.net (AS5646) ASPATH=5646 10268 IGP
209.100.89.64/27 at Mae-East from INAP.net (AS5646) ASPATH=5646 10268 IGP
209.100.89.96/27 at Mae-East from INAP.net (AS5646) ASPATH=5646 10268 IGP
209.100.91.0/27 at Mae-East from INAP.net (AS5646) ASPATH=5646 10268 IGP
209.95.130.0/27 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 INCOMPLETE

Reserved AS Numbers
-------------------
AS65515 at Mae-East from Digex (AS2548) ASPATH=2548 5415 5593 65515 8207 IGP

AS65515 at Mae-West from Digex (AS2548) ASPATH=2548 5415 65515 8207 IGP

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

1. NetKonect (AS6716) at Mae-East 0 + 203505 = 203505 BGP prefix updates
2. USCyber (AS4136) at Mae-East 0 + 88603 = 88603 BGP prefix updates
3. GetNet (AS5784) at Mae-East 0 + 74559 = 74559 BGP prefix updates
4. SPRINT (AS1239) at Mae-East 52581 + 17756 = 70337 BGP prefix updates
5. internetMCI (AS3561) at AADS 25770 + 12194 = 37964 BGP prefix updates
6. internetMCI (AS3561) at Mae-East 26979 + 10241 = 37220 BGP prefix updates
7. ANS (AS1673) at Mae-East 21482 + 2000 = 23482 BGP prefix updates
8. telia (AS1299) at Mae-East 218 + 22019 = 22237 BGP prefix updates
9. CompuServe (AS4183) at Mae-East 8 + 21368 = 21376 BGP prefix updates
10. CWIX (AS5683) at Mae-East 10921 + 10069 = 20990 BGP prefix updates

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

1. EXODUS(AS3967) at AADS 25.78 (2655 ann, 103 entries)
2. EXODUS(AS3967) at Mae-East 22.68 (2336 ann, 103 entries)
3. IBMGlobal(AS2685) at AADS 13.57 (543 ann, 40 entries)
4. Cableol(AS5089) at Mae-East 12.75 (51 ann, 4 entries)
5. ANS(AS1673) at Mae-East 12.49 (21482 ann, 1720 entries)
6. NetAxs(AS4969) at Mae-East 9.06 (1078 ann, 119 entries)
7. OLEANE(AS2917) at Mae-East 9.03 (361 ann, 40 entries)
8. Nacamar(AS3257) at Mae-East 8.48 (551 ann, 65 entries)
9. INCnet(AS3857) at AADS 7.55 (423 ann, 56 entries)
10. HLC(AS4565) at AADS 7.38 (502 ann, 68 entries)
11. HLC(AS4565) at Mae-East 6.75 (459 ann, 68 entries)
12. CWIX(AS5683) at Mae-East 6.06 (11120 ann, 1836 entries)
13. CWIX(AS5683) at Mae-East 5.95 (10921 ann, 1836 entries)
14. Digex(AS2548) at Mae-East 4.59 (3910 ann, 851 entries)
15. InterAccess(AS3789) at AADS 4.23 (110 ann, 26 entries)
16. Internex(AS2828) at AADS 3.92 (235 ann, 60 entries)
17. Internex(AS2828) at Mae-East 3.70 (222 ann, 60 entries)
18. DISA(AS568) at Mae-West 3.21 (1813 ann, 564 entries)
19. INS(AS6660) at Mae-East 3.21 (196 ann, 61 entries)
20. WireHub(AS5496) at Mae-East 2.73 (41 ann, 15 entries)

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

1. SPRINT (1239) at mae-east 3580
2. internetMCI (3561) at aads 985
3. BBNplanet (1) at mae-west 405
4. AGIS (4200) at mae-east 364
5. IBMGlobal (2685) at mae-east 208
6. Grid (6113) at mae-west 189
7. Digex (2548) at mae-east 172
8. INAP.net (5646) at aads 167
9. CAIS (3491) at aads 165
10. AT&T (6478) at pb 159






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