02/25/98 Internet Routing Problems

From: stats@merit.edu
Date: Thu Feb 26 1998 - 10:00:04 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
---------------------------------------
192.168.203.38/32 at AADS from Merit (AS237) ASPATH=237 INCOMPLETE
192.168.203.38/32 at AADS from Merit (AS237) ASPATH=237 INCOMPLETE
194.250.214.0/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.0/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.0/27 at PacBell from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.128/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.128/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.128/27 at PacBell from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.160/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.192/28 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.192/28 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.192/28 at PacBell from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.208/28 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.208/28 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.208/28 at PacBell from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.224/28 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.240/28 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.32/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.64/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.64/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.64/27 at PacBell from ANS (AS1673) ASPATH=1673 1699 6712 IGP
194.250.214.96/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.12.164.128/28 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 1299 1299 8516 INCOMPLETE
195.12.164.144/28 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 1299 1299 8516 INCOMPLETE
195.12.164.248/29 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 1299 1299 8516 INCOMPLETE
195.12.165.0/29 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 1299 1299 8516 INCOMPLETE
207.26.64.80/28 at Mae-East from ANS (AS1673) ASPATH=1673 1324 IGP
207.26.64.80/28 at Mae-West from ANS (AS1673) ASPATH=1673 1675 IGP
207.26.64.80/28 at PacBell from ANS (AS1673) ASPATH=1673 1675 IGP

Reserved AS Numbers
-------------------
AS65010 at Mae-East from ANS (AS1673) ASPATH=1673
AS65010 at PacBell from ANS (AS1673) ASPATH=1673

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

1. SPRINT (AS1239) at Mae-East 185326 + 18872 = 204198 BGP prefix updates
2. idc (AS4694) at Mae-West 478 + 131244 = 131722 BGP prefix updates
3. NetKonect (AS6716) at Mae-East 10 + 67145 = 67155 BGP prefix updates
4. MainStreet (AS3720) at Mae-West 2 + 54803 = 54805 BGP prefix updates
5. internetMCI (AS3561) at AADS 33110 + 14187 = 47297 BGP prefix updates
6. internetMCI (AS3561) at Mae-East 33963 + 13172 = 47135 BGP prefix updates
7. internetMCI (AS3561) at PacBell 31002 + 12929 = 43931 BGP prefix updates
8. WNA (AS2914) at Mae-East 11387 + 6026 = 17413 BGP prefix updates
9. WNA (AS2914) at Mae-West 11326 + 5318 = 16644 BGP prefix updates
10. ANS (AS1673) at Mae-East 12667 + 785 = 13452 BGP prefix updates

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

1. Intelenet(AS5693) at Mae-West 56.00 (56 ann, 1 entries)
2. Cableol(AS5089) at Mae-East 27.50 (110 ann, 4 entries)
3. NetAxs(AS4969) at Mae-East 26.06 (5159 ann, 198 entries)
4. OneCall(AS6402) at AADS 20.08 (1546 ann, 77 entries)
5. OneCall(AS6402) at PacBell 19.52 (1503 ann, 77 entries)
6. OneCall(AS6402) at Mae-East 19.52 (1503 ann, 77 entries)
7. AIMnet(AS3763) at Mae-West 16.70 (835 ann, 50 entries)
8. Above(AS6461) at Mae-East 14.51 (4106 ann, 283 entries)
9. WCG(AS7911) at PacBell 11.50 (23 ann, 2 entries)
10. highway1(AS7922) at Mae-West 10.75 (86 ann, 8 entries)
11. WCG(AS7911) at AADS 10.50 (21 ann, 2 entries)
12. CompuServe(AS4183) at Mae-East 10.29 (566 ann, 55 entries)
13. Above(AS6461) at PacBell 10.22 (2913 ann, 285 entries)
14. highway1(AS7922) at Mae-East 10.00 (80 ann, 8 entries)
15. WNA(AS2914) at Mae-East 9.35 (11387 ann, 1218 entries)
16. SPRINT(AS1239) at Mae-East 9.21 (185326 ann, 20115 entries)
17. u-net(AS5669) at Mae-West 9.14 (64 ann, 7 entries)
18. EXODUS(AS3967) at PacBell 8.78 (1018 ann, 116 entries)
19. HLC(AS4565) at Mae-West 8.46 (499 ann, 59 entries)
20. HLC(AS4565) at AADS 8.41 (496 ann, 59 entries)

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

1. SPRINT (1239) at mae-east 3862
2. internetMCI (3561) at aads 990
3. AGIS (4200) at mae-east 343
4. BBNplanet (1) at mae-west 332
5. IBMGlobal (2685) at mae-east 235
6. Grid (6113) at mae-west 217
7. Digex (2548) at mae-west 190
8. CAIS (3491) at aads 163
9. AT&T (6478) at mae-west 142
10. INAP.net (5646) at aads 139






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