04/10/98 Internet Routing Problems

From: stats@merit.edu
Date: Sat Apr 11 1998 - 10:00:08 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
---------------------------------------
1.0.0.0/8 at Mae-East from WNA (AS2914) ASPATH=2914 2497 4774 4651 7470 INCOMPLETE
1.0.0.0/8 at Mae-East from WNA (AS2914) ASPATH=2914 2497 4774 4651 7470 INCOMPLETE
1.0.0.0/8 at Mae-West from WNA (AS2914) ASPATH=2914 2497 4774 4651 7470 INCOMPLETE
1.0.0.0/8 at Mae-West from CERFnet (AS1740) ASPATH=1740 2914 2497 4774 4651 7470 INCOMPLETE
1.0.0.0/8 at Mae-West from CERFnet (AS1740) ASPATH=1740 2914 2497 4774 4651 7470 INCOMPLETE
1.0.0.0/8 at Mae-West from WNA (AS2914) ASPATH=2914 2497 4774 4651 7470 INCOMPLETE
193.234.249.64/27 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1833 1299 3301 INCOMPLETE
194.207.0.128/28 at Mae-West from VBC (AS6320) ASPATH=6320 IGP
195.101.148.0/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.101.148.0/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.101.148.128/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.101.148.128/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.101.148.160/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.101.148.160/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.101.148.192/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.101.148.192/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.101.148.224/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.101.148.224/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.101.148.32/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.101.148.32/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.101.148.64/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.101.148.64/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.101.148.96/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.101.148.96/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.6.71.0/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.6.71.0/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.6.71.128/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.6.71.128/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.6.71.160/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.6.71.160/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.6.71.192/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.6.71.192/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.6.71.224/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.6.71.224/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.6.71.32/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.6.71.32/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.6.71.64/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.6.71.64/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.6.71.96/27 at Mae-East from ANS (AS1673) ASPATH=1673 1699 6712 IGP
195.6.71.96/27 at Mae-West from ANS (AS1673) ASPATH=1673 1699 6712 IGP
198.80.116.192/27 at Mae-East from ANS (AS1673) ASPATH=1673 1670 IGP
198.80.116.192/27 at Mae-West from ANS (AS1673) ASPATH=1673 1670 IGP
198.80.116.192/27 at PacBell from ANS (AS1673) ASPATH=1673 1670 IGP
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

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

AS65350 at Mae-East from CAIS (AS3491) ASPATH=3491 6261 7594 65350 7702 IGP

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

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

AS65531 at Mae-West from CAIS (AS3491) ASPATH=3491 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 7702 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. SPRINT (AS1239) at Mae-East 143181 + 23459 = 166640 BGP prefix updates
2. MainStreet (AS3720) at Mae-West 1176 + 84944 = 86120 BGP prefix updates
3. Nacamar (AS3257) at Mae-West 41386 + 40231 = 81617 BGP prefix updates
4. BBNplanet (AS1) at Mae-West 38680 + 2000 = 40680 BGP prefix updates
5. internetMCI (AS3561) at Mae-East 29169 + 11148 = 40317 BGP prefix updates
6. internetMCI (AS3561) at AADS 28863 + 10578 = 39441 BGP prefix updates
7. internetMCI (AS3561) at PacBell 26742 + 10334 = 37076 BGP prefix updates
8. WNA (AS2914) at Mae-West 32685 + 1832 = 34517 BGP prefix updates
9. INAP.net (AS5646) at Mae-West 33954 + 317 = 34271 BGP prefix updates
10. GoodNet (AS5696) at Mae-West 18686 + 372 = 19058 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 421.08 (10948 ann, 26 entries)
2. VisiNet(AS6261) at Mae-East 147.28 (6922 ann, 47 entries)
3. Cableol(AS5089) at Mae-East 20.25 (81 ann, 4 entries)
4. CAIS(AS3491) at Mae-West 14.63 (14616 ann, 999 entries)
5. CAIS(AS3491) at AADS 12.71 (10990 ann, 865 entries)
6. IBMGlobal(AS2685) at AADS 11.24 (236 ann, 21 entries)
7. OurWorld(AS7594) at Mae-West 10.23 (1892 ann, 185 entries)
8. AIMnet(AS3763) at Mae-West 9.83 (511 ann, 52 entries)
9. CAIS(AS3491) at Mae-East 6.60 (11409 ann, 1728 entries)
10. CAIS(AS3491) at Mae-East 6.57 (11359 ann, 1728 entries)
11. Priori(AS10303) at Mae-East 5.24 (257 ann, 49 entries)
12. highway1(AS7922) at Mae-West 4.67 (42 ann, 9 entries)
13. highway1(AS7922) at Mae-East 3.67 (33 ann, 9 entries)
14. Nacamar(AS3257) at Mae-East 3.53 (261 ann, 74 entries)
15. DRA(AS1746) at Mae-West 3.17 (38 ann, 12 entries)
16. Grid(AS6113) at Mae-West 2.76 (7767 ann, 2817 entries)
17. OurWorld(AS7594) at Paix 2.43 (450 ann, 185 entries)
18. Above(AS6461) at Mae-East 2.15 (602 ann, 280 entries)
19. netrail(AS4006) at Mae-East 2.12 (36 ann, 17 entries)
20. DRA(AS1746) at AADS 2.09 (23 ann, 11 entries)

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

1. SPRINT (1239) at mae-east 3948
2. internetMCI (3561) at aads 759
3. BBNplanet (1) at mae-west 475
4. AGIS (4200) at mae-east 356
5. Grid (6113) at pb 348
6. IBMGlobal (2685) at mae-east 246
7. AT&T (6478) at pb 236
8. Digex (2548) at mae-west 229
9. INAP.net (5646) at aads 173
10. CAIS (3491) at aads 149






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