04/25/98 Internet Routing Problems

From: stats@merit.edu
Date: Sun Apr 26 1998 - 10:00:07 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.
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
---------------------------------------
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
198.80.9.0/28 at Mae-West from ANS (AS1673) ASPATH=1673 1327 1684 IGP
198.80.9.0/28 at PacBell from ANS (AS1673) ASPATH=1673 1327 1684 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
209.88.14.240/28 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
-------------------
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

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. internetMCI (AS3561) at AADS 131544 + 10681 = 142225 BGP prefix updates
2. internetMCI (AS3561) at Mae-East 42558 + 11206 = 53764 BGP prefix updates
3. SPRINT (AS1239) at Mae-East 33837 + 12798 = 46635 BGP prefix updates
4. internetMCI (AS3561) at PacBell 22735 + 10835 = 33570 BGP prefix updates
5. MainStreet (AS3720) at Mae-West 6 + 13449 = 13455 BGP prefix updates
6. ANS (AS1673) at Mae-East 12397 + 276 = 12673 BGP prefix updates
7. Digex (AS2548) at Mae-East 7814 + 4692 = 12506 BGP prefix updates
8. Digex (AS2548) at Mae-West 6718 + 5464 = 12182 BGP prefix updates
9. netrail (AS4006) at PacBell 0 + 10477 = 10477 BGP prefix updates
10. BBNplanet (AS1) at Mae-East 5822 + 2841 = 8663 BGP prefix updates

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

1. Cableol(AS5089) at Mae-East 18.75 (75 ann, 4 entries)
2. VisiNet(AS6261) at Mae-East 14.53 (712 ann, 49 entries)
3. VisiNet(AS6261) at Mae-West 13.77 (661 ann, 48 entries)
4. IBMGlobal(AS2685) at AADS 9.57 (871 ann, 91 entries)
5. AIMnet(AS3763) at Mae-West 7.90 (411 ann, 52 entries)
6. OurWorld(AS7594) at Mae-West 6.89 (1226 ann, 178 entries)
7. highway1(AS7922) at Mae-East 6.00 (54 ann, 9 entries)
8. highway1(AS7922) at Mae-West 5.44 (49 ann, 9 entries)
9. OurWorld(AS7594) at Paix 2.77 (491 ann, 177 entries)
10. ANS(AS1673) at Mae-East 2.54 (4350 ann, 1711 entries)
11. Erols(AS6079) at Mae-East 2.53 (38 ann, 15 entries)
12. Above(AS6461) at Mae-East 2.37 (835 ann, 352 entries)
13. AT&T(AS6478) at PacBell 2.37 (8968 ann, 3787 entries)
14. internetMCI(AS3561) at AADS 2.30 (40544 ann, 17659 entries)
15. InterAccess(AS3789) at AADS 2.21 (62 ann, 28 entries)
16. Primenet(AS3549) at AADS 2.07 (300 ann, 145 entries)
17. Iconnet(AS3951) at AADS 2.06 (361 ann, 175 entries)
18. Above(AS6461) at AADS 2.04 (613 ann, 301 entries)
19. AT&T(AS6478) at AADS 2.02 (7636 ann, 3788 entries)
20. CAIS(AS3491) at AADS 1.95 (1688 ann, 865 entries)

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

1. SPRINT (1239) at mae-east 3934
2. internetMCI (3561) at aads 727
3. BBNplanet (1) at mae-west 467
4. Digex (2548) at mae-west 379
5. AGIS (4200) at mae-east 363
6. Grid (6113) at pb 348
7. IBMGlobal (2685) at mae-west 329
8. AT&T (6478) at pb 269
9. INAP.net (5646) at aads 211
10. NASA (297) at mae-west 148






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