04/16/98 Internet Routing Problems

From: stats@merit.edu
Date: Fri Apr 17 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.
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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 SPRINT (AS1239) ASPATH=1239 4003 6619 INCOMPLETE
193.234.249.64/27 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1833 1299 3301 INCOMPLETE
198.80.116.192/27 at PacBell from ANS (AS1673) ASPATH=1673 1670 IGP
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
206.185.236.4/30 at Mae-East from AGIS (AS4200) ASPATH=4200 IGP
206.84.149.20/32 at Mae-East from AGIS (AS4200) ASPATH=4200 IGP
207.26.64.80/28 at PacBell from ANS (AS1673) ASPATH=1673 1675 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
209.88.14.64/28 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

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 85823 + 29188 = 115011 BGP prefix updates
2. Nacamar (AS3257) at Mae-West 32180 + 32069 = 64249 BGP prefix updates
3. internetMCI (AS3561) at Mae-East 50187 + 12472 = 62659 BGP prefix updates
4. NASA (AS297) at Mae-East 1273 + 50622 = 51895 BGP prefix updates
5. internetMCI (AS3561) at PacBell 37579 + 12608 = 50187 BGP prefix updates
6. internetMCI (AS3561) at AADS 29198 + 12928 = 42126 BGP prefix updates
7. AGIS (AS4200) at Mae-East 31332 + 2022 = 33354 BGP prefix updates
8. MainStreet (AS3720) at Mae-West 8 + 26636 = 26644 BGP prefix updates
9. Digex (AS2548) at Mae-East 10534 + 3800 = 14334 BGP prefix updates
10. AT&T (AS6478) at Mae-West 11355 + 1644 = 12999 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 843.15 (10961 ann, 13 entries)
2. AT&T(AS6478) at AADS 20.08 (76025 ann, 3787 entries)
3. AIMnet(AS3763) at Mae-West 8.35 (434 ann, 52 entries)
4. highway1(AS7922) at Mae-West 5.00 (45 ann, 9 entries)
5. DREN(AS668) at Mae-West 4.48 (1106 ann, 247 entries)
6. VBC(AS6320) at Mae-West 3.81 (80 ann, 21 entries)
7. AT&T(AS6478) at Mae-West 3.77 (14197 ann, 3770 entries)
8. ANS(AS1673) at Mae-West 2.36 (3800 ann, 1608 entries)
9. InterAccess(AS3789) at AADS 2.32 (65 ann, 28 entries)
10. WCG(AS7911) at AADS 2.00 (4 ann, 2 entries)
11. Home(AS6172) at Mae-West 1.39 (93 ann, 67 entries)
12. Priori(AS10303) at Mae-West 1.29 (44 ann, 34 entries)
13. Digex(AS2548) at Mae-West 1.19 (1272 ann, 1073 entries)
14. Home(AS6172) at Paix 1.10 (74 ann, 67 entries)
15. OurWorld(AS7594) at Mae-West 1.05 (184 ann, 176 entries)
16. unlisys(AS8218) at Mae-West 0.97 (63 ann, 65 entries)
17. internetMCI(AS3561) at AADS 0.97 (17098 ann, 17656 entries)
18. NASA(AS297) at Mae-West 0.82 (705 ann, 864 entries)
19. CAIS(AS3491) at AADS 0.80 (687 ann, 861 entries)
20. CAIS(AS3491) at Mae-West 0.79 (681 ann, 862 entries)

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

1. SPRINT (1239) at mae-east 4640
2. internetMCI (3561) at pb 2367
3. ANS (1673) at mae-west 830
4. BBNplanet (1) at mae-west 773
5. AGIS (4200) at mae-east 614
6. EUnet (286) at mae-east 550
7. AT&T (6478) at aads 480
8. Digex (2548) at mae-west 438
9. Grid (6113) at pb 357
10. IBMGlobal (2685) at mae-west 353






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