05/27/98 Internet Routing Problems

From: stats@merit.edu
Date: Thu May 28 1998 - 10:00:04 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
---------------------------------------
165.212.200.16/28 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 2941 INCOMPLETE
165.212.200.16/28 at Mae-East from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
165.212.200.16/28 at Mae-West from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
165.212.200.80/28 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 2941 INCOMPLETE
165.212.200.80/28 at Mae-East from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
165.212.200.80/28 at Mae-West from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
165.212.43.0/28 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 2941 INCOMPLETE
165.212.43.0/28 at Mae-East from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
165.212.43.0/28 at Mae-West from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
165.212.43.16/28 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 2941 INCOMPLETE
165.212.43.16/28 at Mae-East from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
165.212.43.16/28 at Mae-West from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
165.212.43.32/28 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 2941 INCOMPLETE
165.212.43.32/28 at Mae-East from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
165.212.43.32/28 at Mae-West from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
165.212.43.48/28 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 2941 INCOMPLETE
165.212.43.48/28 at Mae-East from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
165.212.43.48/28 at Mae-West from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
193.234.249.64/27 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1833 1299 3301 INCOMPLETE
194.117.170.240/28 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1833 1299 3301 INCOMPLETE
194.68.51.224/28 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1833 1299 3301 INCOMPLETE
195.12.164.128/28 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 8516 INCOMPLETE
195.12.164.144/28 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 8516 INCOMPLETE
195.12.164.160/27 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 8516 INCOMPLETE
195.12.164.192/27 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 8516 INCOMPLETE
195.12.164.224/28 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 8516 INCOMPLETE
195.12.164.248/29 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 8516 INCOMPLETE
195.196.29.0/27 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1833 1299 3301 INCOMPLETE
195.196.29.48/28 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1833 1299 3301 INCOMPLETE
195.196.37.0/27 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1833 1299 3301 INCOMPLETE
195.196.37.64/27 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1833 1299 3301 INCOMPLETE
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
205.214.79.16/28 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 2941 INCOMPLETE
205.214.79.16/28 at Mae-East from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
205.214.79.16/28 at Mae-West from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
205.214.79.48/28 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 2941 INCOMPLETE
205.214.79.48/28 at Mae-East from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
205.214.79.48/28 at Mae-West from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
205.214.88.16/28 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 2941 INCOMPLETE
205.214.88.16/28 at Mae-East from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
205.214.88.16/28 at Mae-West from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
205.214.94.32/27 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 2941 INCOMPLETE
205.214.94.32/27 at Mae-East from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
205.214.94.32/27 at Mae-West from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
205.214.94.64/27 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 2941 INCOMPLETE
205.214.94.64/27 at Mae-East from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
205.214.94.64/27 at Mae-West from ACSI (AS6467) ASPATH=6467 2941 INCOMPLETE
206.185.10.249/32 at Mae-East from AGIS (AS4200) ASPATH=4200 IGP
206.84.149.20/32 at Mae-East from AGIS (AS4200) ASPATH=4200 IGP
206.84.149.30/32 at Mae-East from AGIS (AS4200) ASPATH=4200 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
207.26.64.80/28 at PacBell from ANS (AS1673) ASPATH=1673 1675 IGP

Reserved AS Numbers
-------------------
AS65000 at Mae-East from internetMCI (AS3561) ASPATH=3561 4230 65000 IGP

AS65515 at Mae-East from SPRINT (AS1239) ASPATH=1239 6453 6846 5415 5593 65515 8207 INCOMPLETE

AS65534 at Mae-East from ANS (AS1673) ASPATH=1673 1324 65534 IGP

AS65534 at Mae-West from ANS (AS1673) ASPATH=1673 1324 65534 IGP

AS65534 at PacBell from ANS (AS1673) ASPATH=1673 1324 65534 IGP

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

1. SPRINT (AS1239) at Mae-East 54218 + 16970 = 71188 BGP prefix updates
2. internetMCI (AS3561) at Mae-East 47881 + 12255 = 60136 BGP prefix updates
3. LinkAGE (AS4058) at Mae-West 134 + 50314 = 50448 BGP prefix updates
4. internetMCI (AS3561) at AADS 31988 + 10860 = 42848 BGP prefix updates
5. internetMCI (AS3561) at PacBell 30776 + 10951 = 41727 BGP prefix updates
6. MainStreet (AS3720) at Mae-West 19 + 37889 = 37908 BGP prefix updates
7. AGIS (AS4200) at Mae-East 31013 + 5621 = 36634 BGP prefix updates
8. BBNplanet (AS1) at Mae-East 13684 + 3721 = 17405 BGP prefix updates
9. ANS (AS1673) at Mae-East 9771 + 1470 = 11241 BGP prefix updates
10. AT&T (AS7018) at Mae-West 7326 + 3161 = 10487 BGP prefix updates

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

1. OurWorld(AS7594) at Mae-West 14.58 (3470 ann, 238 entries)
2. u-net(AS5669) at Mae-West 9.67 (87 ann, 9 entries)
3. VisiNet(AS6261) at Mae-East 9.41 (2165 ann, 230 entries)
4. DRA(AS1746) at Mae-West 9.21 (129 ann, 14 entries)
5. VisiNet(AS6261) at Mae-West 7.89 (1799 ann, 228 entries)
6. AIMnet(AS3763) at Mae-West 7.55 (400 ann, 53 entries)
7. AT&T(AS7018) at AADS 7.00 (22299 ann, 3184 entries)
8. AT&T(AS7018) at Mae-West 6.75 (21586 ann, 3200 entries)
9. AT&T(AS7018) at Mae-East 6.28 (19987 ann, 3183 entries)
10. AT&T(AS7018) at PacBell 6.28 (19982 ann, 3183 entries)
11. ESnet(AS293) at Mae-West 4.86 (588 ann, 121 entries)
12. ESnet(AS293) at Mae-East 4.61 (558 ann, 121 entries)
13. ESnet(AS293) at AADS 4.60 (556 ann, 121 entries)
14. GEOnet(AS3356) at PacBell 4.37 (398 ann, 91 entries)
15. OurWorld(AS7594) at Paix 4.02 (948 ann, 236 entries)
16. ThePlanet(AS5388) at Mae-West 3.87 (329 ann, 85 entries)
17. DRA(AS1746) at Mae-East 3.36 (47 ann, 14 entries)
18. DRA(AS1746) at AADS 3.07 (43 ann, 14 entries)
19. BBNplanet(AS1) at Mae-West 2.65 (14632 ann, 5518 entries)
20. BBNplanet(AS1) at Mae-East 2.62 (14447 ann, 5513 entries)

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

1. SPRINT (1239) at mae-east 4062
2. internetMCI (3561) at pb 774
3. BBNplanet (1) at mae-west 483
4. AGIS (4200) at mae-east 426
5. Digex (2548) at mae-west 359
6. IBMGlobal (2685) at mae-west 343
7. AT&T (7018) at aads 258
8. INAP.net (5646) at aads 206
9. DREN (668) at mae-east 168
10. Grid (6113) at pb 166






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