03/27/98 Internet Routing Problems

From: stats@merit.edu
Date: Sat Mar 28 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
---------------------------------------
166.48.34.12/30 at AADS from Merit (AS237) ASPATH=237 INCOMPLETE
195.14.168.72/30 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 8516 8486 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
195.6.71.0/27 at PacBell 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
195.6.71.128/27 at PacBell 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
195.6.71.160/27 at PacBell 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
195.6.71.192/27 at PacBell 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
195.6.71.224/27 at PacBell 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
195.6.71.32/27 at PacBell 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
195.6.71.64/27 at PacBell 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
195.6.71.96/27 at PacBell 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
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
202.163.0.224/28 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 7589 IGP
202.163.0.52/30 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 7589 INCOMPLETE
202.163.4.0/28 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 7589 INCOMPLETE
202.163.4.16/28 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1299 7589 INCOMPLETE
206.84.149.20/32 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
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
209.88.15.0/27 at Mae-East from AGIS (AS4200) ASPATH=4200 6371 7997 INCOMPLETE
24.0.4.79/32 at Mae-East from Home (AS6172) ASPATH=6172 IGP
24.0.4.79/32 at Mae-West from Home (AS6172) ASPATH=6172 IGP
24.0.4.79/32 at PacBell from GEOnet (AS3356) ASPATH=3356 6172 IGP

Reserved AS Numbers
-------------------
AS65350 at Mae-West from OurWorld (AS7594) ASPATH=7594 10303 701 3561 1221 7469 7706 65350 7702 IGP

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

1. SPRINT (AS1239) at Mae-East 173157 + 44000 = 217157 BGP prefix updates
2. internetMCI (AS3561) at PacBell 67618 + 18912 = 86530 BGP prefix updates
3. internetMCI (AS3561) at AADS 47012 + 17171 = 64183 BGP prefix updates
4. internetMCI (AS3561) at Mae-East 40763 + 14956 = 55719 BGP prefix updates
5. Home (AS6172) at Mae-West 86 + 49641 = 49727 BGP prefix updates
6. Home (AS6172) at Mae-East 86 + 49527 = 49613 BGP prefix updates
7. Home (AS6172) at Paix 70 + 49517 = 49587 BGP prefix updates
8. MainStreet (AS3720) at Mae-West 6 + 36413 = 36419 BGP prefix updates
9. AGIS (AS4200) at Mae-East 27732 + 2865 = 30597 BGP prefix updates
10. Digex (AS2548) at Mae-West 8059 + 7195 = 15254 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 39.25 (157 ann, 4 entries)
2. AIMnet(AS3763) at Mae-West 25.62 (1332 ann, 52 entries)
3. IPF(AS5409) at Mae-East 19.96 (499 ann, 25 entries)
4. AGIS(AS4200) at Mae-East 14.48 (27732 ann, 1915 entries)
5. IOS(AS5000) at Mae-West 13.30 (306 ann, 23 entries)
6. highway1(AS7922) at Mae-West 13.25 (106 ann, 8 entries)
7. IBMGlobal(AS2685) at AADS 13.08 (2159 ann, 165 entries)
8. IOS(AS5000) at Mae-East 12.91 (297 ann, 23 entries)
9. highway1(AS7922) at Mae-East 11.88 (95 ann, 8 entries)
10. Xara(AS5413) at Mae-East 11.44 (675 ann, 59 entries)
11. Digex(AS2548) at Mae-East 9.45 (8954 ann, 948 entries)
12. Digex(AS2548) at Mae-West 8.48 (8059 ann, 950 entries)
13. SPRINT(AS1239) at Mae-East 8.12 (173157 ann, 21337 entries)
14. IOS(AS5000) at AADS 7.50 (210 ann, 28 entries)
15. INS(AS6660) at Mae-East 6.37 (376 ann, 59 entries)
16. Interpath(AS3407) at Mae-East 6.37 (191 ann, 30 entries)
17. Nacamar(AS3257) at Mae-East 5.74 (436 ann, 76 entries)
18. conxion(AS4544) at AADS 5.33 (16 ann, 3 entries)
19. DISC(AS7170) at Mae-East 5.28 (776 ann, 147 entries)
20. NetAxs(AS4969) at Mae-East 5.27 (1054 ann, 200 entries)

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

1. SPRINT (1239) at mae-east 4116
2. internetMCI (3561) at pb 820
3. BBNplanet (1) at mae-west 427
4. AGIS (4200) at mae-east 367
5. Grid (6113) at pb 306
6. IBMGlobal (2685) at mae-west 262
7. Digex (2548) at mae-west 219
8. AT&T (6478) at pb 187
9. NASA (297) at mae-west 152
10. CAIS (3491) at aads 140






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