09/30/97 Internet Routing Problems

From: stats@merit.edu
Date: Wed Oct 01 1997 - 10:00:03 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
---------------------------------------
192.116.226.64/27 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.221.5.240/29 at Mae-East from BBNplanet (AS1) ASPATH=1 IGP
193.189.241.0/27 at Mae-East from ANS (AS1673) ASPATH=1673 1667 6805 Incomplete
193.189.241.0/27 at Mae-West from ANS (AS1673) ASPATH=1673 1667 6805 Incomplete
193.189.241.0/27 at PacBell from ANS (AS1673) ASPATH=1673 1667 6805 Incomplete
204.151.108.16/29 at Mae-West from ANS (AS1673) ASPATH=1673 1670 IGP
204.151.108.24/29 at Mae-West from ANS (AS1673) ASPATH=1673 1670 IGP
204.151.108.32/29 at Mae-West from ANS (AS1673) ASPATH=1673 1699 IGP
204.151.184.252/30 at Mae-West from ANS (AS1673) ASPATH=1673 1129 IGP
204.223.87.16/28 at Mae-West from DISA (AS568) ASPATH=568 1913 1913 1913 1913 1913 1913 1913 1913 1913 1913 1913 3542 Incomplete
204.223.87.32/28 at Mae-West from DISA (AS568) ASPATH=568 1913 1913 1913 1913 1913 1913 1913 1913 1913 1913 1913 3542 Incomplete
204.223.87.48/28 at Mae-West from DISA (AS568) ASPATH=568 1913 1913 1913 1913 1913 1913 1913 1913 1913 1913 1913 3542 Incomplete
204.223.87.64/28 at Mae-West from DISA (AS568) ASPATH=568 1913 1913 1913 1913 1913 1913 1913 1913 1913 1913 1913 3542 Incomplete
209.62.34.4/30 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 5009 Incomplete
209.62.34.4/30 at Mae-East from ACSI (AS6467) ASPATH=6467 5009 Incomplete
209.62.34.4/30 at Mae-West from ACSI (AS6467) ASPATH=6467 5009 Incomplete
209.62.34.8/30 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 5009 Incomplete
209.62.34.8/30 at Mae-East from ACSI (AS6467) ASPATH=6467 5009 Incomplete
209.62.34.8/30 at Mae-West from ACSI (AS6467) ASPATH=6467 5009 Incomplete
209.62.37.16/28 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 5009 Incomplete
209.62.37.16/28 at Mae-East from ACSI (AS6467) ASPATH=6467 5009 Incomplete
209.62.37.16/28 at Mae-West from ACSI (AS6467) ASPATH=6467 5009 Incomplete
209.62.45.253/32 at Mae-East from AGIS (AS4200) ASPATH=4200 6467 5009 Incomplete
209.62.45.253/32 at Mae-East from ACSI (AS6467) ASPATH=6467 5009 Incomplete
209.62.45.253/32 at Mae-West from ACSI (AS6467) ASPATH=6467 5009 Incomplete

Reserved AS Numbers
-------------------
AS65515 at Mae-East from Digex (AS2548) ASPATH=2548 5415 65515 8207 IGP

AS65515 at Mae-West from Digex (AS2548) ASPATH=2548 5415 65515 8207 IGP

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

1. DISA (AS568) at Mae-West 6801 + 6323316 = 6330117 BGP prefix updates
2. Grid (AS6113) at PacBell 617 + 210200 = 210817 BGP prefix updates
3. Grid (AS6113) at Mae-West 617 + 210200 = 210817 BGP prefix updates
4. Grid (AS6113) at Mae-East 869 + 203702 = 204571 BGP prefix updates
5. idc (AS4694) at Mae-West 14 + 199475 = 199489 BGP prefix updates
6. NetKonect (AS6716) at Mae-East 0 + 176741 = 176741 BGP prefix updates
7. USCyber (AS4136) at Mae-East 4 + 142535 = 142539 BGP prefix updates
8. GetNet (AS5784) at Mae-East 0 + 140507 = 140507 BGP prefix updates
9. SPRINT (AS1239) at Mae-East 94650 + 27972 = 122622 BGP prefix updates
10. internetMCI (AS3561) at AADS 71186 + 29358 = 100544 BGP prefix updates

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

1. conxion(AS4544) at Mae-West 10.33 (31 ann, 3 entries)
2. AimNet(AS3763) at PacBell 8.96 (233 ann, 26 entries)
3. AimNet(AS3763) at Mae-West 8.85 (230 ann, 26 entries)
4. Genuity(AS3847) at Paix 8.38 (6698 ann, 799 entries)
5. DISA(AS568) at Mae-West 7.68 (6801 ann, 885 entries)
6. NetAxs(AS4969) at Mae-East 7.51 (526 ann, 70 entries)
7. Servint(AS7960) at Mae-East 6.50 (13 ann, 2 entries)
8. DREN(AS668) at Mae-West 5.78 (1249 ann, 216 entries)
9. EUnet(AS286) at Mae-East 5.75 (6780 ann, 1180 entries)
10. conxion(AS4544) at AADS 5.67 (17 ann, 3 entries)
11. CableInet(AS5462) at Mae-West 5.60 (235 ann, 42 entries)
12. conxion(AS4544) at Mae-East 5.33 (16 ann, 3 entries)
13. Advantis(AS2685) at AADS 4.81 (1298 ann, 270 entries)
14. SPRINT(AS1239) at Mae-East 4.70 (94650 ann, 20158 entries)
15. AT&T(AS6478) at Mae-East 4.44 (3878 ann, 873 entries)
16. netrail(AS4006) at Mae-East 4.43 (102 ann, 23 entries)
17. internetMCI(AS3561) at AADS 4.29 (71186 ann, 16612 entries)
18. conxion(AS4544) at PacBell 4.00 (4 ann, 1 entries)
19. DREN(AS668) at Mae-East 4.00 (820 ann, 205 entries)
20. Netcom(AS2551) at Mae-East 3.66 (1238 ann, 338 entries)

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

1. SPRINT (1239) at mae-east 3593
2. internetMCI (3561) at pb 571
3. AGIS (4200) at mae-east 392
4. BBNplanet (1) at mae-west 318
5. Grid (6113) at mae-east 223
6. NASA (297) at mae-west 169
7. CWIX (5683) at mae-west 163
8. Digex (2548) at mae-east 159
9. AT&T (6478) at pb 146
10. EUnet (286) at mae-east 142






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