09/28/97 Internet Routing Problems

From: stats@merit.edu
Date: Mon Sep 29 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
---------------------------------------
140.174.166.88/30 at Mae-West from Best (AS3915) ASPATH=3915 IGP
140.174.166.92/30 at Mae-West from Best (AS3915) ASPATH=3915 IGP
140.174.166.96/30 at Mae-West from Best (AS3915) ASPATH=3915 IGP
192.116.206.112/28 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.206.128/27 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.206.192/27 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.206.80/28 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.206.96/28 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.207.0/27 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.207.48/28 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.207.64/28 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.213.48/28 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.226.64/27 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
192.116.226.96/27 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
193.189.241.0/27 at PacBell from ANS (AS1673) ASPATH=1673 1667 6805 Incomplete
198.60.153.49/32 at Mae-East from GoodNet (AS5696) ASPATH=5696 Incomplete
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

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. idc (AS4694) at Mae-West 16 + 145867 = 145883 BGP prefix updates
2. internetMCI (AS3561) at AADS 22291 + 63849 = 86140 BGP prefix updates
3. Grid (AS6113) at Mae-East 1153 + 83476 = 84629 BGP prefix updates
4. Grid (AS6113) at PacBell 382 + 78163 = 78545 BGP prefix updates
5. Grid (AS6113) at Mae-West 382 + 78163 = 78545 BGP prefix updates
6. USCyber (AS4136) at Mae-East 1 + 77275 = 77276 BGP prefix updates
7. GetNet (AS5784) at Mae-East 0 + 70732 = 70732 BGP prefix updates
8. NetKonect (AS6716) at Mae-East 1 + 68891 = 68892 BGP prefix updates
9. DISA (AS568) at Mae-West 3602 + 59755 = 63357 BGP prefix updates
10. SPRINT (AS1239) at Mae-East 44416 + 16756 = 61172 BGP prefix updates

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

1. Priori(AS10303) at Mae-West 8.00 (8 ann, 1 entries)
2. NetAxs(AS4969) at Mae-East 7.31 (519 ann, 71 entries)
3. DREN(AS668) at Mae-West 5.84 (1291 ann, 221 entries)
4. AGIS(AS4200) at Mae-East 5.77 (9260 ann, 1604 entries)
5. Priori(AS10303) at Mae-East 5.00 (5 ann, 1 entries)
6. GEOnet(AS3356) at PacBell 4.66 (410 ann, 88 entries)
7. DREN(AS668) at Mae-East 4.53 (964 ann, 213 entries)
8. Best(AS3915) at Mae-West 4.36 (375 ann, 86 entries)
9. Advantis(AS2685) at AADS 4.30 (1166 ann, 271 entries)
10. Nacamar(AS3257) at Mae-West 4.29 (176 ann, 41 entries)
11. DISA(AS568) at Mae-West 4.16 (3602 ann, 865 entries)
12. Nacamar(AS3257) at Mae-East 3.83 (176 ann, 46 entries)
13. Advantis(AS2685) at Mae-West 3.54 (1225 ann, 346 entries)
14. AT&T(AS6478) at AADS 3.32 (4429 ann, 1335 entries)
15. MIBX(AS6218) at PacBell 3.21 (45 ann, 14 entries)
16. Advantis(AS2685) at Mae-East 2.80 (970 ann, 346 entries)
17. AT&T(AS6478) at PacBell 2.79 (3731 ann, 1335 entries)
18. AT&T(AS6478) at Mae-East 2.67 (3565 ann, 1334 entries)
19. GoodNet(AS5696) at Mae-East 2.51 (1043 ann, 416 entries)
20. u-net(AS5669) at Mae-West 2.50 (20 ann, 8 entries)

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

1. SPRINT (1239) at mae-east 3569
2. internetMCI (3561) at aads 559
3. AGIS (4200) at mae-east 459
4. BBNplanet (1) at mae-west 429
5. Grid (6113) at mae-east 223
6. AT&T (6478) at pb 205
7. CWIX (5683) at mae-west 161
8. Digex (2548) at mae-west 141
9. CAIS (3491) at aads 124
10. (0) at aads 115






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