12/20/97 Internet Routing Problems

From: stats@merit.edu
Date: Sun Dec 21 1997 - 10:00:06 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.
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collection research efforts.

Reserved Network and Host Announcements
---------------------------------------
192.239.22.48/29 at Mae-East from BBNplanet (AS1) ASPATH=1 IGP
192.239.22.48/29 at Mae-West from BBNplanet (AS1) ASPATH=1 IGP
194.117.132.184/30 at Mae-East from CableInet (AS5462) ASPATH=5462 6676 IGP

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. CAIS (AS3491) at Mae-West 286682 + 263430 = 550112 BGP prefix updates
2. NetKonect (AS6716) at Mae-East 8 + 211559 = 211567 BGP prefix updates
3. GetNet (AS5784) at Mae-East 3 + 150103 = 150106 BGP prefix updates
4. USCyber (AS4136) at Mae-East 0 + 132768 = 132768 BGP prefix updates
5. idc (AS4694) at Mae-West 3 + 115477 = 115480 BGP prefix updates
6. SPRINT (AS1239) at Mae-East 67716 + 7684 = 75400 BGP prefix updates
7. BBNplanet (AS1) at Mae-East 31371 + 4694 = 36065 BGP prefix updates
8. CompuServe (AS4183) at Mae-East 110 + 34170 = 34280 BGP prefix updates
9. internetMCI (AS3561) at Mae-East 26562 + 4834 = 31396 BGP prefix updates
10. BBNplanet (AS1) at Mae-West 20494 + 4415 = 24909 BGP prefix updates

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

1. CAIS(AS3491) at Mae-West 226.09 (286682 ann, 1268 entries)
2. NetAxs(AS4969) at Mae-East 86.92 (8518 ann, 98 entries)
3. DISC(AS7170) at Mae-East 8.36 (1354 ann, 162 entries)
4. Cableol(AS5089) at Mae-East 8.00 (32 ann, 4 entries)
5. CableInet(AS5462) at Mae-West 7.57 (280 ann, 37 entries)
6. VisiNet(AS6261) at Mae-West 7.30 (416 ann, 57 entries)
7. VisiNet(AS6261) at Mae-East 7.14 (407 ann, 57 entries)
8. Intermedia(AS6235) at Mae-East 6.94 (1741 ann, 251 entries)
9. BBNplanet(AS1) at Mae-East 6.46 (31371 ann, 4853 entries)
10. BBNplanet(AS1) at Mae-West 4.23 (20494 ann, 4845 entries)
11. AIMnet(AS3763) at Mae-West 3.74 (176 ann, 47 entries)
12. Interpath(AS3407) at Mae-East 3.53 (113 ann, 32 entries)
13. AT&T(AS6478) at Mae-West 3.30 (6651 ann, 2014 entries)
14. SPRINT(AS1239) at Mae-East 3.20 (67716 ann, 21138 entries)
15. Internex(AS2828) at Mae-East 2.73 (164 ann, 60 entries)
16. InterAccess(AS3789) at AADS 2.73 (71 ann, 26 entries)
17. DISA(AS568) at Mae-West 2.66 (1479 ann, 557 entries)
18. ESnet(AS293) at Mae-West 2.63 (302 ann, 115 entries)
19. WNA(AS2914) at Mae-East 2.58 (2840 ann, 1101 entries)
20. Internex(AS2828) at AADS 2.54 (155 ann, 61 entries)

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

1. SPRINT (1239) at mae-east 3682
2. internetMCI (3561) at pb 728
3. BBNplanet (1) at mae-east 399
4. AGIS (4200) at mae-east 284
5. IBMGlobal (2685) at mae-east 188
6. Grid (6113) at pb 186
7. Digex (2548) at mae-west 167
8. CAIS (3491) at mae-west 166
9. AT&T (6478) at aads 161
10. INAP.net (5646) at aads 161






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