11/24/97 Internet Routing Problems

From: stats@merit.edu
Date: Tue Nov 25 1997 - 10:00:02 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
---------------------------------------
192.116.222.0/27 at Mae-East from AGIS (AS4200) ASPATH=4200 5486 Incomplete
194.207.0.128/28 at Mae-West from VBC (AS6320) ASPATH=6320 IGP
206.80.170.204/30 at Mae-East from Grid (AS6113) ASPATH=6113 IGP
206.80.170.204/30 at Mae-West from Grid (AS6113) ASPATH=6113 IGP

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

1. SPRINT (AS1239) at Mae-East 490965 + 116247 = 607212 BGP prefix updates
2. idc (AS4694) at Mae-West 197 + 252819 = 253016 BGP prefix updates
3. GetNet (AS5784) at Mae-East 10 + 212870 = 212880 BGP prefix updates
4. NetKonect (AS6716) at Mae-East 0 + 190886 = 190886 BGP prefix updates
5. CompuServe (AS4183) at Mae-East 2 + 169021 = 169023 BGP prefix updates
6. USCyber (AS4136) at Mae-East 0 + 150625 = 150625 BGP prefix updates
7. Interpath (AS3407) at Mae-East 66 + 114417 = 114483 BGP prefix updates
8. internetMCI (AS3561) at Mae-East 57713 + 18204 = 75917 BGP prefix updates
9. internetMCI (AS3561) at AADS 39221 + 17010 = 56231 BGP prefix updates
10. CAIS (AS3491) at Mae-West 32284 + 10975 = 43259 BGP prefix updates

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

1. NetAxs(AS4969) at Mae-East 78.63 (4639 ann, 59 entries)
2. CAIS(AS3491) at Mae-West 46.86 (32284 ann, 689 entries)
3. SPRINT(AS1239) at Mae-East 24.17 (490965 ann, 20312 entries)
4. HLC(AS4565) at Mae-West 13.63 (927 ann, 68 entries)
5. HLC(AS4565) at AADS 13.27 (889 ann, 67 entries)
6. Voicenet(AS3932) at Mae-East 13.15 (697 ann, 53 entries)
7. VBC(AS6320) at Mae-West 12.00 (156 ann, 13 entries)
8. HLC(AS4565) at Mae-East 11.61 (778 ann, 67 entries)
9. EUnet(AS286) at Mae-East 10.22 (11523 ann, 1128 entries)
10. Cableol(AS5089) at Mae-East 9.75 (39 ann, 4 entries)
11. IBMGlobal(AS2685) at Mae-West 8.70 (5575 ann, 641 entries)
12. CWIX(AS5683) at Mae-West 7.99 (10241 ann, 1282 entries)
13. IBMGlobal(AS2685) at Mae-East 6.86 (4395 ann, 641 entries)
14. IBMGlobal(AS2685) at AADS 6.50 (4166 ann, 641 entries)
15. CWIX(AS5683) at Mae-West 6.00 (7694 ann, 1282 entries)
16. WebSecure(AS6583) at Mae-West 6.00 (12 ann, 2 entries)
17. WebSecure(AS6583) at AADS 6.00 (12 ann, 2 entries)
18. WebSecure(AS6583) at Mae-East 5.50 (11 ann, 2 entries)
19. LinkAGE(AS4058) at Mae-East 5.47 (104 ann, 19 entries)
20. DISA(AS568) at Mae-West 5.31 (2975 ann, 560 entries)

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

1. SPRINT (1239) at mae-east 3599
2. internetMCI (3561) at aads 741
3. BBNplanet (1) at mae-west 406
4. AGIS (4200) at mae-east 281
5. AT&T (6478) at aads 225
6. IBMGlobal (2685) at mae-west 187
7. Grid (6113) at pb 172
8. CWIX (5683) at mae-west 164
9. Digex (2548) at mae-west 150
10. INAP.net (5646) at mae-west 146






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