04/18/98 Internet Routing Problems

From: stats@merit.edu
Date: Sun Apr 19 1998 - 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
---------------------------------------
192.17.238.128/27 at AADS from UIUC (AS38) ASPATH=38 IGP
193.234.249.64/27 at Mae-East from AGIS (AS4200) ASPATH=4200 1833 1833 1299 3301 INCOMPLETE
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
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
24.0.4.128/32 at Mae-East from Home (AS6172) ASPATH=6172 IGP
24.0.4.128/32 at Mae-West from Home (AS6172) ASPATH=6172 IGP

Reserved AS Numbers
-------------------
AS65000 at Mae-East from internetMCI (AS3561) ASPATH=3561 4230 65000 IGP

AS65000 at AADS from internetMCI (AS3561) ASPATH=3561 4230 65000 IGP

AS65000 at PacBell from internetMCI (AS3561) ASPATH=3561 4230 65000 IGP

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

1. SPRINT (AS1239) at Mae-East 64809 + 17261 = 82070 BGP prefix updates
2. Nacamar (AS3257) at Mae-West 31481 + 31419 = 62900 BGP prefix updates
3. LinkAGE (AS4058) at Mae-East 30 + 50413 = 50443 BGP prefix updates
4. AT&T (AS6478) at AADS 32554 + 2495 = 35049 BGP prefix updates
5. internetMCI (AS3561) at PacBell 24768 + 9775 = 34543 BGP prefix updates
6. internetMCI (AS3561) at AADS 22423 + 10791 = 33214 BGP prefix updates
7. internetMCI (AS3561) at Mae-East 23061 + 10126 = 33187 BGP prefix updates
8. Nacamar (AS3257) at Mae-East 12481 + 12371 = 24852 BGP prefix updates
9. AT&T (AS6478) at PacBell 19007 + 2440 = 21447 BGP prefix updates
10. MainStreet (AS3720) at Mae-West 2 + 17403 = 17405 BGP prefix updates

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

1. SPRINT (1239) at mae-east 5102
2. internetMCI (3561) at pb 2321
3. ANS (1673) at pb 949
4. BBNplanet (1) at mae-west 755
5. AGIS (4200) at mae-east 546
6. AT&T (6478) at aads 500
7. Digex (2548) at mae-west 441
8. Grid (6113) at pb 342
9. IBMGlobal (2685) at mae-west 330
10. EUnet (286) at mae-east 306






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