[c-nsp] Cogent IOS upgrade == BGP-3, "update malformed"

[Florian Weimer]

* Zoe O'Connell:

>> 729078: Aug 22 16:21:39 MDT: %BGP-3-NOTIFICATION: sent to neighbor A.B.C.D
>> 3/1 (update malformed) 21 bytes 31FE420C 31FE58C8 124683E8 0206CC67 00
>> 729079: Aug 22 16:21:39 MDT: BGP: A.B.C.D Bad attributes FFFF FFFF FFFF FFFF
>> FFFF FFFF FFFF FFFF 0060 0200 0000 4140 0101 0040 020C 0205 00AE 0CB9 235A
>> 2046 5BA0 4003 0426 6532 7580 0404 0000 5DE8 C008 0800 AE52 0800 AE55 FD31
>> FE42 0C31 FE58 C812 4683 E802 06CC 6700 0000 0002 1854 1608 1854 1609

5BA0 suggests its related to 32 bit ASNs.  We've got the prefixes in
our table, apparently with a proper 32-bit ASN:

Paths: (1 available, best #1, table Default-IP-Routing-Table)
  Not advertised to any peer
  41698 3320 1299 8262 196930
    193.227.124.197 from 193.227.124.197 (193.227.124.128)
      Origin IGP, localpref 100, valid, external, best
      Community: 3320:1276 3320:2010 3320:9020
      Last update: Thu Aug 19 19:30:07 2010

BGP routing table entry for 84.22.9.0/24
Paths: (1 available, best #1, table Default-IP-Routing-Table)
  Not advertised to any peer
  41698 3320 1299 8262 196930
    193.227.124.197 from 193.227.124.197 (193.227.124.128)
      Origin IGP, localpref 100, valid, external, best
      Community: 3320:1276 3320:2010 3320:9020
      Last update: Thu Aug 19 19:30:07 2010

-- 
Florian Weimer                <fweimer at bfk.de>
BFK edv-consulting GmbH       http://www.bfk.de/
Kriegsstraße 100              tel: +49-721-96201-1
D-76133 Karlsruhe             fax: +49-721-96201-99