BGP Traffic Flood

Nick nick at somerandomnick.ano.mailgate.vanet.org
Fri Mar 11 01:28:55 CET 2011


I upgraded a node from 1.2.3 to git, and now my node makes a flood of
outgoing BGP traffic.  The traffic consists in messages that repeat the
same updates for a few routes.  Here is one example (from tcpdump).

        Update Message (2), length: 63
          Origin (1), length: 1, Flags [T]: IGP
            0x0000:  00
          AS Path (2), length: 22, Flags [T]: 64731 64768 64677 64602 64602
            0x0000:  0205 0000 fcdb 0000 fd00 0000 fca5 0000
            0x0010:  fc5a 0000 fc5a
          Next Hop (3), length: 4, Flags [T]: 172.22.131.253
            0x0000:  ac16 83fd
          Updated routes:
            172.22.2.0/23

This exact message repeated more than 10 times in only about 20 seconds.
There are many more messages that also repeated more than 10 times in
the same 20 seconds.

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