Anyone else seeing "(invalid or corrupt AS path) 3 bytes E01100" ?

randal k nanog at
Mon Aug 17 16:37:07 CDT 2009

Yep, we started seeing this right around 12:20pm MST. We saw it from a
customer's rapidly-flapping BGP peer. We told them to configure bgp
maxas-limit, but apparently CRS1s don't have that command.

Anybody have a handy route-map that will deny anything with a as-path
longer than say 15-20? ;-)


On Mon, Aug 17, 2009 at 2:11 PM, Adam Hebert<a2thah at> wrote:
> Multiple providers are seeing this right now.  I assume someone is
> advertising an extremely long AS_PATH again?
> anyone else seeing this?
> Adam

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