[quagga-dev 3517] Re: Quagga and long AS prefixes?

Jeroen Massar jeroen at unfix.org
Fri Jun 17 16:33:33 BST 2005


On Fri, 2005-06-17 at 13:45 +0100, Paul Jakma wrote:
> On Wed, 15 Jun 2005, Christian Hammers wrote:
> 
> > Hi
> >
> > This is just FYI that RIPE announced to do some buffer overflow 
> > tests (*eg*) tomorrow.
> 
> They're not doing buffer overflow testing, they're probing for BGP 
> topology information i think.

In a completely silly way and with different ASN's in the AS set than
what they announced, they said only 12654, but used 1221 in the set.
It looked like:

84.205.73.0/24 12654 12654 
{1221,1221,1221,1221,1221,1221,1221,1221,1221,1221,
 1221,1221,1221,1221,1221,1221,1221,1221,1221,1221,
 1221,1221,1221,1221,1221,1221,1221,1221,1221,1221,
 1221,1221,1221,1221,1221,1221,1221,1221,1221,1221,
 1221,1221,1221,1221,1221,1221,1221,1221,1221,1221,
 1221,1221,1221,1221,1221,1221,1221,1221,1221,1221,
 1221,1221,1221,1221,1221,1221,1221,1221,1221,1221,
 1221,1221,1221,1221,1221}

Only 2+65=67 long and basically as origin.

> (though, the risk of sending very very long AS-Path attrs is buffer 
> overflows in buggy implementations).

read: implementations by Vendor C :)

> > For unknown reasons they did not include Quagga in the list of 
> > pretested routers so I hope there will be no problems :-)
> 
> Iirc, Jeroen Massar has already confirmed Quagga handles 
> many-many-segment AS-Path's pn NANOG. (/iirc/).

Oh don't worry about Quagga, that won't fall on it's face :)

GRH once had a 160 long AS path for a couple of hours from multiple
viewpoints and that thing still runs.

Greets,
 Jeroen

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