[rrg] Fundamental objections toahost-basedscalableroutingsolution

[Lan Wang]

On Dec 8, 2008, at 4:03 PM, Scott Brim wrote:

> Excerpts from Michael Meisel on Sun, Nov 30, 2008 03:33:53PM -0800:
>> Hi everyone, one of the APT people here. =) So we actually did an
>> analysis of potential default mapper load a while back, based on real
>> traffic traces at two POPs that serves mostly academic networks,  
>> taking
>> into account the RTT to the default mapper and the cache size and
>> expiration time. Even in the worst case, the results show that the  
>> load
>> on the default mappers is pretty small.
>
> I would be concerned about bogons.  I'm told that there are millions
> of crap packets that currently get thrown away at site borders.  I
> don't know how many of your campus machines are owned bots, but almost
> 15% of the hosts on the Internet are.  Did you see any of that?

The traffic traces we use have been anonymized (so we don't know the  
actual destinations).   If there are lots of bogus destinations (from  
the crap packets), they will create more mapping entries at the ITR  
than necessary and probably increase the load at the default  
mappers.  In the worst case, this is similar to a cache overflow  
attack.  There have been proposed counter-measures for that kind of  
attacks (see the paper ""Pollution Attacks and Defenses for Internet  
Caching Systems", L. Deng, Y. Gao, Y. Chen, and A. Kuzmanovic, http:// 
networks.cs.northwestern.edu/publications/cache_JCN.pdf).

Lan
>
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