Tier-2 reachability and multihoming

Thu Mar 24 05:06:04 UTC 2005

On Wed, 23 Mar 2005, Michael Loftis wrote:
>
> I think that likely you're looking at partial data (well i am sure you are, 
> since i'm part of the internet and you didn't' get routing data from me...)

Duh !
> and not seeing paths because of that.  The BGP tables of a single node list 
> all outward paths to other places.  Thus from a single sample point it is 
> totally impossible to 'map' the internet.
>
> Not to mention the *constant* change in routing.

Actually, I am not doing what you think I am. I am using the RouteViews 
aggregation of the BGP routing tables. RouteViews is a project at the 
univ. of Oregon that peers with backbones and other ASes at interesting 
locations so as to make it as comprehensive as possible. Also, it updates 
the data every 2 hours of everyday. So, I am looking at almost full and 
fresh data :>