Aggregation & path information [was: 200K prefixes - Weekly Routing Table Report]

Paul Vixie vixie at
Sat Oct 14 15:09:56 UTC 2006

patrick at ("Patrick W. Gilmore") writes:

> Obviously the table contains kruft.  But I know we could not shrink  
> it to 109K prefixes without losing something from where I sit.  Are  
> you sure there's no additional path info?

before we could be sure that an aggregation proposal was nondestructive,
we'd have to model it from where a lot of people sit, not just patrick.

on the one hand this seems to be a useful endeavour.  in addition to
measuring the total number of routes, we probably ought to measure the
number of non-TE-related routes, and focus our attention on those routes
and also the ratio ("global TE cost borne by the routing system.")

on the other hand i dispair of finding a set of observation posts and
metrics that will abstract TE out of the observed routes in a way that
wouldn't be seen as controversial or useless by most of the community.
ISC Training!  October 16-20, 2006, in the San Francisco Bay Area,
covering topics from DNS to DHCP.  Email training at
Paul Vixie

More information about the NANOG mailing list