Re: DNS based Destination Selection

[Cedric de Launois <delaunois@info.ucl.ac.be>]

Le mer 18/06/2003 à 18:58, Jay Ford a écrit :
> On Wed, 18 Jun 2003, David Gethings wrote:
> > I understand that DNS based solutions to the IPv6 multihomed problem
> > have been suggested before. However I believe my suggestion is a
> > different variant to previous suggestions.
> >
> > Below is an overview of my suggestion. I believe it has merit and would
> > like the groups view.
> 
> My quick reactions:
>    o  DNS is too high a level for (srcaddr,dstaddr) selection;
>       not everything goes by name

Indeed. We thought of this mechanism in the NAROS solution. We perfomed 
recently a quick evaluation of this solution (use of DNS to influence
an external source's destination decision making). First results
clearly show this is too high level : 70 to 90% of the traffic 
flows we analyzed were NOT preceeded by a DNS request ! (This
is only an approximation since it is hard to see which DNS request
is associated with which flow). This is due to the spread of p2p
applications : lots of flows without any DNS lookup.