On Mar 14, 2010, at 3:38 PM, heinerhum...@aol.com wrote:
In einer eMail vom 14.03.2010 21:33:59 Westeuropäische Normalzeit
schreibt amu...@simula.no:
- After filtering out duplicates, local effects and anomalies caused
by
a few specific events, we find that there is an increasing trend in
"baseline" churn over the past six years, but that this growth is
quite
modest, and much slower than the growth in the DFZ RIB size.
I did comment on the RIB size, explained my point, by some
chessboard example how bad the basic concept (DV) is. I learnt what
LISP is doing to improve the situation: LISP is eliminating an
additional factor I haven't even considered in the first place when
I came up with these horribly high numbers of routes.
So my question is, why is this group so much convinced of collecting
routes rather than of collecting topological links ??? This is the
#1 question and much more important than the CES versus CEE issue.
Heiner,
1/ I am not quite clear why collecting topological links is the #1
question for RRG/routing scalability solution development
2/ my group has been collecting Internet AS level topology for the
last 5 years.
the following one is the most recent paper:
The (in)Completeness of the Observed Internet AS-level Structure
IEEE/ACM Transactions on Networking, Feb 2010.
although the paper just got published, some of the numbers may have
already changed in reality. However one fact should remain true: by
putting BGP data from all the sources we can get our hand on, the
collected results still miss majority of the peering links between ASes.
Particularly when there are so many and so major technological
additional advantages in case BGP provided topological information.
And the hereby needed "update churn" is such minor, that it could be
afforded as even some additional solution in parallel.
I have been watching this discussion for about six or seven years,
at least since the Prague meeting.
I have expressed several times that it may take patience and I do
know that all other DV-based solutions will be prioritized first.
But how many more years does this group want to go on in this way?
It seems to be easier to show that p equals np than to convince this
group about the most obvious routing facts.
Really, this #1 question deserves a severe discussion.
Heiner
Lixia
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