So, is it getting worse?
Over the past few posts (the good and the bad), I have considered the various causes for a non-optimal Internet Routing Table. And now on to the question of whether it is getting worse.
Enterprise deaggregation (click for full size)
The graph above (source) shows the deaggregation by Enterprise ASes. Enterprises represent the vast majority of the edge of the Internet. As such, they are by far the largest source of deaggregation. According to this, the level of deaggregation has not increased significantly.
However, the following graph (source) shows a significant increase in the deaggregation factor.
- Deaggregation by RIR
(click for full size)
The discrepancy appears to be as a result of definition. The 1st graph is based on allocations (maximum aggregation is bound by RIR allocation size) , while the second is based on best-case aggregation (idealised aggregation to maximum possible per AS). These are very different. It is therefore getting worse and has increased from 1.27 in 1999 to 2.18 today. This represents an increase of over 70% in deaggregation.
What solutions are there. Well – a whole whack have been developed. However, how many are viable? This humorous post actually captures a stack of the issues.
Further Reading
BGP Aggregation & The Deaggregation Report
Evolution of Internet Address Space Deaggregation: Myths and Reality
Statistics
This is part of a series of posts – The Lisp Papers.
