Weekly Routing Table Report

Sat Aug 31 03:04:43 UTC 2019

Patrick W. Gilmore wrote:

> The hope is the v6 DFZ will not grow nearly as fast because of far
> less fragmentation.

As the problem is caused by multihomed sites (including ISPs), there
is no such hope.

With the current way of multihoming to compute available routes to
multihomed sites by global routing system, the load, including routing
table size, to the global routing system increases at least linearly
to the number of multihomed sites.

Some people was aware of the problem when the size was 50,000.

With the current routing practice, the number will increase to 14M
with IPv4 and a lot more than that with IPv6.

The solution is:

	https://tools.ietf.org/html/draft-ohta-e2e-multihoming-03

but IETF is working on stupid things like LISP only to increase
load to the global routing system.

> Also, even today TCAM ain’t cheap. Let’s hope it those numbers are
> not "nothing".

The problem is serious especially because Moore's law is ending.

						Masataka Ohta