Re: The state of IPv6 multihoming development

[Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp>]

Iljitsch;

> > That's one of the reason why reduction of DFZ is important for
> > the high speed Internet with quick routing table look up.
> 
> The IRTF doesn't agree:
> 
> http://www.ietf.org/internet-drafts/draft-irtf-routing-reqs-groupa-00.txt
> 
> 4.1 Forwarding Table Optimization
> 
>         We believe that it is not necessary for the architecture to
>         minimize the size of the forwarding tables (FIBS).  Current
>         memory sizes, speeds, and prices, along with processor and ASIC
>         capabilities allow forwarding tables to be very large, O(E6),
>         and fast (100M lookups/second) tables to be built with little
>         difficulty.

1M entry with 100M lookup per second may be possible someday, if the
1M entry memory and core logic of routers be put into a single chip.

However, the statement is politically distorted.

The reality is that, if we don't solve multihoming issue, 1M is small.

Moverover, 100M lookups/second is slow for terabit networking.

If we use multiple chips, we must accept that inter-chip communication
has large overhead, which means it is slow and costs a lot.

High performance routing is still possible with parallelism, which
means a lot of wiring and, thus, a lot more cost.

							Masataka Ohta