[Irtf-rr] IP Table Size

[Poh Tze Ven]

Hello,

> It would help if your categorization made more sense.  With a few
> hundred thousand routes, why exclude the few hundred (at most) ASBR?

The size of IP table from ASBR can be very different from an internal router. I
only need data from internal routers, and do not wish the information from ASBR
to bias it.

> Unless you mean exclude the ASE routes and count the intra-area and
> inter-area routes.

No, I try to study the ASE routes visible to internal routers.

> The routing information base (RIB) is what really
> matters, not the FIB, unless you are trying to build hardware and
> looking for what the ASIC FIB sizes should be.

I think I have made myself clear, I need FIB not RIB. Your last point is close
to what I am interested in (but not designing ASIC of that sort). Anyway if you
study ASBR carefully (which certainly you do), most of them use more than 95% of
RIB for FIB.

> If you are interested
> in the IGP size you need to know number of nodes (routers in an OSPF
> area, IS in an ISIS level) and adjacencies, which is relevant if your
> interest is computational scaling.  It might help to first learn the
> terminology and get a clue as to what questions make sense to ask
> before asking.

I know what I am asking for. Thanks. The IGP size is not all that important, I
only want to do some rough correlation with the table size.

> You might also have more success looking at the various sites that
> provide full routing information and counting the routes yourself.
> You won't find the number of unaggregated routes inside any given ISP,
> just the global routing information.

I do not need the details and I am aware of the availability of such ASBR
routing information but that is not I am after. I need internal router routing
information and that cannot be found in the Net.

> You also won't find the number
> of nodes and adjacencies if that is what you are after.

No

> Last I heard it was around 250,000 routes for the largest ISPs with
> some routers having 1,000,000 route instances (more than one way to
> get there from here).  Its a moving target.  You can find number of
> routers and a rough idea of out degree (leading to number of links)
> from some past presentations at NANOG or elsewhere.

Again I am not seeking for such info. The reason for (iii) is that if given (ii)
I would like to correlate it with (iii)

My requirements are nothing as complicated as what you have thought.

cheers!