IPv6 PI allocation

[Gert Doering]

Hi,

On Thu, May 17, 2007 at 08:51:32PM +0900, Jun-ichiro itojun Hagino 2.0 wrote:
> > Wrong, you people just have to please stop to spread FUD.
> > 
> > THERE IS NO ROUTING TABLE PROBLEM, FULL STOP.
> 
> 	hmm.  an important figure in the IETF (who have served as an IESG in
> 	the past) told me that router vendors are telling people rather dreamy
> 	thing - they are OK to handle 1M routing table entries with hardware
> 	forwarding.  to hold 1M routing table entries you would need 32M bytes
> 	of memory at least.  i have never seen such big fast-path fowarding
> 	silicon.

Cisco is shipping TCAM based routers (Sup720/3BXL and RSP720) today that 
can handle 1 Million IPv4 routes.  If I understand the architecture 
correct, it will not do 1M IPv6 routes, but only 512 k IPv6 routes - but 
this is stuff shipping today.

I don't know about Cisco's CRS-1 and/or 12k architecture.

Juniper said on the RIPE meeting that they are currently shipping SDRAM
based boxes (M120 and MX960) that can handle 2M (IPv4-) routes.  I have
never worked with these, so I can't say how many IPv6 routes they will
do.

> 	so i need some fact-checking here - am i telling FUD, or the router
> 	vendors are telling people their pipe dream?

Routers are being scaled to handle IPv4 routing table explosion (especially
internal prefixes in bigger networks), and as a side effect, they can grow 
to more IPv6 prefixes as well.

Well, I think the IPv4 table is completely FUBAR, but for the next few
years, IPv6 will profit from it...

Gert Doering
        -- NetMaster
-- 
Total number of prefixes smaller than registry allocations:  113403

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