Re: [lir-wg] Discussion about RIPE-261

[Gert Doering <]

Hi,

On Tue, May 27, 2003 at 07:46:01AM -0700, Michel Py wrote:
> Which basically says that we should allow /48 prefixes punched from PA
> space in the Global Routing Table. I am sure the educated reader that
> subscribes to this list will appreciate, especially smaller LIRs that
> can't afford a c12416 or M160 to hold a huge routing table.

While I'm not sure whether it's "the perfect solution" (it isn't), I 
disagree with you on the "evilishness" of it.

There are two dangers with it:

 - it might blow up the IPv6 table to the number of currently active
   IPv4 ASes.  That would be about 15.000, and shouldn't hurt any
   decent router (yes, my 2503 will not like it, but then, I always
   knew that it's not a proper core router anymore).

 - if there really starts a big run to IPv6 multihoming, it will increase
   pressure on the AS allocation/conservation policy (and we'll eventually
   run out of 16 bit ASNs, which would hurt).

Also, it might not even be sufficient - some companies might still want
to be "really, really independent" and get their own address block.

The *benefit* of "/48 multihoming" is that you can filter those routes
if you don't want to see them - then your routers will send packets
down the /32 road, and eventually hit a router that knows about the /48
(which is why I consider this approach superior to "everybody gets a 
independent prefix", which I can't properly aggregate).  Which brings
us back to "why I want ONE regional block per RIR" - that's why.

(I do not think we need to discuss this - I won't be able to convince you,
you won't be able to convince me - I just wanted to point out that there 
are more points of view to this)

Gert Doering
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