[ppml] Alternative Routing Methods (Was: getting converts to V6)

[Jeroen Massar]

[ Changing subjects is actually handy, more ppml OT'ness ]

Owen DeLong wrote:
[..]
> Right.  As such, I think, instead, we should focus on fixing routing.
> That is possible. Here's how:
> 
> Using options, the destination AS of a packet headed to a non-local
> prefix (non-local being defined as orginating from an external ASN)
> can be encoded in the packet by a router prior to its departure from
> the local AS. Then, all transit AS can forward the packet strictly based
> on the destination AS without ever even looking at the prefix.

You do realize that ASN's are nowadays 32bits and as such you are
actually just encoding the next-hop IPv4 address in the packet?
A gateway to say, more or less.

As such, you can possibly, still end up with 2^32 of addresses.

Or to make it easier, to use this, just use 6to4. Use IPv4 in the
'backbone routing tables' and give everybody as 6to4 /48. You could even
trow out the first 16 bits and make it just <aabb>:<ccdd>::/32. Or use
ASN's there directly of course. Do note that we already have /32's for
most sites, except PI, so you are back to square 1.

> The lookup to map Prefix->origin AS can be done in a distributed
> fashion similar to DNS

How exactly are you going to reach that "DNS" when, to get there, you
need to look up an address in that DNS. It is like saying that one
should call the directory services to then be able to look up the number
for directory services that you need to be able to call directory
services, repeat ad infinitum.

In case you really think this solution is a the golden pie, please write
it up in a draft text, add some pictures to clarify it much better, post
it to some nice place (IETF seems like an idea, e2e list too).

Greets,
 Jeroen

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