OT: cheap colo space in Southern Germany/Munich

Eugen Leitl eugen at leitl.org
Sat Nov 24 20:03:38 CET 2012

On Sat, Nov 24, 2012 at 06:46:12PM +0000, Nick Hilliard wrote:
> On 24/11/2012 17:38, Eugen Leitl wrote:
> > E.g. see 
> > https://github.com/cjdelisle/cjdns/blob/master/rfcs/Whitepaper.md
> > which is an instance of street technology to address
> > multiple issues the current networks don't deal with.
> cjdns is certainly an interesting approach, but its inventor doesn't appear
> to understand:

I think you have several excellent points (those, that I could
understand, at least) and in fact I'll let cjd know.

Again, I don't claim that this particular design is
going to work. Just that is an instance of a coming
series of approaches which will result in a functional
system, eventually, some 10-15 years downstream.
> - scaling issues
> - point to multipoint networking
> - that deterministic reachability is usually considered a good thing
> - non-local connectivity lookup introduces hilarious denial of service
> mechanisms
> - the value of bitfield qos
> - that the use of bEncoding for connectivity lookup is a degree or two
> worse than using TLVs for the same means
> - full independence from traditional ip protocols ("Router messages are
> sent as normal UDP/IPv6 packets except that their UDP source and
> destination port numbers are zero and the hop limit (TTL) field in the IPv6
> header is set to zero.")
> - that strictly symmetric routing is a bug, not a feature
> - that 64 bits as a routing path mechanism is woefully insufficient for
> modern networking
> - that separation of control plane and data plane on a router is probably a
> good idea
> - throwing out the book on existing networking models is only valid if the
> proposed replacement is measurably better
> What's left in cjdns is a poorly specified mishmash of curious ideas which
> will work fine on the author's playpen network and which will break
> horribly on large networks, regardless of how hard the author waves the
> "hey look at me, i'm having a revolution" flag.
> Nick
Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
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