[Planetlab-devel] IPv6 support for MyPLC

[John Jason Brzozowski (CISSP, RHCT)]

Hey Marc,

Sorry to jump in late on this thread.  What approach did you end up
going with?

John

On Thu, 2006-11-09 at 10:01 -0500, Marc E. Fiuczynski wrote:
> Hi Jim + *,
> 
> Thanks for the feedback.  The problem with static IPv6 assignment is that it
> involves some sort of central/coordinated management.  It is not clear that
> we can request 300+ sites to set this up on our behalf, especially as we
> insist to be on the outside of firewalls etc.  Before resorting to such a
> solution (which I personally consider a cop out and IPv6 not delivering on
> its promise), I wanted to explore what one could do with the EUI.
> Continuing the search for a reasonable zero-admin autoconf solution, my
> sense is that we could do the following:
> 
> 1) acquire a 24bit IEEE company id + assign some random 24 bit value and
> rely on DaD to ensure uniqueness
> 
> or
> 
> 2) overload the special 15bit value for EUI/MAC-48 encapsulation into EUI-64
> and hope it wont conflict with IPv6 over firewire
> 
> or
> 
> 3) leverage the fact that all PL nodes will be dual stacked and that each
> physical link will have a proper IPv4 address that is either statically
> assigned or obtained by an existing DHCP server to generate a unique EUI
> that identifies the VM.  One idea is to leverage something that essentially
> looks like a IPv4-mapped-IPv6 address, except that it is permitted to have a
> proper IPv6 prefix.  E.g., suppose the host is assigned 128.112.139.71, then
> its corresponding link local address could be fe80::ffff:128.112.139.71,
> right?!  We can now use the unused upper 16bits to uniquely identify each
> sliver.  E.g., sliver #500 would be fe80::500:ffff:128.112.139.71.
> 
> Thoughts?
> 
> Marc
> 
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John Jason Brzozowski, CISSP, RHCT
jjmb at jjmb.com
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