[Planetlab-devel] IPv6 support for MyPLC

[Bound, Jim]

Hi Marc,

OK I must be dreaming and don't have the time now to chase all the
mails.  But I thought I heard someone say each host had multiple IPv4
addresses.  Now that you state this suggest PLL simply use stateless
addr conf and get the IPv6 host address from a range of routers in the
market that can do this.  As you well pointed out the next step is
putting in the DNS but that is part II.

thanks
/jim 

> -----Original Message-----
> From: Marc E. Fiuczynski [mailto:mef at CS.Princeton.EDU] 
> Sent: Thursday, November 09, 2006 12:36 PM
> To: Bound, Jim; devel at lists.planet-lab.org
> Subject: RE: [Planetlab-devel] IPv6 support for MyPLC
> 
> Hi Jim,
> 
> Today all PlanetLab nodes are configured by the hosting site. 
> Currently there is just one global IPv4 address per host. The 
> technical contact at the hosting site assigns a static IPv4 
> address (either manually or via DHCP).
> It is not clear we can assume that sites will bring up DHCPv6 
> servers on our behalf (especially since we strongly request 
> to be in a DMZ outside of their firewall).  Maybe they will, 
> but a big concern is the convergence timeframe
> + the sheer amount of email we might have to send/receive when asking 
> + sites
> to turn on IPv6 support on our behalf.  For this reason, I'd 
> like to arrive at a solution that factors out most (ideally 
> all) human interaction with sites.  The basic assumption is 
> that a site supports IPv6 on their router and advertise 
> global IPv6 prefixes to the nodes.
> 
> The challenge is to also assign global IPv6 addresses to each 
> "virtual machine" (sliver) on each node.  Where do those 
> addresses come from, considering we wont have DHCPv6? Hence 
> the discussion of trying to come up with an autoconf scheme 
> that assigns a EUI per sliver.
> 
> > I believe stateless autoconfig will work ...
> 
> Which one?
> 
> > ... the problem is that
> > any IP architecture view assumes some entity absorbs the IP address 
> > ...
> 
> I don't understand the problem you are stating.  Please rephrase this.
> 
> > I had indirectly suggested a software VLAN switch to 
> multiple vservers 
> > on a single node for IPv6 with use of prefix bits and same EUI.
> 
> I think I understood this suggestion, but maybe I did not.  
> Please give an explicit example.  Also, what would we need to 
> ask each site to make such a solution work?  Do they have to 
> give us a set of prefixes?  Is it reasonable to ask for 
> dozens or hundreds of those prefixes per node?  How would one 
> coordinate the prefix assignment amongst hosts at a site?
> 
> > IPv6 has done its job the tools exist.
> 
> No doubt!  I am just trying to figure how to make it work in 
> the real world when faced with ~100 "virtual machiens" per 
> phyiscal host and the lack of a
> DHCPv6 server.
> 
> Thank you for your feedback!
> 
> Best regards,
> Marc
> 
>