Question about IPAM tools for v6

Sam Wilson Sam.Wilson at
Mon Feb 3 12:11:31 CET 2014

On 31 Jan 2014, at 15:26, Alexandru Petrescu <alexandru.petrescu at> wrote:

> Speaking of scalability - is there any link layer (e.g. Ethernet) that supports 2^64 nodes in the same link?  Any deployed such link? I doubt so.
> I suppose the largest number of nodes in a single link may reach somewhere in the thousands of nodes, but not 2^64.

Let me de-lurk and make the obvious point that using standard Ethernet addressing would limit the number of nodes on a single link to 2^47, and that would require every unicast address assigned to every possible vendor.  Using just the Locally Administered addresses would limit you to 2^46.

Sam Wilson
Communications Infrastructure Section, IT Infrastructure
Information Services, The University of Edinburgh
Edinburgh, Scotland, UK

The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.

More information about the ipv6-ops mailing list