On Thu, Nov 11, 2004 at 03:00:04AM +0000, Christopher L. Morrow wrote:
On Tue, 9 Nov 2004, Randy Bush wrote:
In today's networks, printers do NOT need global addresses. let me make sure i understand this. in order not to have to pay for the address space for a my enterprise's printers, they are supposed to make separate ether runs to them parallel to all the workgroup runs, so they can route them funny. then they are supposed to maintain all that routing cruft, port(s) on the routers, ...
not that it's a great plan, and excepting the popular router vendor 'features' with respect to multiple ip addresses per interface... you CAN put more than on broadcast domain on a single ethernet LAN.
As this is about IPv6: IPv6 devices MUST be able to handle multiple Addresses on one interface. As this is a requirement anyway it is reasonably safe to assume all devices on an IPv6 network are able to do that. As long as you do not assume Vendors will build non-standard. If you start thinking into that direction, anything is possible, so it would be unplannable anyway.
this does make for some 'fun' in configuration management and in deconflicting address space usages across larger enterprises as well. In general each ip device really ought to have a globally unique ip address, even if you never plan on connecting a network (something that would live more than a testing cycle) to the global internet. business plans change, partners come and go and technology is always making it easier to do things 'on the network' than off.
With IPv6 and autoconfiguration, you will at least have a link local address. So even with your setup, you will have a link-local and a globally unique address on each network interface. Nils