DoD IP Space
Doug Barton
dougb at dougbarton.us
Wed Feb 10 17:50:56 UTC 2021
On 2/10/21 5:56 AM, Ca By wrote>
> The 3 cellular networks in the usa, 100m subs each, use ipv6 to uniquely
> address customers. And in the case of ims (telephony on a celluar), it
> is ipv6-only, afaik.
So that answers the question of how to scale networks past what can be
done with 1918 space. Although why the phones would need to talk
directly to each other, I can't imagine.
I also reject the premise that any org, no matter how large, needs to
uniquely number every endpoint. When I was doing IPAM for a living, not
allowing the workstations in Tucson to talk to the printers in Singapore
was considered a feature. I even had one customer who wanted the
printers to all have the same (1918) IP address in every office because
they had a lot of sales people who traveled between offices who couldn't
handle reconfiguring every time they visited a new location. I thought
it was a little too precious personally, but the customer is always
right. :)
Sure, it's easier to give every endpoint a unique address, but it is not
a requirement, and probably isn't even a good idea. Spend a little time
designing your network so that the things that need to talk to each
other can, and the things that don't have to, can't. I did a lot of
large multinational corporations using this type of design and never
even came close to exhausting 1918 space.
Doug
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