On Sun, Apr 30, 2023 at 9:52 AM James Knott via talk <talk@gtalug.org> wrote:
On 2023-04-30 10:40, o1bigtenor wrote:
You seem to have this mastered - - - - then:
Yep. I also had some courses when I was at IBM, in the late 90s, and also went for my CCNA a few years ago.
How do I write more than 254 addresses in ipv4 using only the quad?
(You get no / anything - - - - just the 4 quads! The idea is that these are all permanently set - - - not just flitting temporary demands a la Mikkie D's example.)
You have fallen into the trap that I've been describing. That sort of thinking has been obsolete for 30 years. Have you seen any equipment that does not allow you to specify the subnet size on IPv4, at least other than consumer level gear? All the "/" does is tell you how long the network and host portions of the address are.
I think the issue here is that we are thinking of the use from 2 different ends. You are thinking solely from the router - - - and then your impassioned responses are likely correct. I just spent over 1/2 hour looking at a number of SoCs (3) and microcontrollers (also 3) and I can't find one where I can give it this 'classless' address you're talking about. I am limited to using the quad - - - unless I am using ipv6. Perhaps - - - - how can I run ipv6 inside (on my lan) and communicate out using ONLY ipv4? (Popcorn ready!) Regards