IP subnet-zero and efftects on 2^n-2=S

itdaddy

Hey Cisco gurus; help!

okay ip subnet-zero means you can use the 0000s place subnet when
calculating subnet ranges?

so how does it effect these two equations:


2^n-2=S
2^n-2=H

is it now when using ip subnet-zero

2^n-1=s
2^n-2-h


does it only affect subnet address count or host as well.

thanks

Netstudent

look at the top of the forums page and click search. Then do a keyword search for ip subnet-zero. You will get more threads than you can shake a crossover cable at. you will never only subtract 1. You will subtract 2 or nothing at all. Ip subnet zero defines the use of the all 1's subnet as well. The broadcast subnet. Even though it is posible to use, it may not be a good idea in certain situations but technically you can use it. Look around and do some research and it will stick in your head better than someone just telling you what to do. Good luck!

itdaddy

thanks; just need to hear that..pushed in my head that old way!.
but i think i can tell the difference if presented with a situation.
thank you for replying