IP Subnetting

rbizzell

Hello Eveybody I am new to the forum. I have a question. I have to reconfigure my private network because I am running out of available IP addresses. The original addressing scheme I used was for 254 host. I want to have available 512 using the network 10.1.0.0 subnet mask 255.255.254.0 /23. The part I am confused is what are my valid host. 10.1.0.01 to 10.1.1.254. What are the host ip adresses in between that give me 510 available addresses. I appreciate anyone help.

dtlokee

10.1.0.0/23 would give you 9 host bits so 2**9 - 2 = 510, you have that part, also the range of valid addresses woulf be 10.1.0.1 - 10.1.1.254 you have that correct as well, if you convert the address to binary and keep the first 23 bits from the 10.0.0.0 and fill in the last 9 bits with "0.0000 0001" and "1.1111 1110" then convert back to decimal that will show you the lower and upper bounds of the range


0000 1010.0000 0001.0000 0000.0000 0001
0000 1010.0000 0001.0000 0001.1111 1110

The part in red is the host portion of the address

nel

im not very good at doing subnetting in my head although i do understand it.

i would suggest http://www.subnet-calculator.com/ or google another and this will give you a visual on your requirments. just put them in and it will give you what you need.