02-09-2007 04:17 AM - edited 03-05-2019 02:15 PM
Hi all, if I have subnet say 172.16.4.7/27
what would the first network be ? would it start 172.16.4.0 to 172.16.4.31
or would I start from 172.16.0.0 ?
02-09-2007 04:40 AM
Yes, for 172.16.4.0/27 network host address range would be 172.16.4.1 - 172.16.4.30 , 0 is network address and 31 is broadcast.
For 172.16.0.0/27 network host address range would be 172.16.0.1 - 172.16.0.31 , 0 is network address and 31 is broadcast.
02-09-2007 05:17 AM
Hi thanks for that, So does that mean for example 172.16.0.0/27 would include all the eay from 172.16.0.0 to 172.16.255.224 ? and if it was 172.16.4.0/27 would this go from 172.16.4.0 to 172.16.255.224 ?
thanks
02-09-2007 04:26 PM
Hi, carl
Subnetting of 172.16.0.0/16 into many equally subnetted /27 blocks would include all the way from 172.16.0.0/27 to 172.16.255.224/27,
and subnetting of 172.16.4.0/24 into many equally subnetted /27 blocks would go from 172.16.4.0/27 to 172.16.4.224/27
HTH
SSLIN
02-09-2007 04:49 AM
Hi, carl
It depends on what the "parent subnet" is.
If you subnet a 172.16.0.0/16 network into many /27 blocks, the first subnet will be 172.16.0.0/27.
If you subnet a 172.16.0.0/23 network into many /27 blocks, the first subnet will be 172.16.3.0/27.
If you subnet a 172.16.4.0/24 subnet into many /27 blocks, the first subnet will be 172.16.4.0/27
If you subnet a 172.16.4.0/26 subnet into two /27 blocks, the first subnet will be 172.16.4.0/27
HTH
SSLIN
02-09-2007 03:22 PM
can anyone add to this ?
02-11-2007 03:54 PM
Can anyone give me an example of what subnets we would have with say 10.1.1.5/27, would my first network be 10.0.0.0, second 10.0.0.32 etc ? right the way to 10.255.255.224 ?
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