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Good morning, so basically I am working with Packet Tracer atm and have 3 subnet plans assigned(management(104users), staff(43 users) and admin(35 users)). I have an ip address range of:38.191.0.0 and subnet mask of 255.255.255.0. I want to produce that subnet plan but with the most efficient use of the ip address range provided above. Could anyone give me a brief idea of how to transform that range to the most efficient use of the IP addresses? Thank you very much. The diagram looks as follows:

packet tracer diagram

JGuerra
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  • you're showing a switch, but apparently want subnets. Are you using VLANs and L3 switching to separate the users? ps. this is off-topic for stackoverflow.com – Alnitak Apr 29 '16 at 09:56
  • Yes that is it, I'm implementing VLAN's for each of the switches alog with inter-VLAN routing (router on a stick method). I didn't know it was off topic my apologies – JGuerra Apr 29 '16 at 10:00
  • Given the three groups you have, the only practical splits are a /25 for management, and a /26 for each of users and admin. – Alnitak Apr 29 '16 at 10:01
  • Hum, makes sense indeed. I'll have a thorough look at it but thank you ver much for answering this off topic subject – JGuerra Apr 29 '16 at 10:07
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    This has nothing to do with programming. It is off topic here and should be deleted. – nobody Apr 29 '16 at 11:58

1 Answers1

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(Answering in anticipation of this getting moved to a different SE site)

Given the size of your three groups (104, 43, 35) the only reasonable split is to allocate each of them to the next higher power of two, specifically (128, 64, 64) making that a /25 and two /26 blocks with nothing left over.

Note that this gives you 22 spare addresses in the first block, 19 in the second and 27 in the last.

p.s. is 38.191.0.0/24 really your netblock?

Alnitak
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    Don't answer off topic questions. – nobody Apr 29 '16 at 11:57
  • @AndrewMedico so just vote to close and help get it moved - no need to down vote stuff that'll be correct once it's on the right site. – Alnitak Apr 29 '16 at 11:58
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    If you want to answer it, wait until it's moved. Answering off-topic questions only encourages people to keep posting them. It is harmful to the site. – nobody Apr 29 '16 at 12:02
  • yes the instructions from the exercise i'm working on give that range of ip's – JGuerra Apr 29 '16 at 12:27
  • hey andrew i honestly didn't know and her/his answer does not encourage me to post other off topic questions, she/he was explicit and I won't do it again. – JGuerra Apr 29 '16 at 12:29
  • @JGuerra Oh look, you *did* do it again: http://stackoverflow.com/questions/37463414/dividing-a-given-network-in-4-subnets – nobody Nov 22 '16 at 12:18