subnet - Trouble subnetting a network

I have the network address 160.80.0.0/24 and have to subnet things like this:

alt text

How would I subnet this network to accomodate such a huge number of hosts? :D Any guidance for a newbie? I've already read the How Does Subnetting Work post, but they use small number examples, not big like this.

I have to use CIDR and VLSM.

Thanks guys! :D

Answer

A /24 subnet only holds 254 host addresses. If you have 16.000 hosts, you need a larger subnet. If you really only have 160.80.0.0/24 then you are asking the impossible.

A /18 will hold 16.383 hosts, which should be enough. Or, if you have two distinct subnets of 8.000 hosts each, a couple of /19 subnets would be better.

Assuming the whole /16 network at Universita' di Roma is at your disposal, you might do this:

 subnet            Broadcast       Netmask     #Hosts

160.80.0.0/17    160.80.127.255  255.255.128.0  32767
160.80.128.0/18  160.80.191.255  255.255.192.0  16383
160.80.192.0/19  160.80.223.255  255.255.224.0  8191
160.80.224.0/19  160.80.255.255  255.255.224.0  8191

/Carlos

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