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Subnetting help?

Kaznith
By Kaznith
in Networking
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8 minutes ago, Lurick said:

You would create 8 subnets, there is no way to create exactly 6 subnets out of a /25 unless you're allowed to do variable length subnet masks and make a few /27s and then /28s

 

Just realized we have to use VLSM. You're right, thanks.

Posted

Hey guys,

 

I'm trying to do a class assignment, where we're given a network address with a prefix, and we need to create a certain amount of subnets. The address I was given was 192.168.10.0/25, and I need to create 6 subnets. We're ignoring the "usable" subnet number for now (we don't subtract 2). I'm having trouble borrowing bits from the host portion for this, because if I wanted to create 8 subnets, I'd borrow 3 bits, making it 192.168.10.0/28. However, I only need 6 subnets. Would I just create 8 subnets and call for two to be unused, or is there something I'm missing, and I actually can make exactly 6 subnets?

 

Thanks in advance.

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You would create 8 subnets, there is no way to create exactly 6 subnets out of a /25 unless you're allowed to do variable length subnet masks and make a few /27s and then /28s

Current Network Layout:

Current Build Log/PC:

Storage Server Setup:

 

Prior Build Log/PC:

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8 minutes ago, Lurick said:

You would create 8 subnets, there is no way to create exactly 6 subnets out of a /25 unless you're allowed to do variable length subnet masks and make a few /27s and then /28s

 

Just realized we have to use VLSM. You're right, thanks.

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https://linustechtips.com/topic/698214-subnetting-help/#findComment-8933416
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Just now, Kaznith said:

Just realized we have to use VLSM. You're right, thanks.

Well if you're using VLSM then it would be 4x /27s and 2x /28s I believe.

Current Network Layout:

Current Build Log/PC:

Storage Server Setup:

 

Prior Build Log/PC:

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https://linustechtips.com/topic/698214-subnetting-help/#findComment-8933418
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3 minutes ago, Kaznith said:

The way I'm setting it up is 3 /27s, 1 /28, and 2 /29s. 4 /27s would be 4 subnets of 64.

Whoops, that should have been flipped around. Two /27s and 4 /28s would make it right in my post but yours works as well :)

Current Network Layout:

Current Build Log/PC:

Storage Server Setup:

 

Prior Build Log/PC:

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Just now, Lurick said:

Whoops, that should have been flipped around. Two /27s and 4 /28s would make it right in my post but yours works as well :)

Yeah, subnetting is definitely the most complicated thing I've done thus far. It's almost like a puzzle. Thanks for the help.

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