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subnetting question

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Old 11-Sep-2008, 02:12 PM
azrael2000 azrael2000 is offline
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Question subnetting question

Hi All.

Have a little question about subnetting.

I understand how to subnet an address to get the number of hosts or networks required.

That is not a problem; however, if I have subnetted an IP, then want to subnet one of the subnets (hope that makes sense) how do I do it?

I've tried a couple of different books but nothing is making sense...

Regards

 
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Old 11-Sep-2008, 02:16 PM
hbroomhall hbroomhall is offline
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Just take the subnet range and run it through again? Unless there are other constraints I would have thought this would be the way to do it.

Harry.

 
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Old 11-Sep-2008, 07:14 PM
azrael2000 azrael2000 is offline
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Question

Ok, so if I take, for example 192.168.10.0 and make it a /28... that would leave me with subnets like

192.168.10.0, 192.168.10.16, 192.168.10.32 and so on...

If I want to take the 192.168.10.32 and make it into a /30, then what would the new subnets be and why?

That's where I get a little confused.

Regards

 
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Old 11-Sep-2008, 07:20 PM
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Quote:
Originally Posted by azrael2000 View Post
Ok, so if I take, for example 192.168.10.0 and make it a /28... that would leave me with subnets like

192.168.10.0, 192.168.10.16, 192.168.10.32 and so on...

If I want to take the 192.168.10.32 and make it into a /30, then what would the new subnets be and why?

That's where I get a little confused.

Regards
Just subnet it into /30-sized chunks. How many addresses are within a /30 subnet? Four, right? Two host addresses, a network address, and a broadcast address. So, split up a /28-sized chunk (of 16 addresses) into multiple /30-sized chunks:

192.168.10.32/30
192.168.10.36/30
192.168.10.40/30
192.168.10.44/30


BosonMichael
MCSE+I, MCSE: Security, MCDST, MCDBA, OCP, CCNP, CCDP, CNE, SCSA, Security+, Linux+, Server+, Network+, A+
Served proudly, US Army, 98C Intelligence Analyst, '89-'92
 
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Old 25-Oct-2008, 09:57 AM
gamava gamava is offline
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Try Variable length subnet mask(VLSM)

 
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