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choosing a private ip addressing scheme

Posted on 2007-07-20
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choosing a private ip addressing scheme for our Vlan's/departments.

because its private i dont really need to be conservative and use VLSM...
Should i use something logical? or can i use something that is easily remembered?

for example:

172.16.0.0   \16 for core infrastructure.
172.16.10.0 \24 for department 1
172.16.20.0 \24 for department 2
172.16.30.0 \24 for department 3 etc....

would that be ok?

or can you suggest the correct way to do this?

Many thanks!
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Question by:chouckham
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dhoffman_98 earned 2000 total points
ID: 19532025
Almost.

First, here are the notes on RFC 1918, which defines the IP Addresses to use for private subnets: http://www.faqs.org/rfcs/rfc1918.html

Take a look at what you are doing there. You have 172.16.0.0/16 for your core. But then you show 172.16.10.0/24 for department 1. Keep in mind that the 172.16.10.0/24 subnet is part of the already defined 172.16.0.0/16 subnet.

The only change I would make is to pick another 24 bit masked subnet to use for core infrastructure, unless you truly intended for all the department subnets to be subnets of a subnet.

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by:chouckham
ID: 19557175
Thank you!
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