Date: Sun, 14 Dec 1997 22:39:14 +0100 (CET) From: Sake Blok <sake@euronet.nl> To: gme@sundial.net (George M. Ellenburg) Cc: isp@freebsd.org Subject: Re: Subnetting, Firewalls, Class C's Message-ID: <199712142139.WAA06757@support.euronet.nl> In-Reply-To: <3.0.5.32.19971214144719.009403c0@sundial.net> from "George M. Ellenburg" at "Dec 14, 97 02:47:19 pm"
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> Suffering from a cold, and heavy medication, I wish to run the
> following by some of you to confirm or deny that this subnetting
> example will work; everything tells me yes, but I would appreciate a
> second opinion:
>
> ip ranges netmask
> 204.181.150.1 -
> 204.181.150.14 255.255.255.240
>
> 204.181.150.17 -
> 204.181.150.30 255.255.255.240
>
> 204.181.150.33 -
> 204.181.150.46 255.255.255.240
>
> 204.181.150.49 -
> 204.181.150.54 255.255.255.248
>
> 204.181.150.57 -
> 204.181.150.254 255.255.255.56
A subnet must always be a power of 2 big or else the subnetmasking will
not work. You have to split the last entry up into 3 sections:
204.181.150.57 -
204.181.150.62 255.255.255.248
204.181.150.65 -
204.181.150.126 255.255.255.192
and
204.181.150.129 -
204.181.150.254 255.255.255.128
At least, that is what you have to do if you don't want to change the
first 4 subnets.
Sake
--
Sake Blok * * EuroNet Internet
Client Services Team * * Herengracht 208 - 214
* 1016 BS Amsterdam
E-mail: sake@nl.euro.net * Tel: +31 20 535 55 55
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