[NTLUG:Discuss] IP super/sub-netting maddness

[Wayne Walker]

On Tue, Sep 19, 2006 at 02:24:44PM -0500, Wayne Walker wrote:
> In theory, you could use 255.255.255.200 and 192.168.1.64.
 :( on BSD, but not on linux.  linux's ifconfig command considers the
netmask 255.255.255.200 as invalid.

FreeBSD, however, properly allows it...

http://www.bybent.com/non-contiguous-netmask-bsd.png

Note that it even properly calculated the broadcast address... :)

> BUT, why do you need to refer to those machines as a subnet?  For
> firewall rules?
I'm still curious here...   

-- 

Wayne Walker

www.unwiredbuyer.com - when you just can't be by the computer

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