Re: Using x.x.x.0 and x.x.x.255 host addresses in supernets.

[Joe Provo <nanog-post () rsuc gweep net>]

On Tue, Jan 08, 2008 at 05:45:36AM -0800, Joshman at joshman dot com wrote:
> Hello all,
>   As a general rule, is it best practice to assign x.x.x.0 and
> x.x.x.255 as host addresses on /23 and larger?  

Yes.  Efficient address utilization is a Good Thing.

> I realize that technically they are valid addresses, but does anyone 
> assign a node or server which is a member of a /22 with a x.x.x.0 
> and x.x.x.255?

Great for router interfaces, loops, etc where you don't care that 
broken or archaic systems cannot reach them, and where the humans
interacting with them should have no issues.  

Cheers,

Joe

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