all zeroes/all ones used in host IP's...

[Carlos Morgado]

On Fri, Jan 28, 2000 at 12:44:51PM -0500, Mike A. Harris wrote:
> On another mailing list I'm on there is a small discussion about
> using "0's" in IP addresses.  Nobody could categorically say
> wether or not they are allowed or not including myself, so I
> hunted down RFC 1123, and found the relevant section.
> 
> Here it is:
> 
>             IP addresses are not permitted to have the value 0 or -1 for
>             any of the <Host-number>, <Network-number>, or <Subnet-
>             number> fields (except in the special cases listed above).
>             This implies that each of these fields will be at least two
>             bits long.
> 

it means you can't have a 0.0.10.10/16 or 10.10.10.0/32 or a 255.0.0.1/8 or
a 10.10.1.255/32.

Look at the proper definitions for *-number. That paragraph protects network
and broadcast adresses from being used for hosts or networks.


-- 
Carlos Morgado - chbm(at)chbm(dot)nu - http://chbm.nu/ -- gpgkey: 0x1FC57F0A 
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		.... system going down imediatly ....


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