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Issues encountered with assigning .0 and .255 as usable addresses?
- Subject: Issues encountered with assigning .0 and .255 as usable addresses?
- From: tore.anderson at redpill-linpro.com (Tore Anderson)
- Date: Tue, 23 Oct 2012 22:00:53 +0200
- In-reply-to: <[email protected]>
- References: <[email protected]> <[email protected]>
* Job Snijders
> In the post-classfull routing world .0 and .255 should be normal IP
> addresses. CIDR was only recently defined (somewhere in 1993) so I
> understand it might take companies some time to adjust to this novel
> situation. Ok, enough snarkyness!
>
> Quite recently a participant of the NLNOG RING had a problem related
> to an .255 IP address. You can read more about it here:
> https://ring.nlnog.net/news/2012/10/ring-success-the-ipv4-255-problem/
AIUI, that particular problem couldn't be blamed on lack of CIDR support
either, as 91.218.150.255 is (was) a class A address. It would have had
to be 91.255.255.255 or 91.0.0.0 for it to be special in the classful
pre-CIDR world.
That said, it's rather common for people to believe that a /24 anywhere
in the IPv4 address space is a ?class C? so I'm not really surprised.
--
Tore Anderson
Redpill Linpro AS - http://www.redpill-linpro.com/