[71957] in North American Network Operators' Group
Re: The use of .0/.255 addresses.
daemon@ATHENA.MIT.EDU (Richard A Steenbergen)
Sat Jun 26 22:04:59 2004
Date: Sat, 26 Jun 2004 22:03:49 -0400
From: Richard A Steenbergen <ras@e-gerbil.net>
To: Jonathan McDowell <noodles@earth.li>
Cc: nanog@nanog.org
In-Reply-To: <20040626233240.GP27974@earth.li>
Errors-To: owner-nanog-outgoing@merit.edu
On Sun, Jun 27, 2004 at 12:32:40AM +0100, Jonathan McDowell wrote:
>
> Have just spent some time trying to track down what seemed to be an
> elusive problem, I thought I'd mention it here.
>
> I've had problems accessing www.level3.net, www.ebay.co.uk and
> www.dabs.com (and a few others I don't recall). As I'm the first user of
> a reasonably new netblock I thought it might be something to do with
> filters on our upstreams or similar. Trying an IP from our older
> netblock worked without problems, which seemed to back this up.
>
> However eventually I tracked it down to the use of the .0 address from
> the new netblock; changing to use the .1 address meant I could access
> the above sites without any difficulty.
>
> Various people I've asked about this have said they wouldn't use the .0
> or .255 addresses themselves, though couldn't present any concrete info
> about why not; my experience above would seem to suggest a reason not to
> use them.
This is what happens when your educational system continues to teach
classful routing as anything other than a HISTORICAL FOOTNOTE
*coughCiscocough*. This is also how you end up with 76k /24s in the global
routing table.
Do you part to help control the ignorant population: whenever you hear
someone say "class [ABC]" in reference to anything other than a historical
allocation, smack them. Hard.
--
Richard A Steenbergen <ras@e-gerbil.net> http://www.e-gerbil.net/ras
GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)
