[j-nsp] bla.bla.bla.0

[Richard A Steenbergen]

On Sun, Dec 12, 2010 at 12:16:59PM -0200, Rubens Kuhl wrote:
> 
> That's a nice feature of using .0 and .255 addresses on what used to 
> be class C space: Windows bots won't DoS you.

We tried using .255/32 as a loopback address, but certain Cisco routers 
(even running pretty modern code) refused to accept it as anything other 
than a directed broadcast address, even when they had the /32 in their 
rib learned via igp. Getting back replied from unrelated interfaces when 
trying to ping a neighboring router loopback got real old real quick.

God only knows what the more obscure and/or less service provider tested 
platforms will do when confronted with these things, which is one of the 
biggest issues with enabling such new (yes I know it's actually quite 
old, but never underestimate the incompetency of people) features. For 
example, last I looked Foundry/Brocade puked if it so much as received a 
/31 via a routing protocol, which made it a real problem if you ran /31s 
and ever needed to add one of those boxes to your network later on.

-- 
Richard A Steenbergen <ras at e-gerbil.net>       http://www.e-gerbil.net/ras
GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)