Re: oanet: are they the idiots they appear?

[fester <fester_(_at_)_clusterpower_(_dot_)_com>]

Quite a few large ISPs use these types of addresses.  While @Home may 
sometimes be the idiots they appear to be, they have effectively used 
10.0.0.0 network addresses.  As long as the ISP entry and exit points know 
who's who and where to point routes, it works for transit and stub networks 
and saves address space.  It is actually a good way to keep bogus traffic 
from hitting the net, it becomes locally routed in that ISPs AS.  You can 
filter rfc1918 addresses to a black hole route or route them somewhere 
local.  Quite often smaller ISPs do not filter these and force excess 
network traffic to the upstream providers (albeit small amounts).


At 01:51 PM 8/20/2001 +0100, Joe Warren-Meeks wrote:
> On Mon, Aug 20, 2001 at 11:33:58AM +0100, Peter Galbavy scribed:
>
> Hey Peter,
>
> > Notice the IP on hop 23 ? Are these people idiots ?
>
> Oh dear.. rfc1918 address space visible? I hope its just a piece of
> network kit that uses its management lan as the reply to for ICMP
> replies.
>
> I know that solaris boxes, when routing between qfe ports will reply to
> traceroutes going across them with the IP from the hme card. Not that
> you would want to do any routing with solaris machines, ever.
>
>  -- joe.