Re: Rogers Canada using 7.0.0.0/8 for internal address space

["Patrick W. Gilmore" <patrick () ianai net>]

On May 24, 2011, at 12:36 AM, Jimmy Hess wrote:
> On Mon, May 23, 2011 at 11:09 PM, Patrick W. Gilmore <patrick () ianai net> wrote:
> > If they do, any Rogers customer who wants to talk to it is screwed.  Whether they have a 7 addy or not, Rogers' 
> > routers will not let the packet leave Rogers' borders.
>
> That could depend on whether Rogers' border routers are adequately configured
> to block/filter the announcement,  and whether  whatever the DoD  chose to
> announce was a longer prefix than what  Rogers' equipment had
> routes/controls for.
>
> In theory;  there exists a possibility that the DoD could announce a
> /24  of something
> Rogers'  was internally routing as a /16,  then if unfiltered the DoD
> announce could win,
> causing internal (self-inflicted) issues for Rogers.

We're all just guessing here, until some Rogers engineer speaks up.

However, many networks take active steps to assure that external parties cannot disrupt their internal network.  Anyone 
on this list with internal prefixes shorter than /24 likely have filters or other mechanisms in place to ensure they do 
not hear a /24 of their own space from peers & transit providers.  If they do not, then they are at risk, whether they 
use highjacked space or not.

As a result, while it is possible the DoD could announce a /24 that Rogers routes internally as a /16 and cause Rogers 
problems; I suspect Rogers ensured the DoD - or anyone else - cannot cause them problems.  Other than putting a web 
server in 7/8 that Rogers customers want to visit. :)

-- 
TTFN,
patrick


> The DoD could also eventually use the 7 range for something, resulting
> in complaints to Rogers
> from users who seem unable to reach (some web site placed in 7/8).
>
>
> Unofficial use of other organization's IP address space is playing with fire.
>
>
> It may mark the symbolic start of a new IPv4,  where eventually
> many /8s will have tons of unofficial claimaints,  and whoever
> threatens more, pays the major providers more, or has more lawyers
> (take your pick),  gets their announcement more widely propagated.
>
> Sometimes if enough players start playing with fire, a really bad,
> uncontrollable inferno eventually gets ignited.
>
> > TTFN,
> > patrick
> --
> -JH