Cogent move without renumbering

Fri Oct 7 20:49:11 UTC 2005

> 
> On Fri, 7 Oct 2005, Hannigan, Martin wrote:
> 
> >> Is it reasonable to think that numerous /24's from L3's IP
> >> space could be
> >> reassigned elsewhere without causing significant trouble for
> >> L3 and others? Even
> >> if it could work, what would be the justification for taking
> >> L3's property?
> >
> > Depending upon the circumstance, yes:
> >
> > http://www.cctec.com/maillists/nanog/current/msg01880.html
> 
> I think that is not entirely correct comparison. Original 
> poster did not 
> not say that the current L3 customers would entirely leave 
> L3, but that
> he asked if they could do something to get other type of 
> connectivity if
> they have L3 ip space.
> 
> The answer is that if they have /24 or longer and have router 
> then they
> can turn on BGP and announce that /24 both to L3 and to 
> another ISP and
> in this way have full connectivity. This would not be an 
> attempt to take
> ip ip space away from L3. But this is not something they 
> could do within 
> couple days if they do not run BGP and do not have ASN (takes 
> at least a 
> week to get it from ARIN).

For a minute there, I thought you might be right since I'm browsing
for clue factor and may have missed something, but, it appears you
are inaccurate in this as the poster did say:

--QUOTE

"If a single-homed network moves from L3 to Cogent, how would they benefit? Would 
they not still be cut off from a significant percentage of the Internet?

Is it reasonable to think that numerous /24's from L3's IP space could be 
reassigned elsewhere without causing significant trouble for L3 and others? Even 
if it could work, what would be the justification for taking L3's property?"

--END QUOTE

That quote is asking if someone can take Level(3)'s PA space assigned with them
to another providers network. The answer is yes, it's possible. 

IANAL