Re: What is the most standard subnet length on internet

[Nathan Ward <nanog () daork net>]

On 23/12/2008, at 2:24 PM, Seth Mattinen wrote:
> Nathan Ward wrote:
> > On 23/12/2008, at 1:31 PM, Seth Mattinen wrote:
> > > Anyone running a platform that can't take a full table would apply  
> > > such a filter to weed out anyone who likes to announce all of  
> > > their space as /24's for "traffic engineering". If one does that  
> > > and doesn't announce the aggregate as well, one could find  
> > > themselves facing random black holes.
> > People are filtering /24s without a 0/0 route?
>
> I was just referring to LIR boundaries, but yes, I've seen it happen  
> where someone splits their /22 into only /24s and doesn't announce  
> the covering /22.


Yes, it happens all the time.

Let me rephrase; Are there people who are filtering /24s received from  
eBGP peers who do not have a default route?

I mean the networks who receive those prefixes, not the ones who  
advertise them.

--
Nathan Ward