Use of Default in the DFZ: banned in philly, see it now on the net!

Randy Bush randy at psg.com
Wed Jun 24 12:58:09 CDT 2009


OK,a buckety of salt.

 From my pov, a stub has zero downstreams.

randy, on iPhone

On Jun 24, 2009, at 10:39, Ricardo Oliveira <rveloso at cs.ucla.edu> wrote:

> Jack,
> Please give me your ASN and i'll double check our data. As long as  
> the network has 4 or less downstreams, it's  being labeled as "stub".
> More details here:
> http://www.cs.ucla.edu/~rveloso/papers/completeness-ton.pdf
>
> Thanks,
>
> --Ricardo
>
> On Jun 24, 2009, at 6:44 AM, Jack Bates wrote:
>
>> Randy Bush wrote:
>>> please do check your as at <http://psg.com/default/> and then  
>>> actually
>>> look at your router config.  i found one of my routers still had a
>>> default from when i was bringing it up.
>>
>> Ick. Nothing was right. Reported as mixed, though that may be my  
>> fault and not your testing. Hmmm. Or your test didn't take some  
>> things into account like changes over time. Normally I keep a  
>> default route available, but due to changing IGP internally I  
>> actually have a default which points interior from the edge  
>> routers. So when I shut down the last BGP session on the old cisco,  
>> the defaults to the transits went away.
>>
>> Was also reported as a stub. Glad to know that I don't have BGP  
>> customers. Oh, wait, I do. :)
>>
>>
>> Jack
>




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