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

Randy Bush randy at psg.com
Wed Jun 24 13:24:26 CDT 2009


Iphone's. Are top posters :(

Imiho a stub must only be foo$

randy

On Jun 24, 2009, at 11:18, "Michael K. Smith - Adhost" <mksmith at adhost.com 
 > wrote:

> That was my assumption when I checked the "UCLA is wrong" button on  
> the
> form.  We only have one downstream, but it's a distinct ASN so that  
> says
> "not stub" to me.
>
> Mike
>
> Randy top posting - will wonders never cease.
>
>> -----Original Message-----
>> From: Randy Bush [mailto:randy at psg.com]
>> Sent: Wednesday, June 24, 2009 10:58 AM
>> To: Ricardo Oliveira
>> Cc: NANOG list
>> Subject: Re: Use of Default in the DFZ: banned in philly,see it now  
>> on
>> the net!
>>
>> 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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