Re: cogent update suppression, and routing loops

[ryanL <ryan.landry () gmail com>]

as stated, yep. i was on the phone with them for over three hours yesterday.

On Thu, Oct 2, 2014 at 9:08 AM, Paul S. <contact () winterei se> wrote:

> First time I'm seeing it, and I've been a Cogent client for quite a while.
>
> Have you tried getting in touch with their NOC yet? They're one of the
> most responsive in the industry.
>
>
> On 10/3/2014 午前 01:03, ryanL wrote:
>
> > hi. relatively new cogent customer. is what i've stated in my subject line
> > kinda standard fare with them?
> >
> > i've discovered that when i advertise a /24 from inside a larger /22 to
> > XO,
> > (who peers with cogent), and then pull the /24 some time later, that
> > cogent
> > holds onto the /24 and then bounces packets around in their network a
> > bunch
> > of times for upwards of 8-10 minutes until they finally yank it. this
> > effectively blackholes traffic to my /24 for anyone that is using a path
> > thru cogent.
> >
> > example: http://ryry.foursquare.com/image/0e0K1K0t0W2M
> >
> > it's been a bit of a frustrating experience talking to their noc to
> > demonstrate it, but i'm able to duplicate it on demand. even pushing
> > routes
> > using their communities to offload the circuit takes forever to propagate
> > even on their own looking-glasses.
> >
> > thx
> >
> > ryan