nanog mailing list archives
cogent update suppression, and routing loops
From: ryanL <ryan.landry () gmail com>
Date: Thu, 2 Oct 2014 09:03:15 -0700
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
Current thread:
- cogent update suppression, and routing loops ryanL (Oct 02)
- Re: cogent update suppression, and routing loops Paul S. (Oct 02)
- Re: cogent update suppression, and routing loops ryanL (Oct 02)
- Message not available
- Re: cogent update suppression, and routing loops ryanL (Oct 02)
- Re: cogent update suppression, and routing loops Paul S. (Oct 02)
- Re: cogent update suppression, and routing loops Jon Lewis (Oct 02)
- re: cogent update suppression, and routing loops Nick Olsen (Oct 03)
- Re: cogent update suppression, and routing loops Brandon Ewing (Oct 03)
- Re: cogent update suppression, and routing loops ryanL (Oct 03)