[Nanog] Cogent Router dropping packets

Paul Wall pauldotwall at gmail.com
Mon Apr 21 04:57:24 UTC 2008

On Sat, Apr 19, 2008 at 7:26 PM, manolo <mhernand1 at comcast.net> wrote:
> Some things just never change at cogent.. fought them for months way
>  back when to get me off their infamous 2 bgp peer setup after many an
>  outage due to this setup, they finally put us on a single bgp session
>  but it took forever. Lets just say cogent didn't last long at the
>  company I worked for.

Could you provide additional details on the failure mode experienced
resultant from this "two tiered" configuration?  How did moving to a
"conventional" configuration with a single directly-connected neighbor
solve things?

What steps were taken during your postmortem and subsequent lab
simulations to verify that the outages were not with the customer-side
implementation, or perhaps a simple typographical error?

Here in H-town, we are deploying a metro/BLEC network comprised of
1000s of small L3 boxes not carrying full tables (Cisco 3560 and
similar), and would like very much to learn from these major
architectural mistakes, so that we can avoid similar outage scenarios.
 Any information you could provide would be excellent.

>   You get what you pay for....

Not passing any judgment on quality, Cogent is more towards the middle
of the road for price, these days, on larger commits.

Paul Wall

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