[175760] in North American Network Operators' Group
Re: Comcast throttling?
daemon@ATHENA.MIT.EDU (John Neiberger)
Fri Oct 31 15:55:53 2014
X-Original-To: nanog@nanog.org
In-Reply-To: <CACBmxzf1wD8fzDkzOM4bx=DO2GiQoS0vO-m0eYCjD+aoDpFSyg@mail.gmail.com>
From: John Neiberger <jneiberger@gmail.com>
Date: Fri, 31 Oct 2014 13:55:13 -0600
To: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
Replying off-list as requested.
John
On Fri, Oct 31, 2014 at 1:41 PM, Mark Price <mprice@tqhosting.com> wrote:
> Similar to another thread on the list today, I'm troubleshooting a problem
> for a customer on Comcast business fiber.
>
> Downloading a file from one of our web servers is very slow (~15KByte/sec).
> mtr looks clean in both directions. I added an IP address on the same
> server from a different class C on our network, and downloads form this new
> IP are fast (2MByte/sec).
>
> Tracerouting from server to client is the same using both source IPs. But,
> one IP consistently has the very slow speeds that the other does not.
> Changing our outbound path between different upstreams does not make a
> difference.
>
> It certainly feels like Comcast is throttling one of our IP ranges. Could
> someone at Comcast please contact me off-list for details?
>
>
> Thanks,
>
> Mark
>
