RE: Experiences with Comcast Ethernet

[Dylan Ebner <dylan.ebner () crlmed com>]

This is what we worry about as well. Right now, when the complaints start coming in, we can usually trace the problem 
to a comcast -> level3 -> qwest issue. Our big concern is we start seeing over subscription on the nodes (we have dealt 
with this in the past) and our problems start all over again.

Dylan Ebner, Network Engineer
Consulting Radiologists, Ltd.
1221 Nicollet Mall, Minneapolis, MN 55403
ph. 612.573.2236     fax. 612.573.2250
dylan.ebner () crlmed com
www.consultingradiologists.com

-----Original Message-----
From: Bret Clark [mailto:bclark () spectraaccess com] 
Sent: Tuesday, January 04, 2011 7:40 PM
To: nanog () nanog org
Subject: Re: Experiences with Comcast Ethernet


> On Tue, Jan 4, 2011 at 1:05 PM, Dylan Ebner<dylan.ebner () crlmed com>  wrote:
> > My company has about 2 dozen Comcast business cable accounts at satellite offices around the Midwest. We are looking 
> > at adding an additional ISP to the mix and we are thinking of purchasing an Ethernet circuit from Comcast in an 
> > attempt to increase performance on those connections by keeping all the traffic within Comcast's network.  Comcast, 
> > of course, has assured us this will result in "noticeable" speed increases for those accounts. I am more weary. Does 
> > anyone have any experience with Comcast's ethernet offerings? How reliable are they? Do Comcast cable connections 
> > see a significant performance improvement?
> >
> > Dylan Ebner, Network Engineer
It will only help if the performance issues  are related to the Comcast 
Internet peering connections, otherwise you'll see no difference if the 
issues are related to congestion occurring on the coax connections from 
the optical nodes that services each coax feed through neighborhoods and 
business. This is simple over-utilization that (at least in our neck of 
the woods) is becoming more and more a problem as Comcast saturates 
there networks with too many connections...there is only so much 
bandwidth a coax line can handle! I suspect your performance issues are 
related to the latter.
Bret