[134366] in North American Network Operators' Group
RE: Experiences with Comcast Ethernet
daemon@ATHENA.MIT.EDU (Dylan Ebner)
Wed Jan 5 09:46:18 2011
From: Dylan Ebner <dylan.ebner@crlmed.com>
To: Bret Clark <bclark@spectraaccess.com>, "nanog@nanog.org" <nanog@nanog.org>
Date: Wed, 5 Jan 2011 14:45:26 +0000
In-Reply-To: <4D23CBDC.3080301@spectraaccess.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
This is what we worry about as well. Right now, when the complaints start c=
oming 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 (w=
e 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]=20
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> wrot=
e:
>> My company has about 2 dozen Comcast business cable accounts at satellit=
e 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 t=
his will result in "noticeable" speed increases for those accounts. I am mo=
re weary. Does anyone have any experience with Comcast's ethernet offerings=
? How reliable are they? Do Comcast cable connections see a significant per=
formance improvement?
>>
>> Dylan Ebner, Network Engineer
>>
It will only help if the performance issues are related to the Comcast=20
Internet peering connections, otherwise you'll see no difference if the=20
issues are related to congestion occurring on the coax connections from=20
the optical nodes that services each coax feed through neighborhoods and=20
business. This is simple over-utilization that (at least in our neck of=20
the woods) is becoming more and more a problem as Comcast saturates=20
there networks with too many connections...there is only so much=20
bandwidth a coax line can handle! I suspect your performance issues are=20
related to the latter.
Bret
