On Tue, Jan 4, 2011 at 4:05 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
you are looking at an additional ISP, like multihoming your offices? or 'you need more pipe in the offices'?
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"
If you bought an L2 ethernet link from 'office' to 'somewhere' why would speed be better? The previous question I asked (clarifying question) aims to help disambiguate this some... o If you buy a gig link to Comcast's IP network (with IP services from Comcast) that's one thing (then all, you hope) offices on the same network are 'faster'. You won't be crossing any of the (potentially) problematic isp peering links other folk have mentioned. o If you are buying ethernet transoprt to connect the offices together in a large vpls/mpls domain you'll probably be better off speed wise (unless there is drastically higher latency or loss) vs the existing links you have to comcast's IP network. (note also the VPLS/MPLS domain doesnt' imply external connectivity, necessarily) o If you are buying ethernet transport to link the offices to an external peering/ISP partner/provider then whatever happens on Comcast's IP network is immaterial (mostly) to this part of your network. -Chris
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 Consulting Radiologists, Ltd. 1221 Nicollet Mall, Minneapolis, MN 55403 ph. 612.573.2236 fax. 612.573.2250 dylan.ebner@crlmed.com<mailto:dylan.ebner@crlmed.com> www.consultingradiologists.com<http://www.consultingradiologists.com>