Instead of over subscription ratios think about what each user is doing. Let's say one 1080p Netflix stream per customer, that's 6 mbps each. Perhaps provision for that and you'll have plenty. On 20/07/2014 11:06 AM, "Frank Bulk" <frnk...@iname.com> wrote:
> Thanks for sharing Ben, that's 450 kbps/sub at peak times! We see numbers > in our network closer to 300 kbps per subscriber. > > Assuming peak usage levels of 450 kbs/sub, that would be 15.75 Gbps for > Toney's customer base, and possibly more if they really have a 240 Mbps > offerings. But if there are 20 locations then it's an average of 787.5 > Mbps per location. If each site had a 10 Gbps interface (with 1 or 2 Gbps > of transport), then the core location should peer/buy transit with at least > two ISPs over four 10G interfaces. That way if one ISP/interface falls > away there's still sufficient capacity. > > We weren't told the geographical disparity of these 20 locations, but it > may be wiser for each location to peer/buy transit to two or more disparate > POPs rather than home them to one core location which has more single > points of failure. > > Frank > > -----Original Message----- > From: NANOG [mailto:nanog-boun...@nanog.org] On Behalf Of Ben Hatton > Sent: Friday, July 18, 2014 7:51 PM > To: nanog@nanog.org > Subject: Re: Cable Company Network Upgrade > > I don't think there are any 'budget' routers that would move the amount of > data you are looking at trying to do. > > 35k subs @ 240Mb is 8.4Tb/s at 100% utilization, even at a somewhat high > 100:1 oversubsctiption you are looking at over 80Gb/s > > While our DOCSIS network is only 4000 subs, we peak at around 1.8gb/s on > 10Mb packages, while oversubscription can increase with higher speed > packages, as many users would never use that much bandwidth, some will, and > even 1% of your customer base capping out a 240Mb would take most of a 10Gb > pipe, and you still would have 34000 other subs to handle. > > I can't see offering 240Mb service to over 35k subs on anything less than a > 100g core, and even that would be pushing it. > > Ben Hatton > Network Engineer > Haefele TV > > > > On Fri, Jul 18, 2014 at 2:33 PM, Chris R. Thompson < > chris.thomp...@solutioninc.com> wrote: > > > I think you oversubscribed... 10,000 to 1 seems a bit steep. > > > > > > > > > > > > On 07/18/2014 06:42 AM, Toney Mareo wrote: > > > > > > > > > > Hello, > > > > > > I working on a plan about improving/upgrading a Euro-DOCSIS3 > based > > cable network with the following requirements (very briefly): > > > > > > -20 CMTS-es on different locations needs to be connected to the > > network > > All of these locations currently connecting to the internet > > through 1Gbit/s link through a single internet provider, I have to > upgrade > > them to be able to connect to at least 2 but ideally 3 ISPs at the same > > time and use their links for failover (do bgp peering as well). > > > > What type of *budget* routers would you recommend to use for this > > purpose if cisco is not an option (the company doesn't want to buy cisco > > equipment)? If you can please give me exact model numbers. > > > > The company has over 35K customers at the moment which use > various > > cable modems on different areas (docsis1-3). In the future this network > has > > to be able to provide, max 240Mb download/30 Mb upload speed per > customer. > > > > I also have to give them a proposal about what type of docsis3 > > cable modems should they buy in the future. > > And in addition they need some ABR video streaming solution. > > > > I know it's a very brief statement and I left out a lot details, > > so any hw suggestions are more than welcome. > > > > Have a nice day folks! > > > > > > > > > > -- > > > > > > Christopher Thompson | Client Care | SolutionInc Limited > > Office: +1.902.420-0077 | Fax: +1.902.420.0233 > > > > Email: chris.thomp...@solutioninc.com > > Website: www.solutioninc.com <http://www.solutioninc.com/> > > > > SolutionInc Limited - Simplifying Internet Access > > > > SolutionInc Limited - Simplifying Internet Access With operations in more > > than 45 countries worldwide, SolutionInc is an established global leader > in > > Internet, centralized hotspot connectivity, billing and management > > solutions. SolutionInc provides software and services to the hospitality > and > > telecommunications industries through its award-winning, patented > > technology software products: SolutionIP(tm) and SolutionIP(tm) > Enterprise. > > Through 700,000+ touch points, SolutionIP(tm) allows people to easily and > > securely connect to the Internet from locations such as hotel rooms, > > convention > > centres, universities, restaurants and airports. Patent Information < > > http://www.solutioninc.com/patents/> > > > > If you have received this e-mail in error, please notify me immediately > at 902 > > 420 0077 or reply by e-mail to the sender and destroy the original > > communication. > > > > Thank you. > > > > > > > > > > > > >
