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-bounces@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.thompson@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!
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