[c-nsp] Broadband Aggregation/Termination

[Andrew Gambell]

Hi Aaron,

Yes tracking usage, law enforcement requirements (who had what IP and what time etc), Also what if you don’t have access to the OLT/DSLAM/Cable Modem? In Australia at least we have a large government run wholesaler (NBNco) that sells in speed tiers which they police to. We have to shape per subscriber to a purchased speed or they hit the wholesale policers etc, which becomes important with how ASR1K ISG handles a dual stack PPP session and applying a shaper to this traffic.

Also failover is much easy with PPPoE, I can stick as many PPPoE servers on a network segment as I like and my users will typically balance over all devices evenly which becomes important for capacity management and dimensioning for failure etc. How do you handle gateway redundancy, do you use GLBP/HSRP?

In my experience scaling PPPoE to millions of subscribers has been way less painful than scaling DHCP based sessions to a few 100 thousand. 

Thanks

--Andrew Gambell

On 20/04/2017, 4:20 AM, "cisco-nsp on behalf of Aaron Gould" <cisco-nsp-bounces at puck.nether.net on behalf of aaron1 at gvtc.com> wrote:

    At the ISP where I work, we do DHCP on linux servers for ~40,000 bb
    subscribers....spread across dsl, ftth and cable modem
    
    Customer rate limiting occurs with bandwidth profiles in dslams, ftth olt's
    and cable modem config files
    
    Tracking usage ?  not sure what usage you are referring to
    
    We do have to track customer counts to match sufficiently sized subnets/dhcp
    pools.  It's an on-going task, but has recently been relaxed with rolling
    out cgnat for all 7,000 dsl customers since now I can throw plenty of
    10.x.x.x address space at each dsl vlan and forget about it
    
    -Aaron
    
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