[AusNOG] ADSL2+ line sync data

[Mark ZZZ Smith]

----- Original Message -----
> From: grenville armitage <garmitage at swin.edu.au>
> To: ausnog at lists.ausnog.net
> Cc: 
> Sent: Saturday, 14 September 2013 11:22 AM
> Subject: Re: [AusNOG] ADSL2+ line sync data
> 
> 
> 
> On 09/14/2013 10:15, Mark ZZZ Smith wrote:
>     [..]
>>  It's the ratio of downstream to update bandwidth that matters, and
>>  the likelihood of congestion in the upstream direction, not so much
>>  the bandwidth involved. The greater the ratio of downstream to
>>  upstream bandwidth, the more likely the problem is going to occur.
> 
> +1
> 
> (Seriously, Mark is right about http://tools.ietf.org/html/rfc3449. Still 
> relevant in our brave new asymmetric high speed world.)
> 


Where I most think it matters is that the service speeds people buy sets, quite reasonably, their expectations of what they'll be able to get out of their service.

So if a customer buys a 25/5 service for example, they'd expect that they'd be able to upload at 5Mbps while also downloading at 25Mbps. They probably won't be able to due to bandwidth asymmetry, which means that the ISP/RSP may be violating trade practices laws for false advertising. Or in the least, the ISP/RSP have to deal with customer complaints.

OTOH, if the ISP/RSP provided 25/25, then it is possible to both upload and download using TCP at full rates in both directions.

In the brave new NBN world, where people have data centers in their basement, are uploading X-rays from their iPhone 9, and streaming 4K security camera video of their cat to the Internet, I think the consequences of this asymmetry are going to become are more visible.


Regards,

Mark.

> cheers,
> gja
> _______________________________________________
> AusNOG mailing list
> AusNOG at lists.ausnog.net
> http://lists.ausnog.net/mailman/listinfo/ausnog
>