[AusNOG] NBN FTTN TC2 Services WA North West

[Paul Brooks]

TC2 and TC1 can be very sensitive to arguably overzealous policing, requiring tight
shaping at the NNI (POI) and attention to Ethernet buffering, burst limits and
inter-packet gaps or packets will be dropped.
Usually voice traffic on TC1 doesn't tickle the policing  though as the VoIP CODEC
naturally leaves good spaces between the packets. Data packets at TC2 different story.
Check packet-loss during the throughput tests, in each direction independently if you
can - overzealous inbound policing or inadequate outbound shaping will result in
packets being tossed due to micro-spikes in traffic, even when the long-term average
should be below the policing threshold - and that might be between your upstream and
the NBN kit at the POI, than between you and your upstream network.

Paul.


On 13/06/2018 7:51 PM, David Fowler wrote:
>
> Hi Brad
>
>  
>
> Sounds similar to our issue. I’ve sent umpteen graphs and iPerf results to Vocus.
>
>  
>
> Can I ask what the latency is on those links for you? Vocus are telling us it’s the
> latency at ~45ms that is causing the issues. Various throughput calculators are
> giving me anywhere between 8-9.5Mbps of bandwidth, yet we seem to be only able to
> achieve around half.
>
>  
>
> Cheers
>
>  
>
> David.
>
>  
>
>  
>
> *From: *Brad McEvoy <brad.mcevoy at overthewire.com.au>
> *Date: *Wednesday, 13 June 2018 at 17:32
> *To: *David Fowler <David.Fowler at datacom.com.au>
> *Cc: *"ausnog at lists.ausnog.net" <ausnog at lists.ausnog.net>
> *Subject: *Re: [AusNOG] NBN FTTN TC2 Services WA North West
>
>  
>
> Hi David,
>
>  
>
> I had a similar problem in the Wollongong area. We connected up the first TC2 in
> that area and when we tested the service, we never got the order speed. I logged a
> fault with OPTUS and sent them traffic graphs and test results. A day or two later
> they fixed the issue, they hadn't provisioned or ordered the back haul correctly.  
>
>
>  
>
> Brad McEvoy
> Senior Network Engineer
>
>  
>
> Image removed by sender. Over the Wire <http://www.overthewire.com.au>
>
>  
>
> Over the Wire Holdings Ltd (ASX:OTW)
>
> GPO Box 1807 Brisbane, QLD, 4001, Australia
>
> Level 9, 33 York Street, Sydney, NSW, 2000
>
>  
>
>  
>
> On 13 June 2018 at 18:15, David Fowler <David.Fowler at datacom.com.au
> <mailto:David.Fowler at datacom.com.au>> wrote:
>
>     Hi Folks
>
>      
>
>     Is anyone else running NBN TC2 only services? Having issues with services
>     running in the North West that are all backhauled to the Geraldton POI.
>
>      
>
>     Latency doesn’t seem extreme for the distance, usually ~45ms, but on say a 10Mb
>     TC2 service, we’re only achieving ~5.5Mbps. FTTN services connected to other WA
>     POIs, tops ~18ms, but seem to run OK.
>
>      
>
>     Any ideas?
>
>      
>
>     Cheers
>
>      
>
>     David.
>
>      
>
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