[AusNOG] Telstra NBN Woes in Toowoomba

[Greg Lipschitz]

We had a client on a Telstra NBN connection and found the same thing.

After much poking of the Telstra bear we got the following response;
"If the customer has a BYO router, they will need to ensure that all VoIP traffic (SIP signalling and RTP audio) has its QoS DSCP set to "Best Effort" in the handsets, OR has the router set to Remark ALL traffic as "Best Effort"."

Indeed, we found this to be the case as if we sat on the Mikrotik and change it from 43 (EF) to 0 (BE) it worked. You could start a call with DSCP 0, mid call change it to EF and watch the packets get dropped by Telstra, change it back and bingo, all working again.

It seems the reason Telstra are only allowing Telstra SIP trunks to use EF is so that they can sell "Phone Bundles" over the COS4 NBN plans and don't have to pay for COS1 on NBN and use the UNI-V ports thus blocking any competition using a Telstra tail to deliver voice with EF QoS tags.

Pain in the arse for those trying to sell VoIP and be carrier agnostic,... but They're Telstra so no real surprise. :P

Cheers,

Greg



Greg Lipschitz | Director | The Summit Group
E: Greg at thesummitgroup.com.au  W: www.thesummitgroup.com.au
The Summit Group (Australia) Pty Ltd | P: 1300 049 749 | Level 1, 39 Railway Road, Blackburn  VIC  3130
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-----Original Message-----
From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Nathan Day
Sent: Tuesday, 2 December 2014 11:40 AM
To: ausnog at lists.ausnog.net
Subject: Re: [AusNOG] Telstra NBN Woes in Toowoomba

Hi Tim

I¹ve tried DSCP of 0 with the VPN as well and no change.

Frustrating the hell out of me.

Speaking to someone else in the industry, they suggested that it might be related to a reset Telstra did over the weekend on layer2 services after experiencing a huge number of faults with after stormageddon in Brisbane last week.

Cheers
Nathan

On 2/12/2014 9:12 am, "Tim Warnock" <timoid at timoid.org> wrote:

>> -----Original Message-----
>> From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of
>> Nathan Day
>> Sent: Tuesday, 2 December 2014 9:04 AM
>> To: ausnog at lists.ausnog.net
>> Subject: [AusNOG] Telstra NBN Woes in Toowoomba
>>
>> Anyone having issues with NBN fibre provided by Telstra in Toowoomba?
>> After the weekend, customers with a non-telstra VoIP service on
>> Telstra NBN are having issues with SIP trunks being dropped.
>> Remarking DSCP values to 10 helps, but not in all cases.
>
>If you remark to zero does it fix it? Also try the same for your VPN
>(make sure it's not trying to use its own DSCP settings).
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