[AusNOG] Telstra NBN - DSCP Filtering

[Joseph Goldman]

Have heard the same, and it is common knowledge on Whirlpool forums when 
people have this problem, DSCP is the first culprit.

I have only seen the complaint about Telstra/Bigpond services myself, so 
yes I do believe it may be them implementing it.

On 07/08/15 14:02, Dino Sosic wrote:
>
> Hi guys,
>
> Something I discovered after an extensive tshooting. Telstra service 
> on NBN ( TID Service ) actually drops all non 0 marked DSCP markings. 
> They say it’s actually NBN doing that, but I do not see this on other 
> providers. I had phones trying to register across the IPsec through 
> that NBN, that were failing to do so as long as they were sending 
> marked packets (phones mark it EF by default ). Once I remarked the 
> voice traffic to DSCP 0(default), the SIP registered immediately. Some 
> heavy traffic manipulation or what? J So much for unhindered transport 
> from A to B.
>
> Interesting part was also, even though the voice traffic is inside the 
> ESP packet, those packets get dropped, I am guessing due to size+DSCP 
> marking copied to ESP packet. Anyone seen this before?
>
> Dino
>
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