Re: Comcast Network Peer Survey on DSCP/ECN for L4S

[Jared Mauch]

This seems to be missing some of the reasons/why things are remarked, perhaps 
it would be wise to bring some of the people interested in this to the various 
vendor-specific lists or such?

For example, for some hardware types, enabling any sort of rate shaping at all 
will rewrite the DSCP values, even for packets that do not traverse the shaped 
interfaces.

- Jared

> On Jun 10, 2022, at 9:31 AM, Livingood, Jason via NANOG  
> wrote:
> 
> Hi – Comcast is working on the implementation of ultra-low latency 
> networking, leveraging the IETF’s upcoming L4S standard. This standard will 
> require passing ECN and DSCP markings across network boundaries. As a result, 
> we are interested in your perspective on this and in how you handle markings 
> today. We have a short survey that should only take a few minutes to 
> complete. Take the survey at https://forms.office.com/r/vGb0LUXfS1
>  
> While any network operator is welcome to take this, we are particularly 
> interested in any networks that are directly interconnected with us today.
>  
> Thank you!
> Jason Livingood
> Comcast – Technology Policy & Standards
> jason_living...@comcast.com
>  
> PS – Apologies if any of you get a duplicate of this request via other 
> channels.

Re: Comcast Network Peer Survey on DSCP/ECN for L4S

[Dave Taht]

I would argue that question 9 needs an option of "Both".

Secondly, two additional good questions to ask would be: are the ECN
values presently being treated as RFC3168?

Are the ECN values being modified by any AQM implementations (WRED,
FQ_CODEL, etc) on any switch or router in transit?

Comcast Network Peer Survey on DSCP/ECN for L4S

[Livingood, Jason via NANOG]

Hi – Comcast is working on the implementation of ultra-low latency networking, 
leveraging the IETF’s upcoming L4S standard. This standard will require passing 
ECN and DSCP markings across network boundaries. As a result, we are interested 
in your perspective on this and in how you handle markings today. We have a 
short survey that should only take a few minutes to complete. Take the survey 
at https://forms.office.com/r/vGb0LUXfS1

While any network operator is welcome to take this, we are particularly 
interested in any networks that are directly interconnected with us today.

Thank you!
Jason Livingood
Comcast – Technology Policy & Standards
jason_living...@comcast.com



PS – Apologies if any of you get a duplicate of this request via other channels.