Re: [tsvwg] residential broadband BCP PHB and CP treatment Re: CC/bleaching thoughts for draft-ietf-tsvwg-le-phb-04

[Brian E Carpenter <[e-mail]>]

Mikael,

> If CP == 1 goto queueLE;

Sure, if IANA assigns the code point that the draft requests.

> I would 
> like whatever we come up with to be RFC8325 compatible and at least not 
> conflicting with it.

If you mean 8325 *as updated by draft-ietf-tsvwg-le-phb* we are fine.
But it will be very important to get that update into everybody's head.

   Brian


Regards
   Brian Carpenter



On 20/04/2018 16:47, Mikael Abrahamsson wrote:
> On Fri, 20 Apr 2018, Brian E Carpenter wrote:
> 
>> How on earth can an operator blindly map CS1 to LE? Maybe the source
>> means CS1 as defined in RFC2474.
> 
> Lots of maybes in this area it seems. RFC8325 says to send CS1 to 
> background queue.
> 
>> Unless you have an explicit agreement with the source, there is no correct
>> answer. Remarking CS1 to default is somewhat closer to "first, do no harm",
>> since it either slightly downgrades traffic intended for CS1 or slightly
>> upgrades traffic intended for LE but falsely labelled as CS1.
> 
> Ok, so just to make things perfectly clear. I am trying to create a BCP 
> for residential broadband for PHB and CP treatment. This means BYOD, no 
> contracts, no knowledge. This includes mobile, wifi, wireline etc. I would 
> like whatever we come up with to be RFC8325 compatible and at least not 
> conflicting with it. My goal is to go to the operator community and try to 
> get as wide adoption of this as possible. If I succeed, this will be the 
> new default behaviour for residential broadband access.
> 
> So, from this discussion it seems to me that what we would like to happen 
> that would do least harm is this pseudocode.
> 
> CP is decimal representation of diffserv CP 0 to 63.
> 
> If CP => 0 then pass; # do not bleach anything
> 
> The PHB is set up like this:
> 
> If CP == 0 goto queueBE;
> If CP == 1 goto queueLE;
> If CP => 2 goto queueRest;
> 
> The queues are set up to drain with current ratios:
> 
> queueBE 	10
> queueRest 	10
> queueLE 	1
> 
> .. or something along those lines, meaning queueLE gets ~5% of the 
> capacity when the other queues are full.
> 
> If operator wants to bleach, then pseudocode changes to:
> 
> If CP == 1 then pass; # allow LE
> If CP => 2 then set CP = 0; # set 2-63 to 0
> 
> The PHB is set up like this:
> 
> If CP == 1 goto queueLE;
> goto queueBE;
> 
> The queues are set up to drain with current ratios:
> 
> queueBE 	20
> queueLE 	1
> 
> This sums up into roughly same thing but just 2 queues and LE gets ~5%.
>