Re: [manet] I-D Action: draft-ietf-manet-dlep-da-credit-extension-04.txt

Lou Berger <> Fri, 02 March 2018 23:01 UTC

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From: Lou Berger <>
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Subject: Re: [manet] I-D Action: draft-ietf-manet-dlep-da-credit-extension-04.txt
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There are a few items outstanding on the credit draft:

I received an offline comment that I think should be noted in the 
draft.  The comment was that it might not be obvious that since 
queues/credit windows can be shared among (disjoint) sets of endpoints, 
that sending to one destination in a set reduces the available capacity 
to other destinations.  I'll propose some text on this shortly.

There are also two questions that are still open:

(A) does the WG want to keep the document as is or break apart the 
current document into two documents?

- the first being the credit window and generic traffic classification  
definition and the second being the DA/DSCP extension and traffic 
classification sub-DI

I can't speak for my co-authors, but I'm okay proceeding either way, but 
now is the time to decide.

(B) finally, does the WG want to take the notional Ethernet/PCP based 
traffic classification which was added as an appendix, see [1], to 
sanity check the current functional decomposition and make it a full 
blown Ethernet/PCP extension

my personal preference is to do this, it's not much effort and seems 

any thoughts and/or comments would be appreciated.

I also look forward to discussing this in London (in the joint meeting 
with ccamp).



On 3/1/2018 6:03 PM, Lou Berger wrote:
> Hi,
> This version completes the updates discussed at the last IETF. The
> notable changes are:
> - Separate credit control from traffic classification
> - Ensure traffic classification is extendable to other flow
> identification methods
>       - This included definition of a Notional Ethernet Credit Window
> Traffic Classification (in an appendix) as a sanity check on separation
> of mechanisms.  This can be removed at some point or moved to it's own
> document/extension.
> - Add a management considerations section
> - other minor corrections/fixes.
> - One note, Traffic Class. Identifier (TID) was not changed as discussed
> at IETF 100
> Lou
> On 3/1/2018 4:45 PM, wrote:
>> A New Internet-Draft is available from the on-line Internet-Drafts directories.
>> This draft is a work item of the Mobile Ad-hoc Networks WG of the IETF.
>>           Title           : DLEP DiffServ Aware Credit Window Extension
>>           Authors         : Bow-Nan Cheng
>>                             David Wiggins
>>                             Lou Berger
>> 	Filename        : draft-ietf-manet-dlep-da-credit-extension-04.txt
>> 	Pages           : 26
>> 	Date            : 2018-03-01
>> Abstract:
>>      This document defines an extension to the DLEP protocol that enables
>>      a DiffServ aware credit-window scheme for destination-specific and
>>      shared flow control.  The extension is logically composed of two
>>      mechanisms.  The first provides credit window control, the second
>>      identifies how flows are identified and mapped to a credit window.
>> The IETF datatracker status page for this draft is:
>> There are also htmlized versions available at:
>> A diff from the previous version is available at:
>> Please note that it may take a couple of minutes from the time of submission
>> until the htmlized version and diff are available at
>> Internet-Drafts are also available by anonymous FTP at:
>> _______________________________________________
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