Re: Call for consensu on admission priority changes in QSPEC

I also think option 3 is preferred.
Xiaoming
Martin Stiemerling wrote:
> (chair's hat off)
> 
> I'm also for option 3.
> 
>   Martin
> 
> [email protected]   <== NEW ADDRESS
> 
> NEC Laboratories Europe - Network Research Division
> NEC Europe Limited | Registered Office: NEC House, 1 Victoria Road, London W3 6BL | Registered in England 2832014  
> 
>> -----Original Message-----
>> From: [email protected] [mailto:[email protected]] On 
>> Behalf Of Martin Stiemerling
>> Sent: Thursday, March 13, 2008 11:42 AM
>> To: nsis
>> Subject: [NSIS] Call for consensu on admission priority 
>> changes in QSPEC
>>
>> Hi all,
>>
>> There have been discussions with respect to QoS NSLP QSPEC 
>> Template (draft-ietf-nsis-qspec-19.txt) on the nsis mailing 
>> list, offline between involved parties, and also during the 
>> NSIS session here at the IETF#71 in the NSIS session (see minutes).
>>
>> The QSPEC document shares the IANA registries for RPH 
>> priority and the admission priority with these drafts out of 
>> the DIME and TSVWG:
>> - draft-ietf-dime-qos- parameters
>> - draft-ietf-tsvwg-emergency-rsvp
>>
>> While the IANA registry for the RPH priority has not been 
>> disputed, the admission priority has been. 
>>
>> Therefore we run a call for consensus on these three choices 
>> for the admission priority in the QSPEC. Note well, that the 
>> decision of this can have an impact to the still running IETF 
>> last call for draft-ietf-tsvwg-emergency-rsvp.
>>
>>
>>
>> Please hum on the NSIS list for one of the three options 
>> listed below until Monday, March 17th, 12pm UCT. This is to 
>> confirm the humming of the NSIS WG during the NSIS session at 
>> the IETF meeting.
>>
>> 1) Keep Y.2171 admission prioty in draft-ietf-nsis-qspec-19.txt as is:
>>
>> 2) Change in draft-ietf-nsis-qspec-19.txt to admission 
>> priority as in draft-ietf-tsvwg-emergency-rsvp-05.txt and 
>> remove Y.2171 admission prioty;
>>
>> 3) Keep Y.2171 admission priority and add admission priority 
>> as in tsvwg-rsvp-emergency to draft-ietf-nsis-qspec-19.txt. 
>>
>>
>>
>>
>> For choice 3) these changes are currenlty proposed:
>>
>> 1) the emergency-RSVP draft should pretty much stay the same. 
>>  There is no "L" bit addition, and its "Admission Priority" 
>> field has local significance within a domain, and no 
>> pre-existing values are defined for it, nor is there any 
>> associated IANA registry assigned to it.
>>
>> 2) The QSPEC draft will have a similar "Admission Priority" 
>> field with the same characteristics as that defined above in (1).
>>
>> 3) The QSPEC draft will add a new field, titled "Y.2171 
>> Admission Priority", that will be associated with the current 
>> 3 values defined in the Y.2171. This field is considered 
>> globally significant on an end- to-end basis.  Note that the 
>> emergency-RSVP document will NOT have this additional field.
>>
>> 4) Given the presence of two admin priority fields for the 
>> QSPEC, additional rules are added to clarify their 
>> application and usage for NSIS domains.
>>
>> 4.1)  if the source domain does NOT support Y.2171, then it 
>> sets a locally significant value in the "Admission Priority" 
>> field, and places all "1"s in the "Y.2171 Admission Priority" 
>> to indicate that this field is to be ignored.  Downstream 
>> domains MUST NOT alter the value of the "Y.2171 Admission 
>> Priority"  field.
>>
>> 4.2)  if the source domain DOES support Y.2171, then a value 
>> (eg, 0, 1, or 2) is placed in the "Y.2171 Admission Priority" 
>> field AND the "Admission Priority" field.  Downstream NSIS 
>> domains MUST NOT change the value in the "Y.2171 Admission 
>> Priority" field so that end-to-end consistency is maintained. 
>>  Downstream routers act upon the value placed in the 
>> "Admission Priority" field.
>>
>> 4.2.1)  Furthermore, if a downstream NSIS domain does not support Y. 
>> 2171, it MAY place a locally significant different value in 
>> the "Admission Priority" field, which is used by downstream 
>> routers within its domain.  Subsequent downstream domains 
>> that do support Y.2171 make sure that the "Admission 
>> Priority" field contains the same value as the "Y.2171 
>> Admission Priority" field.
>>
>>
>> Thanks,
>>
>>   Martin
>>
>> [email protected]   <== NEW ADDRESS
>>
>> NEC Laboratories Europe - Network Research Division NEC 
>> Europe Limited | Registered Office: NEC House, 1 Victoria 
>> Road, London W3 6BL | Registered in England 2832014 
>> _______________________________________________
>> nsis mailing list
>> [email protected]
>> https://www.ietf.org/mailman/listinfo/nsis
>>
> _______________________________________________
> nsis mailing list
> [email protected]
> https://www.ietf.org/mailman/listinfo/nsis