Re: Call for consensu on admission priority changes in QSPEC

Hi all

I support option 3.

Best regards,
Georgios


>>
>>> -----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
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>>> https://www.ietf.org/mailman/listinfo/nsis
>>>
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