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More comments/questions on DS-TE solution draft
Hi! Here are few additional comments related to the DS-TE solution
draft.
1. Probably the draft should explicitly spell out that there has to be a
well-defined relationship between the BCs and LOMs, to make the
whole thing work.
Specifically, for the "Russian Doll" BC model, the draft should
spell out the exact relation between CTs/BCs & LOMs.
some thing like:
a. Count : Total number of LOMs == Total number of BC/CT??
b. Value : LOM[m] < LOM[n] , where m > n ?? or
BCm * LOM[m] < BCn * LOM[n] , where m > n ??
2. It may not be bad idea to rename the term "Class-Type" as
"Bandwidth_Class" [Bw_Class/Bw_pool/Any term that is little
more descriptive.].
Reasons:
a) The term Class-Type is non-descriptive.
b) In future, people may un-intentionally misuse (overload)
the term.
3. It will be helpful, if the draft spells out any domain level restrictions
/recommendations that the user should keep in mind. For example:
a) Is it necessary for the number of CTs to be same in
all the links of all LSRs in the DS-TE domain ?
b) Does the CT identifier have to be consecutive in nature ?
c) Is it necessary that _all_ the LSRs in the domain MUST
support DS-TE.
if it is not necessary then :
i) What should be the behavior if a LSR that
does not support the signaled (or inferred) CT ?
4. How can a LSR distinguish between the DS-TE and non DS-TE
bandwidth advertisement (DS-TE re-uses the existing constructs
to advertise the available bw in a CT+priority basis) ?
Thanks,
sanjay