RE: Establishing E / L- LSPs with Bandwidth Reservation

Sasha, Sumit,

>> > >If yes, then how should one decide from which of the=20
>> corresponding=20
>> > >PSCs' BW one should subtract the BW required for that E LSP?
>> >=20
>> > You can't. But this mode should only be used when you don't need to
>> > differentiate between the BW of different PSCs in the E-LSP.=20
>> > For example when the E-LSP carries AF1x and AF2x.
>> >=20
>> I do not remember such a recommendation in RFC 3270 (did I=20
>> miss it?),=20
>> but it definitely looks like the right thing to do.
>> If it is really missing in 3270, it's a pity since this is quite an=20
>> important issue.
>> >

Details of the operations of bandwidth reservations in the context of
MPLS Diff-Serv are beyond the scope of RFC3270. However, those are
within the scope of "Diff-Serv-aware MPLS Traffic Engineering" (DS-TE)
developed in the TEWG.
In RFC3564 "Requirements for Support of Differentiated Services-aware
MPLS Traffic Engineering", you may be interested in section "1.3 Mapping
of traffic to LSPs" which discusses the options of how "classes of
services" may be split/grouped over L-LSPs/E-LSPs.

Cheers

Francois

>> > -Shahram
>> >=20
>> > >
>> > >Please help me understand.
>> > >
>> > >Regards,
>> > >Sumit
>> > >
>> > >
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>> >=20
>>=20