[mpls] Proposed response to the liaison from ITU-T SG13

[Loa Andersson <loa at pi.se>]

Working Group,

we have received a liaison from ITU-T SG13.
https://datatracker.ietf.org/liaison/417/
Below a proposed response is included. Please send comments
to the working group mailing list no later than April 2.

/Loa

------  proposed liaison response  ---------------------

Thank you for your liaison from your Seoul meeting on
Y.RACF-DistribMPLS "Distributed RACF Architecture for
MPLS Networks".

This work is of interest to the MPLS Working
Group.  Please keep us informed as the work progresses.

Upon a cursory review we have identified some points where
clarification would be beneficial to our understanding.

Our reading is that ITU-T 4/13 has defined and Session
Border Controller Connection Admission Control function
as a gateway connected with an MPLS LER and in the so called
distributed environment it appears that this function is
embedded in the ingress MPLS LER.


There are several points where we would greatly appreciate your
clarification:

1. Describe the process by which the SBC gateway determines
    QoS and priority requirements by the so called "Policy
    Decision and Functional Entity" [PD-FE]?


2. Once the PD-FE QoS and priority requirements have been established
    by the PD-FE, what is the process by which they are then
    communicated to the MPLS LER?

3. Describe the expected behavior by the MPLS LER, e.g.
    the actual mechanism for tunneling.


4. What is meant by a PE-FE function as pointed out on
    page 4 of this document, eg. that an Ingress LER will also
    possess SBC gateway capabilities?

5. What extensions of DS-TE do you expect to have
    if any to support the PE-FE capability?


We look forward to your reply.

Thank you,

[To be signed by the wg chairs]





-- 
Loa Andersson

Principal Networking Architect
Acreo AB                           phone:  +46 8 632 77 14
Isafjordsgatan 22                  mobile: +46 739 81 21 64
Kista, Sweden                      email:  loa.andersson at acreo.se
                                            loa at pi.se
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