Response to the liaison on Y.RACF-DistribMPLS "Distributed RACF Architecture for MPLS Networks"
|From||IETF MPLS WG (Loa Andersson)|
|To||ITU-T SG13 (email@example.com)|
|Cc||Ross Callon, David Ward, Stewart Bryant, firstname.lastname@example.org, Georges Sebel, email@example.com|
|Response firstname.lastname@example.org, email@example.com|
|Technical contact||Loa Andersson, George Swallow|
|Deadline||2008-07-25 Action Taken|
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, George Swallow and Loa Andersson, MPLS wg co-chairs