Re: [DMM] FW: I-D Action: draft-ietf-dmm-deployment-models-01.txt

[<[e-mail]>]

Dear Seil,
Finally I remembered that I promised a review. I am sorry for the delay!
Overall I think the draft is well written and useful. Thanks!
Some nits have been detected already by Xuan … in addition: ‘seperated’ should be replaced by ‘separated’ and ‘and where as’ by simply ‘whereas’.
I would recommend to give the explicit reference where NSH is mentioned and also introduce the acronyms MC and RC for Mobility and Routing Controller, respectively, to improve readability.
Furthermore I wonder whether MC and RC denoted as DMM functions in the table Figure 1 are not included in the mapping table Figure 2. E.g. I would think in 3GPP they are located at MME-CPA and -CPN …
What do you think?
Thanks!
Best Regards
Dirk

From: dmm [mailto:[e-mail]] On Behalf Of Seil Jeon
Sent: Mittwoch, 20. September 2017 09:12
To: 'Do Truong Xuan'
Cc: [e-mail]
Subject: Re: [DMM] FW: I-D Action: draft-ietf-dmm-deployment-models-01.txt

Hi Xuan,

Thanks for your comments.
Please see inline.

Regards,
Seil Jeon


From: Do Truong Xuan [mailto:[e-mail]]
Sent: Wednesday, September 20, 2017 12:19 AM
To: [e-mail]<mailto:[e-mail]>; [e-mail]<mailto:[e-mail]>
Subject: Re: [DMM] FW: I-D Action: draft-ietf-dmm-deployment-models-01.txt



Dear Seil !

I have some comments on deployment architecture document as follows:



+ In the Figure 1, the authors mentioned about primitive function "NSH classifier" supported by H-DPA or A-DPN, could you elaborate more how this service could support DMM.

NSH classifiers (for SFC) will at data-plane entities, i.e., DPA and/or DPN, which will be deployed in a distributed manner.

For the functionality of DPA and DPN in terms of SFC, you can find what context data is maintained by the FPC Agent at 4.3.2.1. and 4.3.2.2. in https://tools.ietf.org/html/draft-ietf-dmm-fpc-cpdp-08



+ Other service primitive such as IP management, IP anchoring, mobility controller deserve more explanation to better understand the DMM functions

IP management means IP address assignment and management. The mobility controller itself is given to call a control entity which can be different depending on the model introduced. In Model-3, we call the combined home-CPA and access-CPN a mobility controller. In the on-demand control plane orchestration mode, it is called an orchestrator of all the mobility-related control-plane and data-plane anchors/nodes.



+ In Section 4.3, model 3, IMO this is centralized architecture for signaling and distributed for data plane functions similar to SDN architecture. However, in description text, authors  wrote "this is a flat architecture" --> need more elaboration

You need to look at the relationship between the access node and home-DPA for the meaning of “flat architecture”.



Some other spelling errors:

+ in Section 3.2.1, homd-dpa --> home-dpa

Wow! Will be fixed in a next update.



 + Section 3.2.5, DMM function --> DMM functions

O.K


BRs,