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

"Seil Jeon" <seiljeon@gmail.com> Fri, 22 September 2017 00:31 UTC

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From: Seil Jeon <seiljeon@gmail.com>
To: 'Do Truong Xuan' <thespring1989@gmail.com>
Cc: dmm@ietf.org
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Date: Fri, 22 Sep 2017 09:31:49 +0900
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Subject: Re: [DMM] FW: I-D Action: draft-ietf-dmm-deployment-models-01.txt
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Hi Xuan,

 

 

Thanks. Please have a look inline.

 

 

Regards,

Seil Jeon

 

From: Do Truong Xuan [mailto:thespring1989@gmail.com] 
Sent: Thursday, September 21, 2017 5:38 PM
To: Seil Jeon
Cc: dmm@ietf.org
Subject: Re: [DMM] FW: I-D Action: draft-ietf-dmm-deployment-models-01.txt

 

Please see inline, 

 

On Wed, Sep 20, 2017 at 4:12 PM, Seil Jeon <seiljeon@gmail.com <mailto:seiljeon@gmail.com> > wrote:

Hi Xuan,

 

Thanks for your comments.

Please see inline.

 

Regards,

Seil Jeon

 

 

From: Do Truong Xuan [mailto:thespring1989@gmail.com <mailto:thespring1989@gmail.com> ] 
Sent: Wednesday, September 20, 2017 12:19 AM
To: seiljeon@gmail.com <mailto:seiljeon@gmail.com> ; dmm@ietf.org <mailto:dmm@ietf.org> 
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 

 ==> IMO, I don't see any relations between NSH classifiers and mobility management

[SJ] It was given to describe the functionality of DPA and DPN.  But I see your concern. We’ll address it in a next update.

 

+ 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.

 ==> OK

+ 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”. 

 ==> maybe H-DPA and A-DPN are distributed but how about control plane, you mean flat arch is only for dataplane

[SJ] Doesn’t necessarily “only”. But enough to call it.

 

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,





 

-- 

Truong-Xuan, Do

PHD Candidate

DCN Lab, Soongsil University

(+82) 10 4473 6869

xuan@dcn.ssu.ac.kr <mailto:xuan@dcn.ssu.ac.kr>