Subject: [Supa] comments on "draft-contreras-supa-yang-network-topo-02"

From: Ying Cheng <[email-masked]>
Date: Fri, 30 Jan 2015 18:41:13 +0800

Hi all,

After reading the latest draft of YANG model for Network Topologies (draft-contreras-supa-yang-network-topo-02), I have several questions as follows.

1.In the introduction part, There is a sentence :"Now the "layer" property has four values: optical [editor's note: wireless is also important, and will be taken into account later], physical, datalink and control plane including IP and MPLS can be extended to layer 4,5 and 7." 
However, in Fig.1, the plysical topology model includes optical , copper, hub, etc.. What is the relationship between physical and optical mentioned as independent value of "layer" property?

2.Both in introduction part and Fig. 1, the control plane is mentioned as one layer. What's the exact meaning of it?

3.In the Topology paragraph of 4.2, the sentence "Also, hierarchical fashioned controller architecture is equipped to handle multi-controller to one topology case. " is confusing. What do your mean by "multi-controller to one topology"?

Additionally, in the 5th paragraph on page 2, "The detail procedure of how to use the topology information when mapping the service to device can be found in SUPA mapping draft. " It is proposed to provide the latest mapping draft title.

Thanks and best regards,
Ying

2015-01-30 

Ying CHENG  程莹
China Unicom Network Technology Research Institute 中国联通网络技术研究院
Tel: +86-10-68799999-7702
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