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IDProjectCategoryView StatusDate SubmittedLast Update
0008121IFA011 - VNF Packaging Spec[NFV Specifications] Clarificationpublic15-09-2022 08:0409-11-2022 11:26
ReporterSujeet Banerjee 
Assigned Tobhyrraju 
Prioritynormal 
StatusresolvedResolutionno change required 
Product Version4.2.1 
Target VersionFixed in Version 
Summary0008121: "VnfIndicator" being defined in both "VNFD" and "VnfDf" information Elements; Ambiguity over referencing
DescriptionWhat is the behavior of MANO, when the same VnfIndicator information is present in both VnfDf and Vnfd Information Elements?
- Are the consumers, subscribing to the Indicator Notification, supposed to get double notifications?
- Or, is one of the VnfIndicator definitions going to have an "Overriding Effect"; say, VnfDf.vnfIndicator supersedes Vnfd.vnfIndicator (or vice-versa)?
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-  Notes
(0016243)
Bruno Chatras (reporter)
20-09-2022 15:12

 My assumption is that Vnfd.vnfIndicator contains a list of VNF indicators applicable to any DF (*) while VnfDf.vnfIndicator contains a list of VNF indicators that are specific to a DF.
(*) Perhaps this should be stated explicitly in Table 7.1.2.2-1.
(0016244)
Sujeet Banerjee (reporter)
21-09-2022 09:09

 Still unanswered -
1. "what if both Vnfd and DF define with the same indicatorId and/or indicator_name?", Will one override the other?
2. What will be the response returned by the VNFM for GET '/indicators/{vnfInstanceId}/{indicatorId}'
3. Will the subscriber get multiple notifications for the same type of change?
(0016245)
Bruno Chatras (reporter)
21-09-2022 09:17

 1. This does not make sense and should be forbiden. An indicator is either globally applicable all DFs or specific to a DF. Indicator names shall be unique within the scope of the VNFD.
2. I assume you mean "returned by the VNF", right? The VNF will return the information associated to the IndicatorId.
3. No
(0016246)
Sujeet Banerjee (reporter)
22-09-2022 06:26

 Ok, got it.

However, under what circumstances would a VNF-vendor need to define an indicator specific to a DF, given the same could be done through VNF-specific indicator anyways? IFA007 and IFA008 do not distinguish whether a vnfIndicator is specific to a DF or a VNF (afterall, the subscription request filter takes an indicator-Id). Am I missing any usecase?
(0016247)
Bruno Chatras (reporter)
23-09-2022 10:44

 Let's take as an example a VNF that has 3 VNFCs (A,B and C) and 2 DFs.
- DF1 (Basic functionality): with VNFC A & B
- DF2 (Extended Functionality): with VNFC A,B & C
VNF indicators sent by VNFC A & B are applicable to all DFs while VNF indicators sent from VNFC C are specific to DF-2.
(0016259)
bhyrraju (developer)
26-10-2022 11:49

 Checked tables Table 7.1.2.2-1 (VNFD). As Bruno indicated, the vnfIndicator in the table is applicable at VNFD level (default for any Deployment flavours).
The description says "Declares the VNF indicators that are supported by this VNF".

If there are specific requirements for a Deployment Flavour, they are represented in "deploymentFlavour" attribute (Content VnfDf) in the VNFD (Table 7.1.2.2-1).
In this case, a new set of vnfIndicators can be defined specific to that deployment flavour. Refer to Table 7.1.8.2.2-1, these are the indicators specific to the deployment flavour.
The description in this table says "Declares the VNF indicators that are supported by this VNF (specific to this DF)".

- Issue History
Date Modified Username Field Change
15-09-2022 08:04 Sujeet Banerjee New Issue
20-09-2022 15:12 Bruno Chatras Note Added: 0016243
21-09-2022 09:09 Sujeet Banerjee Note Added: 0016244
21-09-2022 09:17 Bruno Chatras Note Added: 0016245
22-09-2022 06:26 Sujeet Banerjee Note Added: 0016246
23-09-2022 10:44 Bruno Chatras Note Added: 0016247
26-10-2022 11:38 bhyrraju Assigned To => bhyrraju
26-10-2022 11:38 bhyrraju Status new => assigned
26-10-2022 11:49 bhyrraju Note Added: 0016259
09-11-2022 11:26 bhyrraju Status assigned => resolved
09-11-2022 11:26 bhyrraju Resolution open => no change required
15-12-2022 09:18 Sujeet Banerjee Issue cloned: 0008168

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