Re: [ippm] TWAMP Service Monitoring Extension

[Qin Wu <[e-mail]>]

Hi,Sri:

Thanks for your update to these two drafts, I have read these two drafts and feel the mechanisms proposed in this draft and the metrics defined in this draft are very useful in

Network optimization and can also help us provide better network planning and dimension. The most important is this draft provide value added service

Performance monitoring which complementary to network performance monitoring and can help us measure end to end network performance and provide better network visibility.



Here are few comments/suggestion to first document: draft-spv-ippm-monitor-methodology-services-kpi-01

1.If I read correctly, these two drafts below, one is about TWAMP extension for Service KPIs Monitoring, the other is about Metric Definition for Service KPIs Monitoring. In the first draft, a new framework is proposed for service KPIs monitoring, which adopts the similar logical model for TWAMP. I would suggest the title of draft-spv-ippm-monitor-methodology-services-kpi-01 can be rephrased a little bit to reflect the difference as I mentioned above.

2.I think this draft more focuses on TWAMP protocol extension for service KPIs monitoring while draft-spv-ippm-monitor-implementation-services-kpi-01 focus on metric definition, the methodology should be part of the draft-spv-ippm-monitor-implementation-services-kpi-01, here is the proposed change to the abstract

“

Monitoring of Service KPIs in the

   service plane with in a network play a vital role in

   network optimization and Network planning and dimension.



In this document, we are introducing a new method to calculate services KPIs and

   Performance metrics in the network using TWAMP protocol.  Services here is ranging

   from Layer 4 to Layer 7 services.  Some of the examples are HTTP

   based services, Traffic load balancer, DPI, Video caching, real time

   streaming and IPSec.  The KPIs MAY be service latency, liveliness of

   an application, number of flows and sessions per service, load

   balancer statistics.



   This draft proposes a TWAMP protocol extension for service level parameters monitoring in the

real network. These service level parameters can    be used to calculate service KPIs using

Metric proposed in draft-spv-ippm-monitor-implementation-services-kpi. Some of

   the existing fields in the TWAMP protocol is extended to support new modes in the TWAMP

   protocol for calculating these KPIs. A set of new messages are added in

   the control protocol between TWAMP client (session sender) and the

   TWAMP server (session reflector).



”

3.Introduction section, paragraph 3:

Do you require DPI, SFW, CGNAT support TWAMP protocol or TWAMP test message exchange? What role DPI play in the logical model? TWAMP server or session reflector?

4.Section 2, last paragraph:

OLD TEXT

“

The actual method to calculate the KPIs is discussed in a separate

   draft on implementation



”

NEW TEXT:

“

The actual method to calculate the KPIs is discussed in a separate

   Draft [I.D-spv-ippm-monitor-implementation-services-kpi]

”

5.Section 3, 3rd paragraph:

I believe the service messages KPI-Monitor-IND and KPI-Monitor-ACK are exchanged between

Session Sender and Session Reflector instead of between Control-Client and Session reflector

unless you require Control-Client is collocated with Session Sender and TWAMP Server is

collocated with Session Reflector?

6.Section, 3 rd paragraph, last sentence

It is not clear which two sets of messages you are referred to, suggest the following change

OLD TEXT

“

These two sets of

   messages will be repeated for each of the services that Server can

   monitor.



”

NEW TEXT

“

This pair of two messages will be repeated for each of the services that Server can

   monitor.

”

7. section 7

s/ anthenticated/ authenticated



Here are a few comments on the second draft-spv-ippm-monitor-implementation-services-kpi

1.Suggest a few change to the 1st paragraph of the abstract

OLD TEXT:

“

We are using a new method to calculate services KPIs and metrics in

   the network using TWAMP protocol.  This draft outlines the

   implementation of the service KPIs and there use cases in the service

   plane in the network.  The KPIs discussed in this draft include

   Service Latency and Application Liveliness detection.

”

NEW TEXT:

“

We are using a new method to calculate services KPIs and performance metrics in

   the network using TWAMP protocol.  This draft Defines the service KPIs Metrics and outlines use cases in the service

   plane for these metrics in the network.  The KPIs discussed in this draft include

   Service Latency and Application Liveliness detection.



”

2.Section 1, 1st paragraph

Does this draft require update RFC5357 since it update existing TWAMP-TEST packet format?



3.Section 2.2

OLD TEXT:

“

Metric Description: This indicates the total latency introduced by

   the service for a data packet which is undergoing that service.

   Please note that the latency calculation in service agnostic.





”

NEW TEXT:

“

Metric Description: This indicates the total latency introduced by

   the service for a data packet which is undergoing specific treatment offered by that service node in the path.

   Please note that the latency calculation in service agnostic.



”

4.Section 5.

s/ anthenticated/authenticated



-Qin
发件人: ippm [mailto:[e-mail]] 代表 Srivathsa Sarangapani
发送时间: 2016年6月28日 10:05
收件人: IETF IPPM WG
抄送: Peyush Gupta
主题: [ippm] TWAMP Service Monitoring Extension

Hi All,

New versions of the TWAMP Service Monitoring extension drafts are being posted after addressing the comments given by Al, Greg, Nalini, Qin and others in the last IETF meeting.
We request you all to please go through the documents and reply back with your comments/suggestions.
The documents are in the below path:

Name:         draft-spv-ippm-monitor-methodology-services-kpi
Revision: 01
Title:        Monitoring Service KPIs using TWAMP - Methodology
URL:            https://www.ietf.org/internet-drafts/draft-spv-ippm-monitor-methodology-services-kpi-01.txt
Status:         https://datatracker.ietf.org/doc/draft-spv-ippm-monitor-methodology-services-kpi/
Htmlized:       https://tools.ietf.org/html/draft-spv-ippm-monitor-methodology-services-kpi-01
Diff:           https://www.ietf.org/rfcdiff?url2=draft-spv-ippm-monitor-methodology-services-kpi-01

Name:         draft-spv-ippm-monitor-implementation-services-kpi
Revision: 01
Title:        Monitoring Service KPIs using TWAMP - Implementation
URL:            https://www.ietf.org/internet-drafts/draft-spv-ippm-monitor-implementation-services-kpi-01.txt
Status:         https://datatracker.ietf.org/doc/draft-spv-ippm-monitor-implementation-services-kpi/
Htmlized:       https://tools.ietf.org/html/draft-spv-ippm-monitor-implementation-services-kpi-01
Diff:           https://www.ietf.org/rfcdiff?url2=draft-spv-ippm-monitor-implementation-services-kpi-01


—
Regards,
Vathsa