how Service impact works.

[ibsm]

I went through the document links, i could not understand how exactly it works?

Suppose We have designed one service Map and created Application service with multiple entry point. Suppose we have 3 web servers in cluster, and we want to raise P1 if we receive web server not working alert from all 3 web servers, if 2 web servers are stopped then P2 and so.
does system generate new alert if the application service in the service map is getting impacted?

Kindly let me know in detail How can we configure this?

[ibsm]

Any suggestions on this

[Robin J_]

Hi ibsm,
What I would strongly recommend here is to do Event Management Fundamentals either ITL or On-Demand since those labs covered the impact pretty good. 

"does system generate new alert if the application service in the service map is getting impacted?"
How it works is: Event Rules create Alerts
Impact = If the Service Map turns orange/red and where it "lights up" if you have a 3 cluster server(s) then if just 1 of the CI's have an Alert the impact should probably not turn the whole "Service" into Critical state (red). 

The best for this is to do it hands-on which you do in the Event Management course. I learned more from that than reading up about it in docs. 

But in short: Alerts bind to CI, impact decides how much of the service map should get "flagged/lighted up" - Not the best choice of words, but hope that made sense.

Kind regards,
Robin

[ibsm]

Thanks @Robin J_ . Appreciate your response.

Sure I will complete suggested course.

One quick question, I have seen in other monitoring tools that In case of service map, if there is impact on the application service CI then they generate new/extra/seperate alert which will says that "application service XXX has been impacted".

E.g. Application service with one cluster CI which in turn has 3 web servers.

If we get Critical alerts(web server down) for all 3 Web Servers then it will propagate the impact to cluster CI then to application service CI and we can see the same in ServiceMap.

In this case, ServiceNow system will have 3 "Web servers" down alerts only?

or it will have 1 more extra/new event saying application service is impacted ?

 Thanks again.

[Callum69]

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@ibsm wrote: Novitasphere Provider Portal

I went through the document links, i could not understand how exactly it works?

Suppose We have designed one service Map and created Application service with multiple entry point. Suppose we have 3 web servers in cluster, and we want to raise P1 if we receive web server not working alert from all 3 web servers, if 2 web servers are stopped then P2 and so.
does system generate new alert if the application service in the service map is getting impacted?

Kindly let me know in detail How can we configure this?

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