What is difference between Horizontal discovery and top-down discovery?

[Dinesh Nikam]

Need more clarification......

[Jeff Currier]

At the highest level, horizontal discovery works on a range of IP addresses to discover the infrastructure.  Top Down discovery, or Service Mapping, starts with a URL or entry point and then sees where that transaction goes (URL - Load Balancer - app server - database server) to discover the application or business service.

Does that help?

[richardbrounste]

Here is a good previous community article answer.  What questions do you have on this?  

https://community.servicenow.com/community?id=community_question&sys_id=5549c325db5cdbc01dcaf3231f96...

[anubhavkapoor76]

Hi Dinnex,

Best Explanation what I got in one of the Seminars:

1) Horizontal Discovery:When you do CI Discovery by the four phases (Port Scanning, Classification, Identification and Exploration) by a Discovery Schedule or by Quick Discovery or by Patterns.

2) Top down Discovery ( Also called Vertical Discovery): This is what is Service Mapping and tracks all the DEPENDENT Business Services and CI's right from an entry point ( starting point) and goes till the last node. This type of Discovery helps in Outages when we have to view the level of impact from he same dependent list.

Mark this helpful/correct if this works for you.

Cheers!!

Anubhav

[Inactive_Us2002]

Horizontal discovery : In horizontal discovery you point to a range of IP addresses.

Ex : Mention some IP Range and start discovery it will discovery everything  about the devices in that range!" but suppose if a CI[server] talking to database that is not in that IP range, the connection will fail to discover.

Service Mapping :It is a top down approach where you give it a starting point then it's start discovering  connections specific to that business service. If some CI on the same range but not part of the business service it's not discovered.

Mark this helpful/correct if this works for you.

Raghu