How to class DNS Servers?

[Bobby Campbell]

Can you please tell me where some of you are classing your DNS Servers? 

I can imagine placing them into Server, Application Service, or a new class extending one of these - or a DNS Server class extending Infrastructure Service?

[Slava Savitsky]

I would treat DNS as an Infrastructure Service and use appropriate CI relationships to indicate which Servers provide that service. Why would you be willing to have a dedicated CI class for them?

[Bobby Campbell]

We wanted DNS Servers in a Principal class so they can be picked in Changes, etc.  But your recommendation has me thinking.  So, would we have the physical servers in the appropriate classes, then relate them to the DNS service under Infrastructure Service? 

[Slava Savitsky · Accepted solution]

That's how I would approach it, but it doesn't mean you have to do it that way too. By the way, because Infrastructure Service [cmdb_ci_infra_service] table extends Application [cmdb_ci_appl] table, the appropriate relation to link Infrastructure Service records to the underlying hardware, according to ServiceNow's CSDM framework, would be "Runs on".