MID Server configuration for Service Mapping in fresh installs

For fresh Istanbul installations, Service Mapping uses a new algorithm to choose a MID Server for a discovery request.

MID Servers have the following mandatory selection criteria that Service Mapping in fresh installs uses to choose a MID Server for a discovery request:
  • Application - defines what application a MID Server works with. Set it to Service Mapping to reserve this MID Server exclusively to Service Mapping discovery requests. Alternatively, set it to ALL to allow any ServiceNow application to use this MID Server.
  • Capability - defines the network capability. For Service Mapping, set this parameter to ALL or any combination of SSH, WMI, or SNMP.

  • IP range - limits operation of this MID Server to this IP range. Service Mapping does not choose this MID Server for a discovery request whose endpoint is outside this IP range.
Important: These selection criteria are mandatory for the new MID Server algorithm in fresh installs. Configure them in every MID Server you are planning to use with Service Mapping.
Note: In upgraded deployments, Service Mapping uses the legacy algorithm for selecting MID Servers. For more information, see MID Server configuration for Service Mapping in upgraded deployments.

In addition to selection criteria, you can configure one of the MID Servers as the default server that Service Mapping uses.

In fresh installs of the ServiceNow deployment, Service Mapping selects a MID Server using a new improved algorithm:
  • Service Mapping chooses the MID Server whose selection criteria best match the parameters of the discovery request.
  • If there are no MID Servers with matching selection criteria, Service Mapping chooses the default MID Server.
  • If there are no MID Servers with matching selection criteria or default MID Server, Service Mapping cannot start the discovery process.

While by default Service Mapping uses a new algorithm in fresh installs, it can support both new and legacy algorithms for selecting a MID Server. For more information, see Choose MID Server selection algorithm.