MID Server IP range auto-assigment

IP ranges that represent a subnet can be automatically assigned to MID Servers.

To be automatically assigned to a subnet, a MID Server must be:
  • In a running (Up) state.
  • Successfully validated.
  • Able to access one or more subnets in your network.
You can select MID Servers for auto assignment using either of these methods:
  • Guided Setup: The ITOM Guided Setup module leads you through the process of installing and configuring a MID Server and automatically assigning that MID Server to a subnet range. When you use the Guided Setup to assign MID Servers to subnets, the instance runs Discovery to identify the available subnets and then makes the assignments for the MID Servers you select. To get started with Guided Setup, navigate to Guided Setup > ITOM Guided Setup.
  • Auto-Assign IP Ranges: The MID Server > Auto-Assign IP Ranges module displays the MID Server auto assignment list. When you select one or more MID Servers for auto-assignment, the instance runs Discovery to identify the subnets in your network and completes the MID Server IP range assignments.

The subnet assignments that the instance makes for the MID Servers you select are stored in the Automation Status Set [automation_status_set] table.

Required SNMP OIDs for MID Server IP range auto-assignment

Customers who use network service providers must request specific SNMP access to use MID Server IP range auto-assignment.

IP range auto-assignment requires SNMP credentials for read-only access to all routers that Discovery uses to identify subnets. In addition, your service provider must grant the following SNMPWALK access:

  • iso.org.dod.internet.mgmt.mib-2.ip.ipRouteTable (1.3.6.1.2.1.4.21)
    • ipRouteDest (1.3.6.1.2.1.4.21.1.1)
    • ipRouteNextHop (1.3.6.1.2.1.4.21.1.7)
    • ipRouteType (1.3.6.1.2.1.4.21.1.8)
    • ipRouteMask (1.3.6.1.2.1.4.21.1.11)
  • iso.org.dod.internet.mgmt.mib-2.ip.ipForward.ipCidrRouteTable (1.3.6.1.2.1.4.24.4)
    • ipCidrRouteDest (1.3.6.1.2.1.4.24.4.1.1)
    • ipCidrRouteMask (1.3.6.1.2.1.4.24.4.1.2)
    • ipCidrRouteNextHop (1.3.6.1.2.1.4.24.4.1.4)
    • ipCidrRouteType (1.3.6.1.2.1.4.24.4.1.6)

Select MID Servers for auto-assignment

Select the MID Servers you want the instance to automatically assign to discovered subnets.

Before you begin

Role required: admin

About this task

You can auto-assign MID Servers in ITOM Guided Setup or use this procedure to select MID Servers for subnet assignments from the instance navigator.

Procedure

  1. Navigate to MID Server > Auto-Assign IP Ranges.
    The MID Server range auto-assignment lists appear. Only validated, running MID Servers are available for selection.
    Figure 1. MID Server auto-assignment lists
    MID Server auto-assignment lists
  2. Drag and drop MID Servers selected for assignment from the Available list to the Selected list, or use the arrow buttons to move them.
  3. Click OK when you are done.
    The instance runs a subnet Discovery and automatically assigns the MID Servers you have selected to the subnets that Discovery finds.

View automation status sets and IP range assignments

The Automation Status Set form shows summary details of a subnet Discovery and the subsequent IP range assignments for MID Servers selected for automatic subnet assignment.

Before you begin

Role required: admin

Procedure

  1. Navigate to MID Server > Automation Status Sets.
  2. Select a status record for a subnet Discovery you want to view.
    The form contains read-only status information about the selected Discovery, the subnets found, and the range assignment process for the MID Servers you selected for auto assignment.
    Important: IP ranges assigned manually prior to using the auto-assignment feature are affected as follows:
    • Individual IP ranges are retained and appended to the ranges assigned automatically by the system for the designated MID Server.
    • If the MID Server was configured with the All ranges selection, the auto-assignment feature overwrites that designation with the ranges it finds.
    Figure 2. Automation Status Set form
  3. Select the Subnets Discovered related list to view the list of subnets available for assignment.
  4. Select the IP Range Assignments related list to view the IP ranges that were assigned to a MID Server.
    Caution: IP ranges identified by Discovery are stored in the IP collection [ip_address_collection] table, which is only used for MID Server IP range auto-assignment in the Jakarta release. This table is intended for future development and should not be used in any customizations, including column additions, business rules, or scripting actions.