Using MID Server IP range auto-assignment

Discovery Quick Start can automatically assign ranges of IP addresses, called subnets, to qualified MID Servers. This subnet auto-assignment requires SNMP credentials for read-only access to routers Discovery uses. The Automation Status Set form shows summary details of subnet Discoveries and the IP range assignments for associated MID Servers.

<table id=“table_gvt_qs4_nhb”><tbody><tr><td>

indicator for configuration phase

</td></tr></tbody> </table>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.

The subnet assignments that the instance makes for your MID Servers are stored in the Automation Status Set [automation_status_set] table. For details about MID Server auto-assignment, see Discovery Quick Start.

Important: You must auto-assign at least one MID Server to create a schedule automatically.

Parent Topic:Configuring MID Servers

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)

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 All > 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 auto-assignment in the Discovery Quick Start 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. [Omitted image "AutomationStatusSet.png"] Alt text: Automation Status Set form

3. Select the Subnets Discovered related list to view the list of subnets available for assignment.

   [Omitted image "SubnetsDiscovered.png"] Alt text: Subnets Discovered

4. Select the IP Range Assignments related list to view the IP ranges that were assigned to a MID Server.

   Warning: 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.

   [Omitted image "IPRangeAssignments.png"] Alt text: IP range assignments