Discovery Preferences window: Level 2: IBM Director Agents page

This topic describes the Discovery Preferences window: Level 2: IBM Director Agents page.

Introduction

Use this dialog to define the parameters for discovering systems in your enterprise.

Fields

General
Select General to specify general discovery preferences.
System Discovery (IP)
Select System Discovery (IP) to specify TCP/IP discovery preferences.
System Discovery (IPX)
If you have IPX installed on the management server, you can select this to specify IPX discovery preferences.
Level 2: IBM Director Agents
The fields displayed when the General setting is selected:
Auto-discover period (hours)
The frequency with which IBM Director Server attempts to automatically discover other IBM Director systems for management. This feature can be disabled (the default value) or set to a period of 1 - 168 hours (7 days).
Presence Check Period (minutes)
The frequency with which IBM Director Server checks the status of each IBM Director system it can manage. The presence check period determines how quickly the IBM Director Server detects that a system has gone offline (due to a problem, or being shutdown), or has come online. The automatic presence check can be disabled, or set to repeat every 1 - 240 minutes (4 hours). The default setting is 15 minutes.
Automatically secure unsecured systems
Select this check box to instruct the IBM Director Server to automatically secure any unsecured system that it finds and can manage. When this setting is enabled, the IBM Director Server delivers its public keys to any system it finds, even if the system is secured by another server. The IBM Director Server then secures the client, instructing it to not trust any server for which it does not already have public keys.
Auto-add unknown agents which contact server
Select this check box to have the IBM Director Server automatically add to the Group Contents pane unknown agents that contact the server. This process occurs after the discovery task is performed by the server. Unknown agents are those not previously discovered.
System Discovery (IP)
These fields are displayed when System Discovery (IP) is selected:
Properties
Broadcast
Use this to specify how discovery is performed in the local network.
Use TCP/IP general broadcasts
When this check box is selected, IBM Director issues a general IP broadcast to discover native systems. Some sites might not use a general IP broadcast to discover systems. If your site does not permit general broadcasts, disable this option by ensuring that this box is not selected.
Multicast
The setting that allows you to use a different multicast group address for discovery.
Use TCP/IP Multicasts
When this check box is selected, IBM Director issues an IP multicast in an attempt to discover systems. Multicasting can have the advantage of being able to discover systems across multiple subnets without requiring specific configuration data for each subnet.
Multicast Group
This is the multicast address in dotted decimal format. If changed from the default of 224.0.1.118, the multicast discovery finds only systems that have had their multicast group address changed to the same value.
Multicast TTL
This controls the time-to-live (TTL) for the multicast discovery packets. This value typically corresponds to the number of times a packet is forwarded between subnets, allowing control of the scope of subnets discovered.
註: Routers are sometimes configured to prevent passing of multicast packets between subnets and prevent discovery of systems between subnets using multicasting. Routers can also be configured to restrict the minimum multicast TTL for packets it passes between subnets, which can result in the need to set the Multicast TTL higher to discover systems on the other subnets of the router.
Address Entries
Address
The value of the IP address.
Mask (or Address)
The mask or address.
Type
The type of discovery being used.
Add
Add one of the following types of addresses:
Broadcast
Displays Add Broadcast Address, where you enter the IP address and subnet for directed broadcast.
Relay
Displays Add Relay Address, where you enter the IP address and subnet for directed broadcast.
Unicast Address
Displays Add Unicast Address, where you enter the IP address for the unicast discovery.
Unicast Range
Displays the Add Unicast Address Range, where you enter a start and end address.
Edit
This allows you to change the values of the selected address.
Remove
This deletes the selected address.
System Discovery (IPX)
These fields are displayed when System Discovery (IPX) is selected:
Properties
Broadcast
Use IPX general broadcasts
When this check box is selected, IBM Director issues a general IPX broadcast to discover native systems. Some sites might not use a general IPX broadcast to discover systems. If your site does not permit general broadcasts, disable this option by ensuring that this box is not selected.
Address Entries
Add
Displays a window that allows you to type an IPX address.
Edit
This allows you to change the values of the selected address.
Remove
This deletes the selected address.
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