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.