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Servers: Services: SNMP

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This page summarizes the SNMP attribute changes, log filters, and SNMP monitors that have been targeted to this server.

If you target SNMP agents to individual Managed Servers, you do not need to target attribute changes, log filters, and SNMP monitors to a server. An SNMP agent on a Managed Server monitors only the resources on its host Managed Server.

If you want to use an SNMP agent on the Administration Server to monitor all servers in the domain, then target attribute changes, log filters, and SNMP monitors to individual servers.

Attribute changes configure an SNMP agent to send a notification immediately after a configuration attribute is changed in any way. For example, you can configure an attribute change that sends a notification whenever a server's listen address changes.

A log filter enables WebLogic Server to generate notifications when subsystems or applications generate log messages.

WebLogic SNMP monitors poll WebLogic Server MBeans at a specified interval to check for the occurrence of conditions or the crossing of thresholds. When a monitor detects the specified condition, it sends a notification to the configured trap destinations. WebLogic Server supports three types of monitors:

  • A string monitor periodically polls an attribute whose value is a string and generates a notification if the attribute value matches a string that you specify. Alternatively, you can specify that the monitor generates a notification if the attribute value does not match your string.

  • A gauge monitor indicates whether an attribute is operating within a specific range.

  • A counter monitor indicates whether an attribute value is above a specific threshold.

Column Display

Name Description
Name of

The name that you specified when you created the attribute change.

Monitored MBean Type

The MBean type that defines the attribute you want to monitor. Do not include the MBean suffix. For example, specify Server to monitor a ServerMBean.

WebLogic Server does not support using Attribute Change notifications to monitor run-time attributes. Runtime MBeans always include the word Runtime in their names. For example, the ServerRuntime MBean provides access to runtime attributes while the Server MBean provides access to configuration attributes. To monitor changes in an MBean that includes Runtime in its name, use a String Monitor, Gauge Monitor, or Counter Monitor.

MBean Attribute:
SNMPAttributeChangeMBean.AttributeMBeanType

Monitored MBean Name

The name of the MBean instance that you want to monitor. If you leave the name undefined, WebLogic Server monitors all instances of the MBean type that you specify in Monitored MBean Type.

Do not enter the full JMX object name of the MBean instance. Instead, enter only the value that you provided when you created the instance. To create unique MBean object names, WebLogic Server encodes several name-value pairs into each object name. One of these pairs is Name of=name, and this is the value that you enter for MBean Name. For example:
"MedRec:Name=MedRecServer,
Type=ServerRuntime"

In the previous example, specify MedRecServer as the name of the MBean instance.

MBean Attribute:
SNMPAttributeChangeMBean.AttributeMBeanName

Monitored Attribute Name

The name of the attribute that you want to monitor. This attribute must be in the WebLogic Server MIB.

MBean Attribute:
SNMPAttributeChangeMBean.AttributeName

Enabled Servers

The list of target servers for trap generation. If no server is specified, no trap will be generated.

MBean Attribute:
SNMPAttributeChangeMBean.EnabledServers

Column Display

Name Description
Name of

The name that you specified when you created the log filter.

Severity Level

The minimum severity of a message that causes a WebLogic Server SNMP agent to generate a notification.

MBean Attribute:
SNMPLogFilterMBean.SeverityLevel

Subsystem Names

A list of subsystems whose messages are selected by this log filter. If none are specified, messages from all subsystems are selected.

MBean Attribute:
SNMPLogFilterMBean.SubsystemNames

User IDs

A list of user IDs that causes a WebLogic Server SNMP agent to generate a notification.

Every message includes the user ID from the security context in which the message was generated.

If the user ID field for a message matches one of the user IDs you specify in the filter, WebLogic Server generates a notification.

If this log filter doesn't specify user IDs, WebLogic Server can generate a notification for messages from all user IDs.

MBean Attribute:
SNMPLogFilterMBean.UserIds

Message IDs

A list of message IDs or ID ranges that cause a WebLogic Server SNMP agent to generate a notification.

If no IDs are specified, this filter selects all message IDs.

Example list: 20,50-100,300

MBean Attribute:
SNMPLogFilterMBean.MessageIds

Message Substring

A string that is searched for in the message text. Only messages that contain the string are selected. If a string is not specified, all messages are selected.

MBean Attribute:
SNMPLogFilterMBean.MessageSubstring

Enabled Servers

The list of target servers for trap generation. If no server is specified, no trap will be generated.

MBean Attribute:
SNMPLogFilterMBean.EnabledServers

Column Display

Name Description
Name of

The name that you specified when you created the SNMP monitor.

Type

The type of SNMP monitor.

Monitored MBean Type
Monitored MBean Name
Monitored Attribute Name
Polling Interval
Enabled Servers
Agent Name

The user-specified name of this MBean instance.

This name is included as one of the key properties in the MBean's javax.management.ObjectName:
Name of=user-specified-name

MBean Attribute:
SNMPAgentMBean.Name

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