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# Target attribute changes

After you create an attribute change, you assign (target) it to one or more server instances. The attribute change looks for changes in attribute values only on the servers to which it has been targeted.

Note: To temporarily stop an attribute change from generating traps, un-target it from all servers by deselecting them on the Servers tab.

To target attribute changes:

1. If you have not already done so, in the Change Center of the Administration Console, click Lock & Edit (see Use the Change Center).
2. In the Administration Console, expand Diagnostics > SNMP Agent and select Attribute Changes.
3. On the SNMP Attribute Changes page, click the name of the attribute change.
4. Select the Servers tab.
5. On the Servers tab, check each server on which you want the attribute change to function.
   If you are configuring an attribute change for a domain-wide resource, such as a file store, select the Administration Server.

   Note: When you assign an attribute change to a server, you deploy a JMX listener and filter to the server. The listener forwards a notification to the WebLogic SNMP agent only if an event matches the criteria in the attribute change.

   For example, if you create an attribute change that observes the `AcceptBacklog` attribute of ServerA's `Server` MBean, and if you target this attribute change to ServerB, the attribute change on ServerB will never generate a trap, because ServerB does not have access to the configuration data of ServerA.

6. Click Save.
7. To activate these changes, in the Change Center of the Administration Console, click Activate Changes.
   Not all changes take effect immediately—some require a restart (see Use the Change Center).