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# Configure messaging bridge instances

Before you begin

- Interoperating with Different WebLogic Server Releases
- Create messaging bridge instances

A messaging bridge instance communicates with the configured source and target bridge destinations. For each mapping of a source destination to a target destination, whether it is another WebLogic JMS implementation or a third-party JMS provider, you must configure a messaging bridge instance. Each instance defines the source and target destination for the mapping, a message filtering selector, a quality of service (QOS), transaction semantics, and reconnection parameters.

To configure a messaging bridge instance:

1. In the left pane of the console, expand Services > Messaging and select Bridges.
2. On the Summary of Messaging Bridges page, select the instance you want to configure.

   If the table is empty, refer to Create messaging bridge instances.

3. On the Configuration > General tab, update as necessary:
   1. Source Bridge Destination -- Source destination for this messaging bridge instance.
   2. Target Bridge Destination -- Target destination for this messaging bridge instance.
   3. Selector -- Message filter for this messaging bridge instance.
   4. Quality Of Service -- QOS (quality of service) used by the messaging bridge instance.
   5. QOS Degradation Allowed -- Specify whether this messaging bridge instance allows the degradation of its QOS (quality of service).
   6. Maximum Idle Time -- Maximum amount of idle time, in seconds, for the messaging bridge.
   7. Asynchronous Mode Enabled -- Specify whether or not the messaging bridge instance works in asynchronous messaging mode.
   8. Durability Enabled -- Specify whether or not the messaging bridge allows durable messages.
   9. Started -- Specify the initial state of the messaging bridge instance.
   10. Preserve Msg Property -- Specify if message properties are preserved when messages are forwarded.

   For more information on general destination attributes, see Configuration Options.

4. Click Save.
5. On the Targets tab, select an independent server instance, a cluster, or a migratable server target on which to deploy the messaging bridge. See Target messaging bridges to servers.
6. Optionally, on the Configuration > Connection Retry tab, change the attribute fields or accept the default values as assigned. See Configure connection retry properties.
7. Optionally, on the Configuration > Transactions tab, change the attribute fields or accept the default values as assigned. See Configure transaction properties.