WAS v8.5 > Administer applications and their environment > Welcome to administering Messaging resources > Manage messaging with the default messaging provider > Interoperate with a WebSphere MQ network > Use WebSphere MQ links to connect a bus to a WebSphere MQ network

Administer an existing WebSphere MQ link

The WebSphere MQ link enables the exchange of point-to-point and publish/subscribe messages with a WebSphere MQ network. After we have created a WebSphere MQ link we can undertake various administrative actions on the link.

The WebSphere MQ link connects a WAS and a WebSphere MQ network. Because these two systems are working together, their functions must be in step so that each is aware of the status of the other. Administrative actions on the WebSphere MQ link and its functions include the following:

• Modify individual functions of the WebSphere MQ link .

  We can modify the link itself, add or modify the sender channel and receiver channel, or define a broker profile and associated topic mappings.

• Modify security for a WebSphere MQ link.
• View the status of a WebSphere MQ link and its components. We can view the status of a WebSphere MQ link and its sender and receiver channels, and we can view the status of subscriptions for a WebSphere MQ link publish/subscribe broker profile.
• Start a WebSphere MQ link.
• Stop a WebSphere MQ link.

  When you stop the link, all its functions are stopped too. For example, stopping a WebSphere MQ link with broker profiles on it might leave a message broker in the WebSphere MQ network with a backlog of messages. For more information, see Stopping a WebSphere MQ link, Stopping the sender channel on a WebSphere MQ link and Stopping the receiver channel on a WebSphere MQ link.

• Delete a WebSphere MQ link or one of its components. When you remove a foreign bus connection between a service integration bus and a WebSphere MQ network, you also delete the associated WebSphere MQ link along with any publish/subscribe broker profiles and topic mappings. We can also delete a WebSphere MQ link publish/subscribe broker profile or delete a topic mapping from a WebSphere MQ link.

Subtopics

• Modify a WebSphere MQ link
  How and when to modify the properties of a WebSphere MQ link.
• Modify security for a WebSphere MQ link
  Securing access between a service integration bus and a WebSphere MQ Queue Manager.
• View the status of a WebSphere MQ link and its sender and receiver channels
  You might want to view the status of a WebSphere MQ link or its components because you intend to stop the WebSphere MQ link and to see if there are any messages currently held on it, or you are about to delete the WebSphere MQ link and we have to verify there are no messages on it, or messages have not arrived at their expected destination and to check if they are being held, pending transmission over the WebSphere MQ link.
• View the status of subscriptions for a WebSphere MQ link publish/subscribe broker profile
  We can use the dmgr console to view the status of subscriptions for a broker profile on a WebSphere MQ link.
• States of the WebSphere MQ link and its channels
  For each possible state of a WebSphere MQ link, this table lists the associated states of the link's sender and receiver channels.
• Start a WebSphere MQ link
  Change the state of a WebSphere MQ link from stopped to started.
• Stopping a WebSphere MQ link
  We can change the state of a WebSphere MQ link from "Started" or "Running" to "Stopped". When you stop a WebSphere MQ link, all communication with the target WebSphere MQ network is stopped for both point-to-point and publication and subscription. Messages waiting for transmission are held on the service integration bus, and the MQ sender channel cannot start. If there is a publish/subscribe bridge on the WebSphere MQ link, its operations are stopped.
• Delete a WebSphere MQ link publish/subscribe broker profile
  This describes how you delete a broker profile and all topic mappings on a WebSphere MQ link, which forms a publish/subscribe bridge between WAS and a WebSphere MQ network.
• Delete a topic mapping on a WebSphere MQ link publish/subscribe broker profile
  This describes how you delete a topic mapping on a broker profile on a WebSphere MQ link, which forms part of a publish/subscribe bridge between WAS and WebSphere MQ.

Related

Prepare to remove a foreign bus connection between a service integration bus and a WebSphere MQ network
Remove a foreign bus connection from a bus

Related information:

WebSphere MQ links [Collection]
WebSphere MQ link [Settings]
WebSphere MQ link routing properties [Settings]

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