INFO: MSMQ Queue Manager Can Only Read from Queues on Same CN

ID: Q181840

The information in this article applies to:

SUMMARY

Although Microsoft Message Queue Server (MSMQ) applications can open and send to any queues in the MSMQ enterprise for which they have permissions, they cannot open and receive messages from queues which are not on their connected network.

For example, consider an enterprise with two connected networks using different protocols, CN1 and CN2 with an MSMQ routing server connecting the two. Clients on CN1 can send and receive messages to other clients on the same CN. However, these same clients can only send messages to CN2. They cannot open queues on CN2 for receive access.

MORE INFORMATION

This behavior is by design. Opening a remote queue for receive access and reading messages from that queue are operations that require a direct session between the two computers. By definition, computers on different connected networks use different protocols and therefore, cannot establish a direct session with each other making this operation impossible.

In the "Microsoft Exchange Administrator's Guide," the definition of a connected network is 

   A collection of computers where any two computers can
   communicate directly.
Important design note: Because MSMQ keys on the CN definition to distinguish between computers that cannot communicate directly, as opposed to computers that are temporarily offline, you must ensure that the CN definitions properly reflect the computers' abilities to connect to each other. Computers should not be placed in different CNs when they share the same protocol and are on the same subnet. Doing this will lead to results that may vary, based on the network and MSMQ routing server configuration.

REFERENCES

For additional information about MSMQ, please see the following Microsoft Web site: 

   http://www.microsoft.com/msmq/ 

Keywords          : MQDeploy MQGen MQQueue MQRouting 
Version           : WINNT:1.0
Platform          : winnt
Hardware          : ALPHA x86
Issue type        : kbinfo

Last Reviewed: February 28, 1998