Here's an example that works for me w/a similar 3 broker topology. 

<networkConnectors>  
     <networkConnector 
          name="twowaybridge" 
          uri="static:(tcp://remotehost:61616)"                          
          networkTTL="2"
          duplex="true"/>
</networkConnectors> 

If you haven't done so already, try moving up to AMQ 5.0.

Joe




tpounds wrote:
> 
> What is the correct configuration for networkTTL and duplex?  I cannot
> seem to get this to work as expected.  The network topology I am trying to
> use is shown below.
> 
> [BROKER 1] -----> [BROKER 2] <----- [BROKER 3]
> 
> Broker 1 establishes a network connection (Non Duplex) to Broker 2.
> Broker 3 establishes a network connection (Duplex) to Broker 2.
> 
> The networkTTL on all the brokers has been set to 5.
> 
> What I see are messages that are generated by producers connecting
> directly to Broker 2 successfully send messages to Broker 3. The problem
> occurs when producers connect directly to Broker 1.  I see the messages
> successfully dispatch from Broker 1 to Broker 2 but they just sit there
> idle and are never forwarded to Broker 3.  Is this expected or a bug? Any
> help would be appreciated.
> 
> Thanks,
> Trevor
> 

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