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How do I tell Aeron which port to use?


You want an Aeron subscription to receive data on a particular UDP port.


Specify the host and port to listen on in the Aeron channel definition.


Given a configured Aeron object, you can define the listening host and port on a subscription calling the addSubscription method with the desired channel configuration:

Subscription subscription 
    = aeron.addSubscription("aeron:udp?endpoint=", 1);

The example above has a channel configuration of aeron:udp?endpoint= This tells Aeron to construct a UDP channel, with the host set to and port 12345. Note you cannot bind subscriptions to remote hosts, and you cannot use ports already in use.

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