When connecting buses you need to define the foreign buses for
every bus, and the routing definition between each pair of connected buses
in the network. Where destination defaults are used you can configure them
to suit your design.
Why and when to perform this task
For a conceptual overview of connecting different service integration
buses, including security issues, refer to
Multiple bus topology.
A foreign bus is a representation of another
service integration bus, or a WebSphere MQ queue manager, with which an existing
service integration bus, or a WebSphere MQ queue manager, can exchange messages. Messages are routed to a foreign bus either directly
through a link between the local bus and the foreign bus, or indirectly through
one or more intermediate buses. Regardless of where the buses exist, if one
is foreign to the other, it requires a foreign bus link.