| 摘要 |
A virtual IP topology in an IRW network is dynamically migrated from a current topology to a new topology while minimizing end user impact by maximizing network connectivity and by minimizing impact on heavier traffic communications. The virtual IP connections that must be added and removed to migrate from the old to the new topology are first determined. Next, two connections are selected and removed from the network with the objective of maintaining network connectivity and minimizing impact on heavier traffic communications. All virtual connections that satisfy resource constraints are then selected and added to the network. Next, at most one virtual connection is selected and removed from the network, the selected connection being the least loaded connection that leaves the network in a connected state. Finally, virtual connections are continuously added and removed until the network is completely migrated to the new topology. In a second embodiment, butterfly switching is initially performed.
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