Cantor Colburn LLP
Trill network with multipath redundancy
Embodiments include a method and computer program product for a multilevel network with inter-layer multipath redundancy between a first network layer of leaf switches and a second network layer of spine switches. Each leaf switch is connected to multiple spine switches to provide multiple inter-layer communication paths between the leaf switches and the spine switches. Each spine switch is assigned a common Layer 2 and 3 network address, while each leaf switch is configured with an inter-layer link selection protocol to selectively connect only one active inter-layer link between the leaf switch and the wide area layer while disabling all other available inter-layer links between the leaf switch and the wide area layer. Alternative inter-layer links is thus activated without requiring the leaf switch to be configured with a new address for the alternate inter-layer link or relying on any multipath functionality implemented within the spine switches.
INTERNATIONAL BUSINESS MACHINES CORPORATION
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Anuradha Casimer M.
Rao DeCusatis