Enabling communication over cross-coupled links between independently managed compute and storage networks

Abstract

Embodiments relate to providing communication over cross-coupled links between independently managed compute and storage networks. An aspect includes coupling an independently managed local subsystem with an independently managed remote subsystem over cross-coupled links, whereby each subsystem includes compute entities and storage entities. Unique identifiers are assigned to all the compute entities and the storage entities in the local network and the remote network. A determination is then made as to whether each entity is in the local subsystem or the remote subsystem. Accordingly, a global broadcast tree is built to bridge the compute entities in the local subsystem to the storage entities in both the local and remote subsystem. Responsive to an error in a layer of the local subsystem external to a cross-coupled link, the cross-coupled link in the local subsystem is disabled. Accordingly, the remote subsystem may detect that the link has failed.