Patent ID: 8024526

Claim:
A multi-node system, comprising: a node including a plurality of active devices and an interface coupled by an address network configured to convey address packets between the interface and the plurality of active devices, and a data network configured to convey data packets between the interface and the plurality of active devices, wherein the address network and the data network are separate networks; an inter-node network configured to convey coherency messages between the interface in the node and an additional interface in an additional node, wherein the additional interface is configured to send a coherency message requesting a read access right to a coherency unit on the inter-node network, wherein a given active device of the plurality of active devices has an ownership responsibility for the coherency unit; wherein the interface is configured to respond to the coherency message by sending a proxy address packet on the address network; wherein a different active device of the plurality of active devices is configured to request a read access right to another coherency unit by sending an address packet on the address network; wherein the given active device of the plurality of active devices has an ownership responsibility for the another coherency unit, wherein the given active device is configured to not transition the ownership responsibility for the another coherency unit in response to the address packet and to transition the ownership responsibility for the coherency unit in response to the proxy address packet.