Patent ID: 8780916
Filing Date: 2014-07-15
Classification: H04L

Abstract:
1. A method of operating a system including a plurality of nodes each connected to at least one IB switch, the method including: sending ARP messages from a node of the plurality of nodes to one or more of an extended multicast group and a standard multicast group, the extended multicast group including destination nodes having multiport aware implementations and the standard multicast group including destination nodes not supporting the multiport aware implementations; determining whether a media access control (MAC) address of the node of supports the multiport aware implementation; determining whether an ARP packet from the node includes an IP over GUID, if the node does support the multiport aware implementation; using the IP over GUID from the MAC address of the node, if the ARP packet from the node includes the IP over GUID, and indicating that the IP over GUID of the node is unidentified, if the ARP packet from the node does not include the IP over GUID; determining whether an IP address of the node is included in a first level of a global ARP cache, if the node sends ARP messages to the standard multicast group or to the extended multicast group where the ARP packet from the node includes the IP over GUID; identifying an IP over IB GUID corresponding to the IP address of the node; determining whether an entry in a second level of the global ARP cache includes the identified IP over IB GUID of the node; and corresponding the IP over IB GUID of the node to IB address information of the node.