Global Queue Pair Management in a Point-to-Point Computer Network

An information handling system comprising:

• one or more processors;
• a memory coupled to at least one of the processors;
• a set of computer program instructions stored in the memory and executed by at least one of the processors in order to perform actions of:
• receiving, at a local module, a data frame initiated by a first virtual machine, wherein the data frame has a target destination at a second virtual machine that executes on a destination host;
• identifying a destination global queue pair number and a destination local port ID that correspond to the second virtual machine, wherein the destination global queue pair number is independent of the destination host;
• including the destination global queue pair number and the destination local port ID in an overlay header;
• encapsulating the data frame with the overlay header, the encapsulating resulting in an encapsulated frame;
• and
• sending the encapsulated frame through a computer network to the second virtual machine.

A computer program product stored in a computer readable storage medium, comprising computer program code that, when executed by an information handling system, causes the information handling system to perform actions comprising:

• receiving, at a local module, a data frame initiated by a first virtual machine, wherein the data frame has a target destination at a second virtual machine that executes on a destination host;
• identifying a destination global queue pair number and a destination local port ID that correspond to the second virtual machine, wherein the destination global queue pair number is independent of the destination host;
• including the destination global queue pair number and the destination local port ID in an overlay header;
• encapsulating the data frame with the overlay header, the encapsulating resulting in an encapsulated frame;
• and
• sending the encapsulated frame through a computer network to the second virtual machine.

A method comprising:

• receiving, at a local module, a data frame initiated by a first virtual machine that executes on a first host, wherein the data frame has a target destination at a second virtual machine that executes on a second host;
• identifying a destination global queue pair number and a destination local port ID that correspond to the second virtual machine, wherein the destination global queue pair number is independent of the destination host;
• determining, by the local module, that the destination local port ID is not valid;
• querying a distributed policy service by the local module for an updated local port ID that corresponds to the destination global queue pair number;
• receiving the updated destination local port ID from the distributed policy service at the local module in response to the querying, wherein the updated destination local port ID corresponds to a third host to which the second virtual machine migrated;
• including the destination global queue pair number and the updated destination local port ID in an overlay header;
• encapsulating the data frame with the overlay header, the encapsulating resulting in an encapsulated frame;
• and
• sending the encapsulated frame through a computer network to the second virtual machine executing on the third host.