Offload operations for overlay networks

摘要

Techniques are presented herein for receipt/transmission of packets to/from a host via a connected input/output (IO) device. In general, a packet is associated with a payload, an inner packet header, and an outer overlay header. The IO device is configured to perform independent offload operations on the inner packet header and the outer overlay header.

主权项

1. A method comprising:
obtaining, at an input/output (IO) device comprising at least one offload module, information regarding a packet for transmission by the IO device on an overlay network, wherein the packet is associated with a payload, an incomplete inner packet header, and an incomplete outer overlay header; at the at least one offload module of the IO device, independently performing offload operations on each of the incomplete inner packet header and the incomplete outer overlay header to generate a complete inner packet header and a complete outer overlay header by performing a first pass through the at least one offload module of the IO device to complete the inner packet header and performing a second pass through the offload module of the IO device to complete the outer overlay header; and transmitting, by the IO device, the packet including the complete inner packet header, the complete outer overlay header, and the payload on the overlay network.