Utilization of TCP segmentation offload with jumbo and non-jumbo networks

摘要

A traffic management device (TMD) is situated between a one or more network devices providing jumbo network traffic and one or more device providing non-jumbo network traffic. The TMD is configured to employ TCP segmentation offload hardware within a Network Interface Card (NIC) at the level two/four layers of the OSI stack by rewriting maximum segment size (MSS) information during initial handshake operations, such that jumbo frames may be split into digestible size frames for a non-jumbo network communications.

主权项

1. A traffic management device (TMD) interposed between a first computing device and a second computing device, comprising:
a transceiver to send and receive data over a network; and one or more physical devices operative to perform actions comprising:
receiving within a synchronization (SYN) handshake message from the first computing device a packet at layer 3 of the Open Systems Interconnection (OSI) model indicating that a communication from the first computing device is using non jumbo frames at layer 2 of the OSI model, based on a maximum segment size (MSS) value;rewriting the MSS value within the SYN handshake message to increase the MSS value to indicate communications are to use jumbo frames at layer 2 of the OSI model; andforwarding the rewritten SYN handshake message to the second computing device, such that communications with the second computing device uses jumbo frames at layer 2 of the OSI model and wherein the jumbo frames are split into smaller frames and resent to the first computing device as non jumbo frames at layer 2 of the OSI model.