F5 Networks, Inc.

Enterasys Networks, Inc.

Benjamin E McCann

David G Porter

Chin-Cheng Wu

Jc Ferguson

Daniel J Dietterich

Michael J Homberg

Michael A Berger

Thomas J Teixeira

Jonathan C Nicklin

Bradford H Kemp

Bryan T Whitmore

Suchi Raman

Craig S Rasmussen

Michael J Soha

Robert T Curley

Leonard F Wisniewski

Inderpreet Singh

A system, medium and method for generating a server side transaction ID (XID') is disclosed. A request is received from a client device to access a server. The request includes a source port, source IP address, protocol information and a client generated transaction ID (XID). An endian'ness of the client of determined and classified. A Client ID unique to the client request is then generated using the source port, source IP address, protocol information, and a Masked XID generated from the endian'ness determination and the XID. A server side transaction ID (XID&#x2032;) is then synthesized by combining the Client ID and an XID halfword containing least significant bits (LSB) identified from the endian'ness determination. The XID&#x2032; is then transmitted to the file server, wherein the XID&#x2032; is associated with the XID for the corresponding client request.

System and method of algorithmically generating a server side transaction identifier

Methods and apparatus provide an adaptive load balancer that presents a virtual data system to client computer systems. The virtual data system provides access to an aggregated set of data, such as files or web service objects, available from a plurality of server data systems respectively operating within a plurality of server computer systems. The adaptive load balancer receives a client data access transaction from a client computer system that specifies a data access operation to be performed relative to the virtual data system presented to the client computer system. The adaptive load balancer processes the client data access transaction in relation to metadata associated with the virtual data system to provide access to the file or service object within a server computer system, or to access the metadata. The adaptive load balancer can work in conjunction with other adaptive load balancers to dynamically adjust to demands for access to data by replicating and migrating data such as files or service objects as needed between the server computer systems to accommodate data access demands.

Method and apparatus for adaptive services networking

An approach to rapid failover of a communication path between computers that are linked by redundant virtual links in a virtual private network (VPN) features detection of communication link and device failures through an active monitoring approach and re-routing of communication through a redundant link of the VPN when a failure is detected.

VPN failure recovery

A new type of communication protocol provides semi-reliable transport of data over a data channel, such as over the Internet. The new type of protocol limits the number of retransmissions of unsuccessfully delivered data and may eventually &ldquo;give up&rdquo; on successfully delivering particular data and go on sending subsequent data to the destination. When a reliable communication protocol, such as TCP/IP is tunneled between two computers over a virtual connection which uses the new type of semi-reliable protocol, overall error control of data passing between the two computers involves elements of error control implemented by both the semi-reliable protocol and the reliable protocol. This overall error control can provide higher throughput than provided by using either a completely reliable protocol (e.g., TCP) for the virtual connection, or a completely unreliable protocol (e.g., UDP) for the virtual connection. This advantage can be even more pronounced if the data stream is compressed or encrypted before being passed over the virtual connection using a technique which maintains state from one data packet to another.

Semi-reliable data transport

Growing community of inventors

Acton, MA, United States of America

Benjamin E McCann