Patents by Inventor Alfred Landrum
Alfred Landrum has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7953869Abstract: In a network supporting transactions between clients and servers and proxies that are interposable in a network path between at least one client and at least one server, wherein a pair of proxies can modify a packet stream between a client and a server such that packet data from the client to the server is transformed at a client-side proxy of the proxy pair and untransformed at a server-side proxy of proxy pair and such that packet data from the server to the client is transformed at the server-side proxy and untransformed at the client-side proxy, a method and apparatus for a discovering proxy to transparently discover its position in a proxy pair by using proxy signals to indicate to other proxies that could pair with the discovering proxy. A discovering proxy might determine that it is a client-side proxy by receipt of a packet from client without a proxy signal. A discovering proxy might determine that it is a server-side proxy by receipt of a packet from server without a return proxy signal.Type: GrantFiled: February 24, 2009Date of Patent: May 31, 2011Assignee: Riverbed Technology, Inc.Inventors: Michael J. Demmer, Steven McCanne, Alfred Landrum
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Publication number: 20100268829Abstract: Network devices include proxies and where multiple proxies are present on a network, they can probe to determine the existence of other proxies. Where more than two proxies are present and thus different proxy pairings are possible, the proxies are programmed to determine which proxies should form a proxy pair. Marked probe packets are used by proxies to discover each other and probing is done such a connection can be eventually formed even if some probe packets fail due to the marking Asymmetric routing can be detected and proxies configured for connection forwarding as necessary.Type: ApplicationFiled: June 28, 2010Publication date: October 21, 2010Applicant: Riverbed Technology, Inc.Inventors: Kand Ly, Maksim Ioffe, Alfred Landrum, Mark Stuart Day
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Patent number: 7769834Abstract: Network devices include proxies and where multiple proxies are present on a network, they can probe to determine the existence of other proxies. Where more than two proxies are present and thus different proxy pairings are possible, the proxies are programmed to determine which proxies should form a proxy pair. Marked probe packets are used by proxies to discover each other and probing is done such a connection can be eventually formed even if some probe packets fail due to the marking. Asymmetric routing can be detected and proxies configured for connection forwarding as necessary.Type: GrantFiled: May 30, 2007Date of Patent: August 3, 2010Assignee: Riverbed Technology, Inc.Inventors: Kand Ly, Maksim Ioffe, Alfred Landrum, Mark Stuart Day
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Publication number: 20090157888Abstract: In a network supporting transactions between clients and servers and proxies that are interposable in a network path between at least one client and at least one server, wherein a pair of proxies can modify a packet stream between a client and a server such that packet data from the client to the server is transformed at a client-side proxy of the proxy pair and untransformed at a server-side proxy of proxy pair and such that packet data from the server to the client is transformed at the server-side proxy and untransformed at the client-side proxy, a method and apparatus for a discovering proxy to transparently discover its position in a proxy pair by using proxy signals to indicate to other proxies that could pair with the discovering proxy. A discovering proxy might determine that it is a client-side proxy by receipt of a packet from client without a proxy signal. A discovering proxy might determine that it is a server-side proxy by receipt of a packet from server without a return proxy signal.Type: ApplicationFiled: February 24, 2009Publication date: June 18, 2009Applicant: Riverbed Technology, Inc.Inventors: Michael J. Demmer, Steven McCanne, Alfred Landrum
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Publication number: 20080320154Abstract: In a network supporting transactions between clients and servers and proxies that are interposable in a network path between at least one client and at least one server, wherein a pair of proxies can modify a packet stream between a client and a server such that packet data from the client to the server is transformed at a client-side proxy of the proxy pair and untransformed at a server-side proxy of proxy pair and such that packet data from the server to the client is transformed at the server-side proxy and untransformed at the client-side proxy, a method and apparatus for a discovering proxy to transparently discover its position in a proxy pair by using proxy signals to indicate to other proxies that could pair with the discovering proxy. A discovering proxy might determine that it is a client-side proxy by receipt of a packet from client without a proxy signal. A discovering proxy might determine that it is a server-side proxy by receipt of a packet from server without a return proxy signal.Type: ApplicationFiled: June 6, 2008Publication date: December 25, 2008Applicant: Riverbed Technology, Inc.Inventors: Michael J. Demmer, Steven McCanne, Alfred Landrum
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Publication number: 20080320151Abstract: Self-discovering transaction accelerators improve communications between a client and a server. A client directs a message to a server. A client-side transaction accelerator intercepts the message, terminates the connection with the client, and accelerates the request by replacing segments of data with references. The accelerated request is forwarded to a server-side transaction accelerator through a new connection. The server-side transaction accelerator reconstructs the message by replacing the reference with segment data in a persistent segment store accessible to the server-side transaction accelerator. The reconstructed request is then provided to the server. Accelerations may occur in any direction of communication. Persistent segment stores can be pre-populated with segment data from other transaction accelerators and anticipated transactions.Type: ApplicationFiled: August 14, 2008Publication date: December 25, 2008Applicant: RIVERBED TECHNOLOGY, INC.Inventors: Steven McCanne, Michael J. Demmer, Arvind Jain, David Tze-Si Wu, Alfred Landrum
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Patent number: 7318100Abstract: In a network supporting transactions between clients and servers and proxies that are interposable in a network path between at least one client and at least one server, wherein a pair of proxies can modify a packet stream between a client and a server such that packet data from the client to the server is transformed at a client-side proxy of the proxy pair and untransformed at a server-side proxy of proxy pair and such that packet data from the server to the client is transformed at the server-side proxy and untransformed at the client-side proxy, a method and apparatus for a discovering proxy to transparently discover its position in a proxy pair by using proxy signals to indicate to other proxies that could pair with the discovering proxy. A discovering proxy might determine that it is a client-side proxy by receipt of a packet from client without a proxy signal. A discovering proxy might determine that it is a server-side proxy by receipt of a packet from server without a return proxy signal.Type: GrantFiled: August 12, 2003Date of Patent: January 8, 2008Assignee: Riverbed Technology, Inc.Inventors: Michael J. Demmer, Steven McCanne, Alfred Landrum
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Publication number: 20070283023Abstract: Network devices include proxies and where multiple proxies are present on a network, they can probe to determine the existence of other proxies. Where more than two proxies are present and thus different proxy pairings are possible, the proxies are programmed to determine which proxies should form a proxy pair. Marked probe packets are used by proxies to discover each other and probing is done such a connection can be eventually formed even if some probe packets fail due to the marking. Asymmetric routing can be detected and proxies configured for connection forwarding as necessary.Type: ApplicationFiled: May 30, 2007Publication date: December 6, 2007Applicant: Riverbed Technology, Inc.Inventors: Kand Ly, Maksim Ioffe, Alfred Landrum, Mark Day
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Publication number: 20070283024Abstract: In address-manipulation enabled transaction accelerators, the transaction accelerators include outer-connection addressing information in packets emitted over an inner connection between transaction accelerators and inner-connection addressing information is added in packets sent over the inner connection. The inner-connection addressing information can be carried in TCP option fields, directly in other fields, or indirectly through data structures maintained by the endpoints processing the connection. Address information can be encoded into header fields originally intended for other purposes but that are unused or encoded into used fields, overlaid in combination with other data that is being carried in those used fields. The existence of inner-connection addressing information in a packet can be signaled by a flag in the packet, by a bit or other designated encoding. The flag can be in an unused header field or overlaid.Type: ApplicationFiled: March 7, 2007Publication date: December 6, 2007Applicant: Riverbed Technology, Inc.Inventors: Alfred Landrum, Kand Ly, Steve McCanne
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Publication number: 20040243703Abstract: In a network supporting transactions between clients and servers and proxies that are interposable in a network path between at least one client and at least one server, wherein a pair of proxies can modify a packet stream between a client and a server such that packet data from the client to the server is transformed at a client-side proxy of the proxy pair and untransformed at a server-side proxy of proxy pair and such that packet data from the server to the client is transformed at the server-side proxy and untransformed at the client-side proxy, a method and apparatus for a discovering proxy to transparently discover its position in a proxy pair by using proxy signals to indicate to other proxies that could pair with the discovering proxy. A discovering proxy might determine that it is a client-side proxy by receipt of a packet from client without a proxy signal. A discovering proxy might determine that it is a server-side proxy by receipt of a packet from server without a return proxy signal.Type: ApplicationFiled: August 12, 2003Publication date: December 2, 2004Applicant: NBT Technology, Inc.Inventors: Michael J. Demmer, Steven McCanne, Alfred Landrum