John P Terry

US Patent:

7415002, Aug 19, 2008

Filed:

Oct 24, 2003

Appl. No.:

10/693618

Inventors:

Kreg A. Martin - Los Gatos CA, US
Ronald K. Kreuzenstein - Sunnyvale CA, US
John M. Terry - San Jose CA, US

Assignee:

Brocade Communications, Inc. - San Jose CA

International Classification:

H04J 3/06
H04J 14/00
H04L 7/00
H04B 10/00

US Classification:

370350, 370510, 370519, 375365, 375371, 398 53, 398129

Abstract:

A device that synchronizes circuits over asynchronous links is disclosed. Some embodiments of the invention include a device that comprises a plurality of circuits. One of the plurality of circuits is designated as a “master” circuit. The master circuit is configured to send a first synchronization signal to one or more of the plurality of circuits, and each circuit that receives the first synchronization signal is configured to responsively send a second synchronization signal to one or more of the plurality of circuits.

US Patent:

8427958, Apr 23, 2013

Filed:

Apr 30, 2010

Appl. No.:

12/771943

Inventors:

Kung-Ling Ko - Union City CA, US
Surya Prakash Varanasi - Dublin CA, US
Satsheel B. Altekar - San Jose CA, US
John Michael Terry - San Jose CA, US
Venkata Pramod Balakavi - San Jose CA, US

Assignee:

Brocade Communications Systems, Inc. - San Jose CA

International Classification:

G06F 11/00

US Classification:

370237, 370389, 370474

Abstract:

A switch creates and dynamically updates a latency map of a network to adjust routing of flows. Further, the network is monitored to detect latency issues and trigger a dynamic adjustment of routing based on the latency map. In this manner, a flow can be routed along a route (i. e. , a faster route) that provides less latency than other available routes. The latency map can be generated based on latency probe packets that are issued from and returned to the source switch. By evaluating many such latent probe packets that have traveled along many available routes (e. g. , corresponding to various ports of the switch), the switch or associated administrative logic can dynamically adjust the latency map to updated latency information of available routes. Therefore, responsive to a trigger, the source switch can dynamically adjust the routing of a flow based on latency issues discerned from the network.

US Patent:

8446914, May 21, 2013

Filed:

Apr 22, 2011

Appl. No.:

13/092864

Inventors:

Joseph Juh-En Cheng - Palo Alto CA, US
Wing Cheung - Fremont CA, US
John Michael Terry - San Jose CA, US
Suresh Vobbilisetty - San Jose CA, US
Surya P. Varanasi - Dublin CA, US
Parviz Ghalambor - Los Altos CA, US

Assignee:

Brocade Communications Systems, Inc. - San Jose CA

International Classification:

H04L 12/56

US Classification:

370401, 370217, 370244, 370392

Abstract:

One embodiment of the present invention provides a switch. The switch includes a forwarding mechanism and a control mechanism. During operation, the forwarding mechanism forwards frames based on their Ethernet headers. The control mechanism operates the switch in conjunction with a separate physical switch as a single logical switch and assigns a virtual switch identifier to the logical switch, wherein the virtual switch identifier is associated with a link aggregation group.

US Patent:

8625427, Jan 7, 2014

Filed:

Sep 3, 2009

Appl. No.:

12/553689

Inventors:

John M. Terry - San Jose CA, US
Joseph Juh-En Cheng - Palo Alto CA, US
Jan Bialkowski - San Jose CA, US

Assignee:

Brocade Communications Systems, Inc. - San Jose CA

International Classification:

G01R 31/08
G06F 11/00
G08C 15/00
H04J 1/16
H04J 3/14
H04L 1/00
H04L 12/26

US Classification:

370235, 370236, 370367, 370370, 370388, 370412, 370413, 370414, 370415, 370416, 370417, 370418

Abstract:

One embodiment of the present invention provides a system that facilitates flow control of multi-path-switched data frames. During operation the system transmits from an ingress edge device data frames destined to an egress edge device across different switched paths based on queue status of a core switching device and queue status of the egress edge device. The egress edge device is separate from the core switching device.

US Patent:

20080159277, Jul 3, 2008

Filed:

Dec 17, 2007

Appl. No.:

11/958348

Inventors:

Suresh Vobbilisetty - San Jose CA, US
John Michael Terry - San Jose CA, US

Assignee:

BROCADE COMMUNICATIONS SYSTEMS, INC. - San Jose CA

International Classification:

H04L 12/50

US Classification:

370357

Abstract:

A network architecture provides Ethernet services over a Fibre Channel (FC) storage area network infrastructure. The fabric provides transparent bridging services to Ethernet end stations connected at the edge of the FC fabric via multi-protocol switches that support Ethernet over Fibre Channel (EoFC) technology. An Ethernet frame is received from a first Ethernet edge network by an ingress Ethernet port of a first virtual bridge and is encapsulated in a FC frame shell to form an EoFC frame. The EoFC frame is then transmitted out an egress FC port of the first virtual bridge and routed through the FC fabric using an FC routing protocol. When the encapsulated frame reaches an ingress FC port of a second virtual bridge, the EoFC frame is de-encapsulated to yield the original Ethernet frame, which is transmitted out an egress Ethernet port of the second virtual bridge into a second Ethernet edge network.

US Patent:

20110299414, Dec 8, 2011

Filed:

Mar 15, 2011

Appl. No.:

13/048817

Inventors:

Shunjia Yu - San Jose CA, US
Anoop Ghanwani - Rocklin CA, US
Phanidhar Koganti - Sunnyvale CA, US
John Michael Terry - San Jose CA, US
Wing Cheung - Fremont CA, US
Joseph Juh-En Cheng - Palo Alto CA, US
Surya P. Varanasi - Dublin CA, US

Assignee:

BROCADE COMMUNICATIONS SYSTEMS, INC. - San Jose CA

International Classification:

H04L 12/26

US Classification:

370252

Abstract:

Systems and techniques for processing and/or forwarding packets are described. An ingress switch can use a QoS mapping mechanism to map a first set of Quality of Service (QoS) bits in a packet received from a customer to a second set of QoS bits for use in a Transparent Interconnection of Lots of Links (TRILL) packet which encapsulates the packet. The first set of QoS bits can be different from the second set of QoS bits. The TRILL packet can be processed and/or forwarded in the network based on the second set of QoS bits. At the egress switch, the TRILL packet can be decapsulated and the original packet with the original QoS bits (or QoS bits that are different from the original QoS bits) can be forwarded to the customer's network. In this manner, some embodiments of the present invention can preserve the QoS bits across a TRILL network.

US Patent:

20110299532, Dec 8, 2011

Filed:

Mar 9, 2011

Appl. No.:

13/044326

Inventors:

Shunjia Yu - San Jose CA, US
Phanidhar Koganti - Sunnyvale CA, US
John Michael Terry - San Jose CA, US
Dilip Chatwani - San Jose CA, US

Assignee:

BROCADE COMMUNICATIONS SYSTEMS, INC. - San Jose CA

International Classification:

H04L 12/56

US Classification:

370392

Abstract:

A switch that facilitates remote port mirroring is described. The switch can include an encapsulation mechanism and a forwarding mechanism. The encapsulation mechanism can be configured to encapsulate a copy of a first packet in a second packet, thereby preserving header information (e.g., a VLAN identifier and/or a TRILL header) of the first packet. The forwarding mechanism can be configured to forward the first packet using header information of the first packet, and forward the second packet using header information of the second packet. The second packet can be received at a destination switch which extracts the first packet from the second packet, and sends the first packet on a port which is coupled to a network analyzer.

US Patent:

20110299533, Dec 8, 2011

Filed:

Mar 17, 2011

Appl. No.:

13/050102

Inventors:

Shunjia Yu - San Jose CA, US
Anoop Ghanwani - Rocklin CA, US
Phanidhar Koganti - Sunnyvale CA, US
Mythilikanth Raman - San Jose CA, US
Rajiv Krishnamurthy - San Jose CA, US
John Michael Terry - San Jose CA, US
Wing Cheung - Fremont CA, US
Joseph Juh-En Cheng - Palo Alto CA, US
Surya P. Varanasi - Dublin CA, US

Assignee:

BROCADE COMMUNICATIONS SYSTEMS, INC. - San Jose CA

International Classification:

H04L 12/56

US Classification:

370392

Abstract:

Systems and techniques for processing and forwarding packets are described. Some embodiments provide a system (e.g., a switch) which determines an internal virtual network identifier and/or an internal policy identifier for a packet based on a port on which the packet was received and/or one or more fields in the packet. The system can then process and forward the packet based on the internal virtual network identifier and/or internal policy identifier. In some embodiments, the system encapsulates the packet in a TRILL (Transparent Interconnection of Lots of Links) packet by adding a TRILL header to the packet. In some embodiments, the scope of an internal virtual network identifier and/or an internal policy identifier may not extend beyond a switch or a module within a switch.