US Patent No: 5,761,435

Number of patents in Portfolio can not be more than 2000

Multiprocessor bridge having storage for spanning tree operation mode information indicating whether each port of the bridge is operable under spanning tree protocol

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Abstract

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A multiprocessor bridge construction allows ports that are operable under a spanning tree protocol to coexist with ports that are inoperable under the spanning tree protocol, thus making it possible to improve the frame-repeating capability of the bridge, to equip the bridge with a large number of ports, and to divide the spanning tree topology into a plurality of portions to be managed.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
HITACHI COMPUTER ENGINEERING CO., LTD.TOKYO10
HITACHI, LTD.TOKYO13771

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fukuda, Masashi Hadano, JP 22 123
Matsuo, Hideyuki Taga-gun, JP 10 112
Morimoto, Shigeki Atugi, JP 23 590
Murakami, Toshihiko Yokohama, JP 50 480
Sakoda, Hirpyuki Hadano, JP 1 81
Yoneno, Takunori Hadano, JP 2 92

Cited Art Landscape

Patent Info (Count) # Cites Year
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (2)
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* 5,448,565 Multiport LAN bridge 104 1992
 
ERICSSON AB (1)
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TELCORDIA TECHNOLOGIES, INC. (1)
* 4,706,080 Interconnection of broadcast networks 139 1985
 
ENTERASYS NETWORKS, INC. (3)
* 5,018,137 Transparent load sharing for parallel networks 101 1990
* 5,500,860 Router using multiple hop redirect messages to enable bridge like data forwarding 142 1991
* 5,195,181 Message processing system having separate message receiving and transmitting processors with message processing being distributed between the separate processors 99 1992
 
ROCKSTAR CONSORTIUM US LP (1)
* 5,490,252 System having central processor for transmitting generic packets to another processor to be altered and transmitting altered packets back to central processor for routing 453 1992
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
Fortinet, Inc. (5)
8,565,115 Adaptive load balancing 7 2012
8,660,007 Performing rate limiting within a network 3 2013
8,873,424 Adaptive load balancing 1 2013
8,917,604 Performing rate limiting within a network 1 2014
9,276,861 Selecting among multiple concurrently active paths through a network 0 2014
 
Other [Check patent profile for assignment information] (2)
* 2004/0105,455 Automatic edge port and one way connectivity detection with rapid reconfiguration for shared media in spanning tree configured bridged Local Area Networks 9 2003
* 2005/0259,597 Multiple instance spanning tree protocol 107 2005
 
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (1)
* 2008/0067,128 FLUID SEPARATION DEVICE 0 2007
 
HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP (9)
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* 6,195,351 Logical switch set 53 1998
6,330,229 Spanning tree with rapid forwarding database updates 83 1998
6,611,502 Spanning tree with rapid propagation of topology changes 32 1999
6,771,610 Spanning tree with protocol for bypassing port state transition timers 27 1999
* 2003/0016,624 Path recovery on failure in load balancing switch protocols 31 2002
* 6,697,339 High availability spanning tree with rapid reconfiguration with alternate port selection 54 2003
6,934,263 Spanning tree with protocol for bypassing port state transition timers 11 2004
* 2010/0115,415 GRAPHIC FOR NETWORK SWITCHES 13 2008
 
CISCO TECHNOLOGY, INC. (27)
* 6,188,694 Shared spanning tree protocol 181 1997
6,628,624 Value-added features for the spanning tree protocol 98 1998
6,535,491 Method and apparatus for rapidly reconfiguring computer networks using a spanning tree algorithm 84 1999
6,388,995 Method and apparatus for rapidly reconfiguring computers networks executing the spanning tree algorithm 98 1999
6,678,241 Fast convergence with topology switching 84 1999
6,898,189 Restartable spanning tree for high availability network systems 53 2000
* 6,219,739 Spanning tree with fast link-failure convergence 73 2000
6,937,576 Multiple instance spanning tree protocol 86 2000
7,061,858 High availability architecture for network devices 78 2000
6,813,250 Shared spanning tree protocol 63 2000
* 7,013,347 Distance vector extension to the address resolution protocol 5 2001
7,177,946 Optimal sync for rapid spanning tree protocol 32 2001
6,976,088 Method and apparatus for rapidly reconfiguring bridged networks using a spanning tree algorithm 27 2002
7,342,877 Method and system for providing a loop-free ring topology 8 2003
7,602,706 Inter-ring protection for shared packet rings 8 2003
7,606,177 Value-added features for the spanning tree protocol 7 2003
7,428,237 Fast convergence with topology switching 21 2004
* 7,848,264 Method and apparatus for rapidly reconfiguring computer networks 14 2005
7,599,284 Restartable spanning tree for high availability network systems 21 2005
8,165,043 Multiple instance spanning tree protocol 2 2005
7,995,499 Minimizing spanning-tree protocol event processing and flooding in distribution networks 2 2006
* 2008/0123,561 Minimizing Spanning-Tree Protocol Event Processing and Flooding in Distribution Networks 3 2006
7,558,878 Optimal sync for rapid spanning tree protocol 3 2007
* 2007/0124,498 Optimal SYNC for rapid spanning tree protocol 8 2007
8,077,709 Redundancy at a virtual provider edge node that faces a tunneling protocol core network for virtual private local area network (LAN) service (VPLS) 8 2007
8,650,285 Prevention of looping and duplicate frame delivery in a network environment 0 2011
8,650,286 Prevention of looping and duplicate frame delivery in a network environment 2 2011
 
CONEXANT SYSTEMS UK LIMITED (1)
* 6,111,858 Proxy-controlled ATM subnetwork 182 1997
 
SONY ELECTRONICS INC. (14)
* 5,940,597 Method and apparatus for periodically updating entries in a content addressable memory 42 1997
* 5,884,040 Per-packet jamming in a multi-port bridge for a local area network 78 1997
* 6,012,099 Method and integrated circuit for high-bandwidth network server interfacing to a local area network 19 1997
6,446,173 Memory controller in a multi-port bridge for a local area network 26 1998
6,256,313 Triplet architecture in a multi-port bridge for a local area network 10 1998
6,301,256 Selection technique for preventing a source port from becoming a destination port in a multi-port bridge for a local area network 15 1998
* 6,157,951 Dual priority chains for data-communication ports in a multi-port bridge for a local area network 18 1998
6,308,218 Address look-up mechanism in a multi-port bridge for a local area network 57 1998
6,816,490 Statistical learning technique in a multi-port bridge for a local area network 16 1999
6,751,225 Port within a multi-port bridge including a buffer for storing routing information for data packets received in the port 17 1999
6,744,728 Data pipeline timing optimization technique in a multi-port bridge for a local area network 10 1999
6,738,384 Technique for optimizing cut-through for broadcast and multi-cast packets in a multi-port bridge for a local area network 14 1999
6,617,879 Transparently partitioned communication bus for multi-port bridge for a local area network 60 1999
6,363,067 Staged partitioned communication bus for a multi-port bridge for a local area network 20 1999
 
FUJITSU LIMITED (1)
* 6,813,238 Cable modem and cable modem system 3 1999
 
SUN MICROSYSTEMS, INC. (2)
6,094,435 System and method for a quality of service in a multi-layer network element 180 1997
6,061,362 Interface for a highly integrated ethernet network element 31 1999
 
ORACLE AMERICA, INC. (12)
6,246,680 Highly integrated multi-layer switch element architecture 90 1997
* 6,128,666 Distributed VLAN mechanism for packet field replacement in a multi-layered switched network element using a control field/signal for indicating modification of a packet with a database search engine 180 1997
6,088,356 System and method for a multi-layer network element 209 1997
6,081,512 Spanning tree support in a high performance network device 144 1997
6,081,522 System and method for a multi-layer network element 134 1997
* 6,052,738 Method and apparatus in a packet routing switch for controlling access at different data rates to a shared memory 33 1997
6,049,528 Trunking ethernet-compatible networks 221 1997
* 6,044,087 Interface for a highly integrated ethernet network element 25 1997
6,044,418 Method and apparatus for dynamically resizing queues utilizing programmable partition pointers 34 1997
6,016,310 Trunking support in a high performance network device 127 1997
* 5,938,736 Search engine architecture for a high performance multi-layer switch element 200 1997
* 7,339,900 Method and apparatus for preventing spanning tree loops during traffic overload conditions 12 2003
 
NEC CORPORATION (6)
* 6,003,137 Virtual group information managing method in bridge for network connection 25 1997
* 7,280,488 Communication device, network system using same, and method of constructing spanning tree 3 2002
* 7,136,390 Communication apparatus, communication system, and communication control method 1 2002
* 2002/0181,413 Communication apparatus, communication system, and communication control method 4 2002
* 7,532,588 Network system, spanning tree configuration method and configuration program, and spanning tree configuration node 4 2003
* 2004/0160,904 Network system, spanning tree configuration method and configuration program, and spanning tree configuration node 19 2003
 
INTEL CORPORATION (1)
6,628,661 Spanning tree recovery in computer networks 28 1999
 
FOUNDRY NETWORKS, LLC (10)
* 7,564,858 System and method for enabling a remote instance of a loop avoidance protocol 15 2003
7,558,205 System and method for detecting and isolating a remote loop 16 2003
7,822,049 System and method for enabling a remote instance of a loop avoidance protocol 6 2005
7,944,816 System and method for detecting and isolating a remote loop 1 2009
* 2009/0225,668 System and Method For Detecting And Isolating A Remote Loop 1 2009
7,856,490 System and method for multiple spanning tree protocol domains in a virtual local area network 1 2009
8,345,699 System and method for enabling a remote instance of a loop avoidance protocol 0 2010
* 2011/0064,001 SYSTEM AND METHOD FOR ENABLING A REMOTE INSTANCE OF A LOOP AVOIDANCE PROTOCOL 1 2010
8,817,666 System and method for multiple spanning tree protocol domains in a virtual local area network 0 2010
8,446,819 System and method for detecting and isolating a remote loop 0 2011
 
OLLCOM A/S (2)
6,940,825 Spanning tree recovery in machine networks 6 2003
* 2004/0062,209 Spanning tree recovery in machine networks 11 2003
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
* 2003/0149,757 Identification code management system for home network 4 2003
* Cited By Examiner