US Patent No: 5,473,599

Number of patents in Portfolio can not be more than 2000

Standby router protocol

4 Status Updates

Stats

ATTORNEY / AGENT: (SPONSORED)
 

Importance

Loading Importance Indicators... loading....

Abstract

A system and protocol are provided for routing data packets from a host on a LAN through a virtual address belonging to a group of routers. The host is configured to point to the virtual address so that the packets it sends out of its LAN are always directed to a virtual router which may be any one of the group of routers. An active router in the group of routers emulates the virtual router. A standby router, also from the group of routers, backs up the active router so that if the active router becomes inoperative, the standby router automatically begins emulating the virtual router. The host router does not know which router from the group is actually handling the data packets it sends. If the standby router becomes inoperative or takes over for the active router, other routers in the group hold an election to determine which of them should take over for the standby router.

Loading the Abstract Image... loading....

First Claim

Related Publications

Loading Related Publications... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
CISCO TECHNOLOGY, INC.SAN JOSE, CA9213

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cole, Bruce A San Francisco, CA 10 795
Li, Anthony J San Mateo, CA 19 628

Cited Art

Patent Info (Count) # Cites Year
 
BELL TELEPHONE LABORATORIES, INCORPORATED (1)
4,692,918 Reliable local data network arrangement 247 1984
 
HITACHI, LTD. (1)
5,018,133 Network system comprising a plurality of LANs using hierarchical routing 189 1990
 
HONEYWELL INC. (1)
5,016,244 Method for controlling failover between redundant network interface modules 148 1989
 
RICHARD HIRSCHMANN GMBH & CO. (1)
5,218,600 Process for networking computers and/or computer networks and networking systems 102 1990

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
CISCO TECHNOLOGY, INC. (240)
5,793,978 System for routing packets by separating packets in to broadcast packets and non-broadcast packets and allocating a selected communication bandwidth to the broadcast packets 53 1994
5,737,526 Network having at least two routers, each having conditional filter so one of two transmits given frame and each transmits different frames, providing connection to a subnetwork 66 1994
6,091,725 Method for traffic management, traffic prioritization, access control, and packet forwarding in a datagram computer network 157 1995
6,182,224 Enhanced network services using a subnetwork of communicating processors 26 1996
6,097,718 Snapshot routing with route aging 47 1996
6,035,105 Multiple VLAN architecture system 114 1996
6,243,667 Network flow switching and flow data export 157 1996
6,212,182 Combined unicast and multicast scheduling 50 1996
5,835,481 Fault tolerant lane system 58 1996
6,240,084 Telephony-enabled network processing device with separate TDM bus and host system backplane bus 51 1996
6,904,037 Asymmetric implementation of DSVD for voice/data internet access 11 1996
6,304,546 End-to-end bidirectional keep-alive using virtual circuits 33 1996
6,308,148 Network flow data export 52 1996
6,088,430 Communication server apparatus and method 21 1997
6,151,325 Method and apparatus for high-capacity circuit switching with an ATM second stage switch 24 1997
6,104,717 System and method for providing backup machines for implementing multiple IP addresses on multiple ports 39 1997
6,356,530 Next hop selection in ATM networks 5 1997
6,122,272 Call size feedback on PNNI operation 19 1997
6,889,181 Network flow switching and flow data export 15 1997
6,078,590 Hierarchical routing knowledge for multicast packet routing 86 1997
6,512,766 Enhanced internet packet routing lookup 15 1997
6,212,183 Multiple parallel packet routing lookup 43 1997
6,157,641 Multiprotocol packet recognition and switching 38 1997
6,366,644 Loop integrity test device and method for digital subscriber line (XDSL) communication 23 1997
6,163,599 Communication server apparatus and method 14 1997
6,065,062 Backup peer pool for a routed computer network 70 1997
6,343,072 Single-chip architecture for shared-memory router 67 1997
6,111,877 Load sharing across flows 36 1997
6,385,203 Communication server apparatus and method 78 1998
6,278,728 Remote XDSL transceiver unit and method of operation 12 1998
6,853,638 Route/service processor scalability via flow-based distribution of traffic 5 1998
6,678,282 System and method for communicating packetized data over a channel bank 14 1998
6,920,112 Sampling packets for network monitoring 18 1998
6,370,121 Method and system for shortcut trunking of LAN bridges 20 1998
6,377,577 Access control list processing in hardware 76 1998
6,195,705 Mobile IP mobility agent standby protocol 331 1998
6,308,219 Routing table lookup implemented using M-trie having nodes duplicated in multiple memory banks 49 1998
6,182,147 Multicast group routing using unidirectional links 42 1998
6,389,506 Block mask ternary cam 68 1998
6,101,115 CAM match line precharge 31 1998
6,535,520 System and method of operation for managing data communication between physical layer devices and ATM layer devices 3 1998
6,269,096 Receive and transmit blocks for asynchronous transfer mode (ATM) cell delineation 14 1998
6,434,120 Autosensing LMI protocols in frame relay networks 10 1998
6,381,245 Method and apparatus for generating parity for communication between a physical layer device and an ATM layer device 3 1998
6,330,599 Virtual interfaces with dynamic binding 15 1998
6,167,445 Method and apparatus for defining and implementing high-level quality of service policies in computer networks 444 1998
6,460,146 System and method for establishing processor redundancy 8 1998
6,286,048 System and method for discovering relative states of processors 8 1998
6,286,052 Method and apparatus for identifying network data traffic flows and for applying quality of service treatments to the flows 159 1998
6,700,872 Method and system for testing a utopia network element 4 1998
6,535,511 Method and system for identifying embedded addressing information in a packet for translation between disparate addressing systems 37 1999
6,453,357 Method and system for processing fragments and their out-of-order delivery during address translation 17 1999
6,771,642 Method and apparatus for scheduling packets in a packet switch 5 1999
6,760,444 Mobile IP authentication 85 1999
6,636,498 Mobile IP mobile router 103 1999
6,501,746 Mobile IP dynamic home address resolution 47 1999
6,449,655 Method and apparatus for communication between network devices operating at different frequencies 8 1999
6,751,233 UTOPIA 2--UTOPIA 3 translator 7 1999
6,724,724 System and method for resolving an electronic address 11 1999
6,337,861 Method and apparatus to properly route ICMP messages in a tag-switching network 51 1999
6,512,768 Discovery and tag space identifiers in a tag distribution protocol (TDP) 29 1999
7,065,762 Method, apparatus and computer program product for borrowed-virtual-time scheduling 6 1999
6,219,699 Multiple VLAN Architecture system 71 1999
6,757,791 Method and apparatus for reordering packet data units in storage queues for reading and writing memory 25 1999
6,618,377 Flexible scheduling of network devices within redundant aggregate configurations 16 1999
6,760,331 Multicast routing with nearest queue first allocation and dynamic and static vector quantization 4 1999
6,603,772 Multicast routing with multicast virtual output queues and shortest queue first allocation 15 1999
6,603,769 Method and system for improving traffic operation in an internet environment 51 1999
6,621,810 Mobile IP intra-agent mobility 72 1999
6,466,964 Methods and apparatus for providing mobility of a node that does not support mobility 160 1999
6,751,191 Load sharing and redundancy scheme 92 1999
6,781,956 System and method for prioritizing packetized data from a distributed control environment for transmission through a high bandwidth link 9 1999
6,952,421 Switched Ethernet path detection 21 1999
6,701,448 Establishing and maintaining master and standby LAN emulation server connections to provide a fault tolerant ELAN 6 1999
6,658,595 Method and system for asymmetrically maintaining system operability 28 1999
6,798,776 Method for traffic management, traffic prioritization, access control, and packet forwarding in a datagram computer network 17 2000
7,058,007 Method for a cable modem to rapidly switch to a backup CMTS 32 2000
6,839,829 Routing protocol based redundancy design for shared-access networks 40 2000
6,738,826 Router software upgrade employing redundant processors 10 2000
7,130,629 Enabling services for multiple sessions using a single mobile node 26 2000
6,298,063 System and method for providing backup machines for implementing multiple IP addresses on multiple ports 24 2000
6,831,923 Pipelined multiple issue packet switch 51 2000
6,327,251 Snapshot routing 8 2000
6,765,892 Optimizing IP multicast data transmission in a mobile IP environment 29 2000
6,982,967 Methods and apparatus for implementing a proxy mobile node in a wireless local area network 46 2000
6,963,918 Voice over IP optimization for mobile IP 8 2000
6,603,765 Load sharing across flows 9 2000
7,042,864 Enabling push technologies for mobile IP 10 2000
7,487,232 Switch management system and method 1 2000
6,611,528 Hierarchical routing knowledge for multicast packet routing 20 2000
6,487,605 Mobile IP mobility agent standby protocol 127 2000
7,185,073 Method and apparatus for defining and implementing high-level quality of service policies in computer networks 102 2000
7,042,876 Stateful network address translation protocol implemented over a data network 35 2000
6,640,243 Enhanced network services using a subnetwork of communicating processors 3 2000
6,959,341 Dynamic network allocation for mobile router 15 2000
6,885,667 Redirection to a virtual router 26 2000
7,295,551 Support mobile device in asymmetric link environment 4 2000
7,152,238 Enabling mobility for point to point protocol (PPP) users using a node that does not support mobility 23 2000
6,538,988 End-to-end bidirectional keep-alive using virtual circuits 11 2001
7,174,387 Methods and apparatus for requesting link state information 13 2001
7,116,669 Format for automatic generation of unique ATM addresses used for PNNI 1 2001
7,881,208 Gateway load balancing protocol 9 2001
6,434,624 Method and apparatus for identifying network data traffic flows and for applying quality of service treatments to the flows 47 2001
7,020,140 Receive and transmit blocks for asynchronous transfer mode (ATM) cell delineation 0 2001
7,065,059 Technique for restoring adjacencies in OSPF in a non-stop forwarding intermediate node of a computer network 25 2001
7,036,143 Methods and apparatus for virtual private network based mobility 18 2001
7,227,863 Methods and apparatus for implementing home agent redundancy 20 2001
7,051,109 Methods and apparatus for using SCTP to provide mobility of a network device 9 2001
7,409,549 Methods and apparatus for dynamic home agent assignment in mobile IP 11 2001
7,227,838 Enhanced internal router redundancy 14 2001
7,116,634 TCP sequence number recovery in a redundant forwarding system 9 2001
7,079,520 Methods and apparatus for implementing NAT traversal in mobile IP 20 2001
7,076,543 Method and apparatus for collecting, aggregating and monitoring network management information 19 2002
7,471,661 Methods and apparatus for supporting proxy mobile IP registration in a wireless local area network 5 2002
7,284,057 Methods and apparatus for Mobile IP Home Agent clustering 8 2002
7,421,478 Method and apparatus for exchanging heartbeat messages and configuration information between nodes operating in a master-slave configuration 13 2002
7,389,332 Method and apparatus for supporting communications between nodes operating in a master-slave configuration 8 2002
7,587,465 Method and apparatus for configuring nodes as masters or slaves 16 2002
7,415,535 Virtual MAC address system and method 14 2002
7,353,259 Method and apparatus for exchanging configuration information between nodes operating in a master-slave configuration 27 2002
7,200,610 System and method for configuring fibre-channel devices 40 2002
7,188,194 Session-based target/LUN mapping for a storage area network and associated method 31 2002
7,165,258 SCSI-based storage area network having a SCSI router that routes traffic between SCSI and IP networks 20 2002
7,587,498 Methods and apparatus for mobile IP dynamic home agent allocation 5 2002
7,346,053 Methods and apparatus for supporting IP multicast for a mobile router 18 2002
7,240,098 System, method, and software for a virtual host bus adapter in a storage-area network 26 2002
8,140,888 High availability network processing system 0 2002
7,486,611 Standby router protocol using optimal route metric 11 2002
7,248,560 Method and system for router redundancy in a wide area network 29 2002
7,203,192 Network packet steering 31 2002
6,944,672 Method and system for processing fragments and their out-of-order delivery during address translation 16 2002
8,001,269 Network address translation with IP redundancy 2 2002
7,286,525 Synchronous pipelined switch using serial transmission 1 2002
7,103,007 Autosensing LMI protocols in frame relay networks 2 2002
7,280,557 Mechanisms for providing stateful NAT support in redundant and asymetric routing environments 23 2002
7,174,376 IP subnet sharing technique implemented without using bridging or routing protocols 8 2002
6,651,101 Method and apparatus for identifying network data traffic flows and for applying quality of service treatments to the flows 105 2002
7,227,872 Mechanisms for providing stateful NAT support in redundant and asymetric routing environments 25 2002
6,795,857 Methods and apparatus for providing mobility of a node that does not support mobility 64 2002
7,152,179 IP redundancy with improved failover notification 24 2002
7,379,433 Methods and apparatus for broadcast optimization in mobile IP 2 2002
7,194,653 Network router failover mechanism 17 2002
7,707,310 Mobile IP registration supporting port identification 1 2002
7,447,183 Mobile IP dynamic Home Address resolution 4 2002
7,457,289 Inter-proxy communication protocol for mobile IP 7 2002
7,870,389 Methods and apparatus for authenticating mobility entities using kerberos 5 2002
7,286,529 Discovery and tag space identifiers in a tag distribution protocol (TDP) 4 2003
7,362,742 Methods and apparatus for synchronizing subnet mapping tables 8 2003
7,006,520 System and method of operation for managing data communication between physical layer devices and ATM layer devices 1 2003
7,831,736 System and method for supporting VLANs in an iSCSI 0 2003
7,295,572 Storage router and method for routing IP datagrams between data path processors using a fibre channel switch 1 2003
7,904,599 Synchronization and auditing of zone configuration data in storage-area networks 2 2003
7,814,232 Network address translation with gateway load distribution 1 2003
7,433,300 Synchronization of configuration data in storage-area networks 10 2003
7,526,527 Storage area network interconnect server 1 2003
7,433,952 System and method for interconnecting a storage area network 1 2003
7,599,370 Methods and apparatus for optimizing NAT traversal in Mobile IP 2 2003
7,505,432 Methods and apparatus for securing proxy Mobile IP 8 2003
7,620,056 Flexible scheduling of network devices within redundant aggregate configurations 0 2003
7,451,208 Systems and methods for network address failover 2 2003
7,535,871 Mobile IP intra-agent mobility 0 2003
7,593,346 Distributing and balancing traffic flow in a virtual gateway 8 2003
7,352,731 Mobile IP mobile router 10 2003
7,751,416 Virtual network device 8 2003
7,178,052 High availability virtual switch 18 2003
6,917,966 Enhanced network services using a subnetwork of communicating processors 0 2003
7,729,267 Method and apparatus for analyzing a media path in a packet switched network 0 2003
7,006,431 Load sharing and redundancy scheme 39 2003
7,443,858 Method for traffic management, traffic prioritization, access control, and packet forwarding in a datagram computer network 4 2003
7,417,961 Methods and apparatus for implementing a speed sensitive mobile router 6 2003
7,836,296 Method for blocking denial of service and address spoofing attacks on a private network 0 2004
8,208,370 Method and system for fast link failover 1 2004
7,839,843 Distributed forwarding in virtual network devices 0 2004
7,610,405 Router software upgrade employing redundant processors 2 2004
7,889,733 Intelligent adjunct network device 0 2004
7,840,988 Front-end structure for access network line card 0 2004
7,706,364 Virtual network device clusters 0 2004
7,710,957 System and method for implementing multiple spanning trees per network 1 2004
7,168,090 Mobile IP authentication 13 2004
7,447,188 Methods and apparatus for supporting mobile IP proxy registration in a system implementing mulitple VLANs 4 2004
7,079,504 Optimizing IP multicast data transmission in a mobile IP environment 7 2004
7,808,983 Network device architecture for centralized packet processing 1 2004
7,489,636 System and method for prioritizing packetized data from distributed control environment for transmission through a high bandwidth link 0 2004
7,966,409 Routing protocol based redundancy design for shared-access networks 1 2004
7,822,025 Network device architecture for centralized packet processing 1 2004
7,260,518 Network flow switching and flow data report 14 2004
7,639,802 Methods and apparatus for bootstrapping Mobile-Foreign and Foreign-Home authentication keys in Mobile IP 5 2004
7,411,925 Network route processor using state-based switchover 14 2004
7,502,331 Infrastructure-less bootstrapping: trustless bootstrapping to enable mobility for mobile devices 6 2004
7,616,613 Internet protocol authentication in layer-3 multipoint tunneling for wireless access points 0 2004
8,059,661 Methods and apparatus for using DHCP for home address management of nodes attached to an edge device and for performing mobility and address management as a proxy home agent 0 2004
7,656,788 High-reliability cluster management 2 2005
7,570,583 Extending SONET/SDH automatic protection switching 2 2005
7,136,383 Redirection to a virtual router 18 2005
7,486,610 Multiple virtual router group optimization 12 2005
7,246,148 Enhanced network services using a subnetwork of communicating processors 4 2005
7,636,302 Avoiding unnecessary RSVP-based preemptions 0 2005
8,077,604 Load sharing and redundancy scheme 0 2005
7,746,874 Dynamic network allocation for mobile router 0 2005
7,580,391 Dynamic network allocation for mobile router 4 2005
7,626,963 EAP/SIM authentication for mobile IP to leverage GSM/SIM authentication infrastructure 6 2005
7,324,492 Enabling push technologies for mobile IP 4 2005
7,894,427 Stateful network address translation protocol implemented over a data network 1 2006
7,835,378 Root node redundancy for multipoint-to-multipoint transport trees 1 2006
7,903,585 Topology discovery of a private network 0 2006
7,787,361 Hybrid distance vector protocol for wireless mesh networks 2 2006
7,633,917 Mobile network device multi-link optimizations 2 2006
7,246,373 Methods and apparatus for virtual private network based mobility 10 2006
7,457,882 Methods and apparatus for using SCTP to provide mobility of a network device 6 2006
7,986,730 Methods and apparatus for updating a reduction ratio 0 2006
7,506,073 Session-based target/LUN mapping for a storage area network and associated method 4 2006
7,318,094 Apparatus, system and device for collecting, aggregating and monitoring network management information 3 2006
8,358,635 Methods and apparatus for implementing NAT traversal in mobile IP 0 2006
7,639,699 Technique for sharing a physical port among a plurality of virtual bridges on a switch in a computer network 0 2006
7,660,318 Internetworking support between a LAN and a wireless mesh network 0 2006
7,539,744 Network operating system for maintaining redundant master control blade management information 2 2006
8,069,233 Switch management system and method 0 2006
7,421,077 Mobile IP authentication 0 2006
7,817,664 Mobile IP accounting 0 2006
7,895,312 IP subnet sharing technique implemented without using bridging or routing protocols 0 2006
7,738,383 Traceroute using address request messages 0 2006
7,630,352 Support mobile device in asymmetric link environment 0 2006
7,437,477 SCSI-based storage area network having a SCSI router that routes traffic between SCSI and IP networks 6 2007
7,366,791 SCSI-based storage area network having a SCSI router that routes traffic between SCSI and IP networks 0 2007
7,706,278 Triggering flow analysis at intermediary devices 1 2007
7,694,168 Network router failover mechanism 0 2007
8,068,503 Network packet steering via configurable association of processing resources and netmods or line interface ports 3 2007
7,693,048 Enhanced internal router redundancy 2 2007
7,856,480 Method and apparatus for exchanging heartbeat messages and configuration information between nodes operating in a master-slave configuration 2 2007
7,554,903 Method and system for router redundancy in a wide area network 0 2007
8,243,681 Methods and apparatus for broadcast optimization in mobile IP 0 2008
8,059,652 Method and apparatus for detecting support for a protocol defining supplemental headers 0 2008
7,730,210 Virtual MAC address system and method 3 2008
8,401,027 Method for traffic management, traffic prioritization, access control, and packet forwarding in a datagram computer network 0 2008
8,422,467 Methods and apparatus for supporting proxy mobile IP registration in a wireless local area network 0 2008
8,259,676 Methods and apparatus for securing proxy mobile IP 0 2009
8,433,521 Avoiding unnecessary RSVP-based preemptions 0 2009
7,818,004 Mobile network device multi-link optimizations 1 2009
8,165,290 Methods and apparatus for bootstrapping mobile-foreign and foreign-home authentication keys in mobile IP 1 2009
8,170,552 Mobile network device multi-link optimizations 0 2010
 
CITRIX SYSTEMS, INC. (34)
5,862,348 Method and apparatus for connecting a client node to a server node based on load levels 96 1996
6,370,552 Apparatus and method for displaying application output in an HTML document 33 1997
5,961,586 System and method for remotely executing an interpretive language application 80 1997
6,601,084 Dynamic load balancer for multiple network servers 95 1997
6,266,335 Cross-platform server clustering using a network flow switch 85 1997
5,963,540 Router pooling in a network flowswitch 73 1997
6,370,570 Method and apparatus for making a hypermedium interactive 31 1999
6,438,598 System and method for transmitting data from a server application to more than one client node 14 1999
6,880,089 Firewall clustering for multiple network servers 62 2000
6,779,039 System and method for routing message traffic using a cluster of routers sharing a single logical IP address distinct from unique IP addresses of the routers 82 2000
7,055,173 Firewall pooling in a network flowswitch 48 2000
6,922,724 Method and apparatus for managing server load 96 2000
6,789,112 Method and apparatus for administering a server having a subsystem in communication with an event channel 27 2000
6,785,726 Method and apparatus for delivering local and remote server events in a similar fashion 66 2000
6,799,209 Activity monitor and resource manager in a network environment 39 2000
6,772,226 VPN device clustering using a network flow switch and a different mac address for each VPN device in the cluster 36 2000
6,826,606 Method and apparatus for communicating among a network of servers 55 2001
6,807,580 Method and apparatus for communicating among a network of servers 33 2001
6,950,991 Interacting with software applications displayed in a web page 37 2002
6,691,157 Method and apparatus for making a hypermedium interactive 25 2002
7,555,529 Interacting with software applications displayed in a web page 12 2002
7,359,953 Methods and apparatus for making a hypermedium interactive 22 2003
7,748,032 Method and apparatus for associating tickets in a ticket hierarchy 0 2004
7,711,835 Method and apparatus for reducing disclosure of proprietary data in a networked environment 7 2004
7,870,294 Method and apparatus for providing policy-based document control 2 2004
7,865,603 Method and apparatus for assigning access control levels in providing access to networked content files 3 2004
8,024,568 Method and system for verification of an endpoint security scan 0 2005
8,065,423 Method and system for assigning access control levels in providing access to networked content files 4 2006
8,090,793 Methods and apparatus for making a hypermedium interactive 0 2008
8,296,446 System and method for transmitting data from a server application to more than one client node 0 2008
8,286,230 Method and apparatus for associating tickets in a ticket hierarchy 0 2010
8,312,261 Method and system for verification of an endpoint security scan 0 2011
8,352,606 Method and system for assigning access control levels in providing access to networked content files 0 2011
8,285,782 Methods and apparatus for making a hypermedium interactive 0 2011
 
MICROSOFT CORPORATION (18)
5,933,599 Apparatus for presenting the content of an interactive on-line network 71 1995
5,956,509 System and method for performing remote requests with an on-line service network 169 1995
5,941,947 System and method for controlling access to data entities in a computer network 382 1995
5,956,489 Transaction replication system and method for supporting replicated transaction-based services 153 1996
5,644,706 Failure detection and reporting for a computer mail gateway 34 1996
6,901,433 System for providing users with a filtered view of interactive network directory obtains from remote properties cache that provided by an on-line service 44 1998
6,430,607 System and method for performing remote requests with an on-line service network 44 1998
6,289,390 System and method for performing remote requests with an on-line service network 38 1998
6,978,364 VPN enrollment protocol gateway 18 2000
7,987,233 System and methods for facilitating a multiparty communications session with a dynamically designated session manager 0 2003
7,100,046 VPN enrollment protocol gateway 10 2004
7,577,092 Directory service for a computer network 10 2004
7,502,832 Distributed directory service using junction nodes for providing network users with an integrated hierarchical directory services 14 2004
7,437,431 Method for downloading an icon corresponding to a hierarchical directory structure from a directory service 6 2004
7,305,451 System for providing users an integrated directory service containing content nodes located in different groups of application servers in computer network 7 2004
7,069,441 VPN enrollment protocol gateway 1 2004
7,171,556 VPN enrollment protocol gateway 2 2005
7,350,073 VPN enrollment protocol gateway 0 2006
 
SCIENTIFIC-ATLANTA, INC. (18)
6,230,203 System and method for providing statistics for flexible billing in a cable environment 119 1997
6,324,267 Two-tiered authorization and authentication for a cable data delivery system 19 1997
6,618,353 Router for use with a link that has a set of concurrent channels 22 1997
6,301,223 Method of using routing protocols to reroute packets during a link failure 68 1997
6,249,523 Router for which a logical network address which is not unique to the gateway address in default routing table entries 54 1997
6,208,656 Methods for dynamically assigning link addresses and logical network addresses 92 1997
6,178,455 Router which dynamically requests a set of logical network addresses and assigns addresses in the set to hosts connected to the router 133 1997
6,286,058 Apparatus and methods for automatically rerouting packets in the event of a link failure 30 1997
6,272,150 Cable modem map display for network management of a cable data delivery system 132 1997
6,282,208 Data traffic control in a data modem system 34 1997
6,467,091 Constant bit rate transport in a contention based medium access control 10 1999
7,028,088 System and method for providing statistics for flexible billing in a cable environment 8 2000
6,405,253 Dynamic allocation of a set of addresses to router RF modem for individual assignment to hosts 26 2000
6,922,412 Methods for dynamically assigning link addresses and logical network addresses 8 2001
6,529,517 Router for which a logical network address which is not unique to the router is the gateway address in default routing table entries 18 2001
6,519,224 Method of using routing protocols to reroute packets during a link failure 15 2001
7,099,308 Router for use with a link that has a set of concurrent channels 4 2003
6,983,327 System and method for providing statistics for flexible billing in a cable environment 9 2003
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (17)
5,802,258 Loosely coupled system environment designed to handle a non-disruptive host connection switch after detection of an error condition or during a host outage or failure 92 1996
5,727,142 Method for a non-disruptive host connection switch after detection of an error condition or during a host outage or failure 50 1996
5,959,974 System and method for discovering path MTU of internet paths 50 1996
5,892,753 System and method for dynamically refining PMTU estimates in a multimedia datastream internet system 50 1996
5,917,997 Host identity takeover using virtual internet protocol (IP) addressing 74 1996
6,012,150 Apparatus for synchronizing operator initiated commands with a failover process in a distributed processing system 17 1997
5,875,290 Method and program product for synchronizing operator initiated commands with a failover process in a distributed processing system 52 1997
5,949,753 Redundant internet protocol gateways using local area network emulation 36 1997
5,983,281 Load balancing in a multiple network environment 58 1997
6,021,507 Method for a non-disruptive host connection switch after detection of an error condition or during a host outage or failure 45 1997
5,870,589 Method for enhanced broadcast and unknown server operation 10 1997
6,148,410 Fault tolerant recoverable TCP/IP connection router 191 1997
6,507,863 Dynamic multicast routing facility for a distributed computing environment 32 1999
7,003,581 System and method for improved load balancing and high availability in a data processing system having an IP host with a MARP layer 7 2000
6,931,452 Router monitoring 13 2000
7,769,839 Method and structure for autoconfiguration of overlay networks by automatic selection of a network designated router 0 2002
7,580,370 Method and structure for autoconfiguration of network destinations 3 2002
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (15)
6,496,940 Multiple processor system with standby sparing 66 1995
5,796,742 Bi-diredctional wire-line to local area network interface and method 30 1997
6,134,678 Method of detecting network errors 21 1997
6,105,151 System for detecting network errors 17 1997
6,195,351 Logical switch set 40 1998
6,058,116 Interconnected trunk cluster arrangement 25 1998
6,397,260 Automatic load sharing for network routers 84 1999
7,275,113 Dynamic network address configuration system and method 4 1999
6,966,003 System and method for switching security associations 7 2001
7,009,952 Method and apparatus for seamless mobility with layer two assistance 95 2001
6,826,154 Method and apparatus for seamless mobility between different access technologies 90 2001
7,274,703 Stackable network units with resiliency facility 9 2002
8,045,566 Automated router load balancing 0 2003
7,136,931 Method and system for identifying the health of virtual routers 8 2003
7,929,421 Application driven router redundancy protocol 0 2004
 
FORTINET, INC. (12)
7,574,495 System and method for managing interworking communications protocols 15 2000
7,444,398 System and method for delivering security services 16 2000
8,250,357 Tunnel interface for securing traffic over a network 0 2001
7,376,125 Service processing switch 45 2002
7,340,535 System and method for controlling routing in a virtual router system 37 2002
7,266,120 System and method for hardware accelerated packet multicast in a virtual routing system 42 2002
7,890,663 Identifying nodes in a ring network 4 2006
8,260,918 Packet routing system and method 0 2006
8,085,776 Methods and systems for a distributed provider edge 0 2006
7,580,373 Identifying nodes in a ring network 1 2006
7,639,632 System and method for managing and provisioning virtual routers 17 2006
8,064,462 Service processing switch 2 2010
 
WATCHGUARD TECHNOLOGIES, INC. (9)
6,732,199 Software programmable calendar queue cache 3 1999
6,560,238 Calendar queue cache 2 1999
6,542,508 Policy engine using stream classifier and policy binding database to associate data packet with appropriate action processor for processing without involvement of a host processor 41 1999
6,751,668 Denial-of-service attack blocking with selective passing and flexible monitoring 24 2000
7,117,530 Tunnel designation system for virtual private networks 16 2000
7,006,502 System using stream specification and action specification stored in policy cache to process the flow of data packets by appropriate action processor 1 2003
7,420,976 System directing flow of packets by-passing policy-based application for processing by policy engine according to action specification in policy cache 0 2006
7,882,558 Tunnel designation system for virtual private networks 0 2006
7,773,604 System directing flow of packets by-passing policy-based application for processing by policy engine according to action specification in policy cache 1 2008
 
GOOGLE INC. (8)
7,177,311 System and method for routing traffic through a virtual router-based network switch 96 2002
7,161,904 System and method for hierarchical metering in a virtual router based network switch 51 2002
7,096,383 System and method for virtual router failover in a network routing system 54 2002
7,278,055 System and method for virtual router failover in a network routing system 24 2006
7,668,087 Hierarchical metering in a virtual router-based network switch 4 2007
7,522,604 Routing traffic through a virtual router-based network switch 6 2007
7,761,743 Fault tolerant routing in a non-hot-standby configuration of a network routing system 10 2009
8,412,982 Fault tolerant routing in a non-hot-standby configuration of a network routing system 0 2011
 
JUNIPER NETWORKS, INC. (8)
6,885,635 High capacity router having redundant components 13 2000
7,813,264 High capacity router having redundant components 3 2005
7,940,694 Intelligent filtering of redundant data streams within computer networks 2 2005
7,801,150 Multiple media access control (MAC) addresses 0 2006
8,209,405 Failover scheme with service-based segregation 0 2006
8,086,907 Systems and methods for network information collection 0 2008
8,381,044 Systems and methods for network information collection 0 2011
8,438,261 Failover scheme with service-based segregation 0 2012
 
ENTERASYS NETWORKS, INC. (7)
6,072,772 Method for providing bandwidth and delay guarantees in a crossbar switch with speedup 109 1998
6,469,987 Virtual local area network with trunk stations 9 1998
6,301,224 Network switch with panic mode 5 1998
6,112,251 Virtual local network for sending multicast transmissions to trunk stations 31 1998
6,563,837 Method and apparatus for providing work-conserving properties in a non-blocking switch with limited speedup independent of switch size 58 1998
6,865,154 Method and apparatus for providing bandwidth and delay guarantees in combined input-output buffered crossbar switches that implement work-conserving arbitration algorithms 7 1999
6,418,480 Communication packet including a multicast address and a destination address different than an equivalent to the multicast address 5 2000
 
BROCADE COMMUNICATIONS SYSTEMS, INC. (6)
7,873,984 Network security through configuration servers in the fabric environment 0 2002
7,243,367 Method and apparatus for starting up a network or fabric 1 2002
7,209,435 System and method for providing network route redundancy across Layer 2 devices 29 2002
7,558,195 System and method for providing network route redundancy across layer 2 devices 7 2007
8,279,775 Node device cooperating with switch which implements zones in a fibre channel system 0 2007
8,014,301 System and method for providing network route redundancy across layer 2 devices 1 2009
 
EXTREME NETWORKS, INC. (6)
6,618,388 Method and system for VMAN protocol 18 2001
6,954,436 Method and apparatus for selecting redundant routers using tracking 49 2001
7,581,024 Method and system for increasing participation in a standby router protocol 1 2001
7,415,016 Method and system for VMAN protocol Layer-2 packet nested encapsulation 1 2003
7,894,451 Method of providing virtual router functionality 0 2005
7,822,033 MAC address detection device for virtual routers 0 2005
 
NEC CORPORATION (6)
5,815,668 Slave inter-lan connection device, an inter-lan connection system and a hot standby method of said inter-lan connection system 47 1996
7,327,671 Method and system for controlling communication network and router used in the network 1 2002
7,197,246 Optical switch, optical amplifier and optical power controller as well as optical add-drop multiplexer 2 2002
8,004,965 Redundant packet switching system and system switching method of redundant packet switching system 1 2005
7,764,601 Switching between layer 2 switches as destination of IP packets from cards 0 2005
7,843,920 Method and system for controlling communication network and router used in the network 1 2007
 
HITACHI, LTD. (5)
6,032,266 Network system having function of changing route upon failure 50 1997
6,496,510 Scalable cluster-type router device and configuring method thereof 39 1998
7,567,505 VRRP technology keeping VR confidentiality 2 2004
8,233,383 Network relay system and control method thereof 0 2008
7,738,507 Network relay system and control method thereof 0 2008
 
KABUSHIKI KAISHA TOSHIBA (5)
5,809,222 Method and apparatus for controlling continuous data server using more than one central control devices 12 1996
5,835,710 Network interconnection apparatus, network node apparatus, and packet transfer method for high speed, large capacity inter-network communication 175 1997
6,343,322 IP over ATM system using control messages to set up cut-through paths or bypass pipes in routers 41 1998
6,598,080 Network interconnection apparatus network node apparatus and packet transfer method for high speed large capacity inter-network communication 33 1999
7,055,061 Normal and standby modes for duplicated field apparatus control system 3 2001
 
ALCATEL (4)
6,189,042 LAN internet connection having effective mechanism to classify LAN traffic and resolve address resolution protocol requests 24 1998
7,184,394 Routing system providing continuity of service for the interfaces associated with neighboring networks 3 2002
7,177,269 Router providing continuity of service of the state machines associated with the neighboring routers 1 2002
7,308,503 Forwarding of IP packets for routing protocols 7 2002
 
EGENERA, INC. (4)
7,231,430 Reconfigurable, virtual processing system, cluster, network and method 27 2002
7,174,390 Address resolution protocol system and method in a virtual network 22 2002
6,971,044 Service clusters and method in a processing system with failover capability 41 2002
7,305,581 Service clusters and method in a processing system with failover capability 2 2005
 
HITACHI ULSA SYSTEMS CO., LTD. (4)
6,148,411 Network system having function of changing route upon failure 32 1999
6,505,311 Network system having function of changing route upon failure 13 2000
6,647,509 Network system having function of changing route upon failure 4 2002
7,243,258 Network system having function of changing route upon failure 2 2003
 
FATPIPE NETWORKS INDIA LIMITED (3)
6,295,276 Combining routers to increase concurrency and redundancy in external network access 71 1999
6,493,341 Combining routers to increase concurrency and redundancy in external network access 47 2000
7,406,048 Tools and techniques for directing packets over disparate networks 8 2004
 
FUJITSU LIMITED (3)
6,633,538 Node representation system, node monitor system, the methods and storage medium 68 1999
7,363,359 Element management system with automatic remote backup of network elements' local storage 7 2000
7,580,348 Communication apparatus, control method, and computer readable information recording medium 0 2004
 
INTEL CORPORATION (3)
6,934,292 Method and system for emulating a single router in a switch stack 36 1999
7,272,644 Internet based network topology discovery 1 2000
7,092,354 Method and apparatus to provide redundancy in a network 13 2001
 
AIRBUS OPERATIONS SAS (2)
6,937,957 Device and process for acquisition of measurements using a digital communication bus, particularly used during aircraft tests 1 2003
7,072,803 Device and process for acquisition of measurements using a digital communication bus, particularly used during aircraft tests 3 2004
 
ALCATEL CANADA INC. (2)
5,982,745 LAN bridging redundancy 24 1997
6,876,625 Method and apparatus for topology database re-synchronization in communications networks having topology state routing protocols 27 2000
 
ALCATEL LUCENT (2)
7,660,236 System and method of multi-nodal APS control protocol signaling 1 2006
7,680,030 Router providing continuity of service of the state machines associated with the neighboring routers 0 2007
 
AOL INC. (2)
7,752,329 Migrating configuration information based on user identity information 1 2002
8,275,900 Migrating configuration information based on user identity information 0 2010
 
AVAYA HOLDINGS LIMITED (2)
5,845,091 Forwarding of internetwork packets to a destination network via a selected one of a plurality of paths 78 1996
6,654,371 Method and apparatus for forwarding multicast data by relaying IGMP group membership 23 1999
 
ERICSSON INC. (2)
6,738,371 Ingress data queue management in a packet data router 74 1999
6,687,220 Quality of service management in a packet data router having multiple virtual router instances 12 1999
 
F5 NETWORKS, INC. (2)
8,108,554 Method and system for automatically mapping secure network address translations 2 2008
8,341,296 Method and system for automatically mapping secure network address translations 0 2011
 
FACEBOOK, INC. (2)
7,653,379 Configuring wireless devices 2 2007
7,986,938 Configuring wireless devices 0 2009
 
HUAWEI TECHNOLOGIES CO., LTD. (2)
7,835,270 Method for managing virtual router redundancy protocol backup groups 0 2006
8,155,131 Method, system and router for communication between IP devices 0 2009
 
NOKIA CORPORATION (2)
7,158,492 Load balancing in telecommunications system supporting mobile IP 8 2001
7,768,946 Resource determination in IP-based networks 1 2003
 
NOKIA, INC. (2)
6,910,148 Router and routing protocol redundancy 81 2000
7,392,424 Router and routing protocol redundancy 12 2005
 
PANASONIC CORPORATION (2)
7,764,696 Routing control method, router, and terminal 1 2004
7,499,396 Router selecting method and router apparatus 0 2004
 
PHX COMMUNICATIONS, INC. (2)
6,359,882 Method and apparatus for transmitting data 35 1997
6,282,172 Generating acknowledgement signals in a data communication system 49 1997
 
RAYTHEON BBN TECHNOLOGIES CORP. (2)
7,028,099 Network communication between hosts 4 2000
6,996,084 Publishing node information 16 2000
 
ROCKSTAR BIDCO, LP (2)
7,577,958 Expediting an operation in a computer system 0 1999
7,533,174 Media gateway connection information recovery 2 2000
 
RPX CORPORATION (2)
5,915,095 Method and apparatus for balancing processing requests among a plurality of servers based on measurable characteristics off network node and common application 93 1995
5,974,562 Network management system extension 21 1995
 
SIEMENS AKTIENGESELLSCHAFT (2)
8,089,980 Method for protection switching of geographically separate switching systems 0 2004
8,345,539 Addressing of redundant subscribers in a communication network 0 2005
 
SUN MICROSYSTEMS, INC. (2)
5,922,049 Method for using DHCP and marking to override learned IP addesseses in a network 121 1996
RE41293 Multiprocessor computer having configurable hardware system domains 0 2001
 
U S WEST TECHNOLOGIES, INC. (2)
5,903,731 System and associated method for re-engineering a telecommunications network support system with object-oriented translators 10 1995
6,085,255 System and associated method for re-engineering a telecommunications support system with object-oriented translators 42 1998
 
VERIZON BUSINESS GLOBAL LLC (2)
7,457,235 High resiliency network infrastructure 2 2003
7,961,634 High resiliency network intrastructure 1 2008
 
ACME PACKET, INC. (1)
7,778,268 Method and system of providing redundancy in a network device 1 2006
 
AIRSYS ATM S.A. (1)
7,707,281 Redundant input/output management device, notably for data routing 1 2001
 
ALAXALA NETWORKS CORPORATION (1)
7,792,016 Network relay device for relaying data in a network and control method for the same 1 2006
 
ALCATEL USA SOURCING, L.P. (1)
6,324,161 Multiple network configuration with local and remote network redundancy by dual media redirect 52 1998
 
ALCATEL-LUCENT USA INC. (1)
7,716,366 Enhancement of VRRP interface and router selection where an non-owner router is configured to respond to control and management messages addressed to an address associated with the virtual redundant router 2 2004
 
AMAZON.COM, INC. (1)
6,490,246 System and method for using active and standby routers wherein both routers have the same ID even before a failure occurs 23 2000
 
ARBOR NETWORKS, INC. (1)
7,970,886 Detecting and preventing undesirable network traffic from being sourced out of a network domain 1 2000
 
AT MOTION, INC. (1)
6,397,345 Fault tolerant bus for clustered system 31 1998
 
AT&T INTELLECTUAL PROPERTY I, L.P. (1)
8,064,336 Method and apparatus for reliable communications in a packet network 0 2010
 
AVAYA INC. (1)
6,035,405 Secure virtual LANs 108 1997
 
BOARD OF REGENTS OF THE UNIVERSITY OF NEBRASKA (1)
7,254,834 Fault tolerant firewall sandwiches 3 2002
 
CALLAHAN CELLULAR L.L.C. (1)
7,672,321 Data communication in networks comprising a plurality of network nodes and at least one star node 0 2007
 
CARNELIAN CORDLESS LLC (1)
5,802,263 Method of message transmission according to the producer /consumer principle between users in a distributed system with token passing and with time monitoring for fault detection 14 1995
 
CISCO SYSTEMS, INC. (1)
5,867,666 Virtual interfaces with dynamic binding 76 1997
 
COMPUTER ASSOCIATES THINK, INC. (1)
6,199,172 Method and apparatus for testing the responsiveness of a network device 22 1996
 
CONEXANT SYSTEMS, INC. (1)
7,120,683 Single switch image for a stack of switches 10 2001
 
CORRIGENT SYSTEMS LTD. (1)
7,283,465 Hierarchical virtual private LAN service protection scheme 23 2003
 
ELAN SCHALTELEMENTE GMBH & CO. KG (1)
6,466,539 Bus system 11 1997
 
ERICSSON AB (1)
6,590,868 Method and apparatus for restart communication between network elements 12 2001
 
FOUNDRY NETWORKS, LLC (1)
7,292,535 Highly-available OSPF routing protocol 26 2002
 
GENERAL INSTRUMENT CORPORATION (1)
6,906,526 Non-intrusive cable connection monitoring for use in HFC networks 7 2003
 
HASHIMOTO, NORIAKI (1)
6,894,978 Method and system for operation of a resilient closed communication network without a dedicated protection network segment 20 2000
 
HYBRID PATENTS INCORPORATED (1)
5,818,845 Hybrid access system having channel allocation and prioritized polling schemes 210 1996
 
ITT MANUFACTURING ENTERPRISES, INC. (1)
6,252,878 Switched architecture access server 79 1997
 
IXIA (1)
7,467,078 Portable distributed application framework 2 2004
 
KDDI CORPORATION (1)
7,349,372 Packet control apparatus to connect interconnected network and wireless apparatus 0 2003
 
LG-ERICSSON CO., LTD. (1)
7,047,341 Multi-processing memory duplication system 30 2002
 
LODGENET INTERACTIVE CORPORATION (1)
6,240,533 Method and apparatus for providing uninterrupted communication over a network link 28 1999
 
LSI LOGIC CORPORATION (1)
6,529,963 Methods and apparatus for interconnecting independent fibre channel fabrics 45 1998
 
LUCENT TECHNOLOGIES INC. (1)
5,835,696 Data router backup feature 127 1995
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
7,433,317 Network connection apparatus and network connection switching method 5 2004
 
MEGISTO SYSTEMS (1)
7,586,838 Flexible M:N redundancy mechanism for packet inspection engine 1 2004
 
MERCURY CORPORATION (1)
6,034,943 Adaptive communication node for use in an inter-processor communications system 2 1997
 
MOTOROLA SOLUTIONS, INC. (1)
6,771,593 Method for improving packet delivery in an unreliable environment 9 2001
 
NET2PHONE, INC. (1)
7,023,794 Method and architecture for redundant SS7 deployment in a voice over IP environment 6 2002
 
NOVELL, INC. (1)
6,601,184 System crash network access 4 2000
 
PATENTMARKS PORTFOLIO, LLC (1)
7,307,956 Multi-protocol telecommunications routing optimization 10 2002
 
PLACEWARE, INC. (1)
5,951,694 Method of redirecting a client service session to a second application server without interrupting the session by forwarding service-specific information to the second server 398 1997
 
RAPIDSTR EAM, INC. (1)
6,625,150 Policy engine architecture 49 1999
 
REDBOX TECHNOLOGIES LIMITED (1)
6,216,173 Method and apparatus for content processing and routing 143 1998
 
RESONATE INC. (1)
6,182,139 Client-side resource-based load-balancing with delayed-resource-binding using TCP state migration to WWW server farm 180 1998
 
SCIENTIFIC-ATLANTA, LLC (1)
RE44211 Constant bit rate transport in a contention based medium access control 0 2004
 
SHAREWAVE, INC. (1)
6,775,235 Tools and techniques for directing packets over disparate networks 29 2003
 
SIEMENS ENTERPRISE COMMUNICATIONS, INC. (1)
6,693,874 System and method for enabling fault tolerant H.323 systems 10 1999
 
SILICON GRAPHICS INTERNATIONAL, CORP. (1)
5,721,819 Programmable, distributed network routing 96 1995
 
SOLACE SYSTEMS, INC. (1)
7,859,992 Router redundancy in data communication networks 1 2006
 
SPRINT COMMUNICATIONS COMPANY L.P. (1)
8,010,644 Method and system for deploying a network monitoring service within a communication network 0 2005
 
STEELEYE TECHNOLOGY, INC. (1)
6,430,610 TCP/IP address protection mechanism in a clustered server environment 20 1998
 
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) (1)
6,597,699 Quality of service management in a packet data router system having multiple virtual router instances 26 1999
 
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY (1)
5,553,280 Method for providing critical time reactive management of database transactions for systems process 9 1994
 
TRI-COUNTY EXCELSIOR FOUNDATION (1)
7,302,704 Excising compromised routers from an ad-hoc network 6 2000
 
U.S. PHILIPS CORPORATION (1)
5,649,091 Local area network redundant pieces of interconnection equipment a false physical address and a logical address in common to form a unique entity 12 1995
 
UNWIRED PLANET, INC. (1)
6,412,079 Server pool for clustered system 48 1998
 
UTSTARCOM, INC. (1)
7,080,151 Method and system for mobile IP home agent redundancy by using home agent control nodes for managing multiple home agents 51 2002
 
VERIZON CORPORATE SERVICES GROUP INC. (1)
8,144,595 Variable translucency no-sight routing for AD-HOC networks 1 2005
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
8,443,239 High resiliency network infrastructure 0 2011