Patents by Inventor CunZhi Lu
CunZhi Lu 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: 9838309Abstract: In general, techniques for facilitating a distributed network (L3) subnet by which multiple independent control planes of network devices connected to physically separate L2 networks provide L2 reachability to/from a single L3 subnet. In some examples, a shared L2 network physically situated to connect a plurality of physically separate L2 networks “stitches” the L2 networks together within the respective, independent control planes of switches such that the control planes bridge L2 traffic for a single bridge domain for the separate L2 networks to the shared L2 network and visa-versa. Each of the independent control planes may be configured with a virtual IRB instance associated with the bridge domain and with a common network subnet. Each of the virtual IRBs provides a functionally similar routing interface for the single bridge domain for the separate L2 networks and allows the shared network subnet to be distributed among the independent control planes.Type: GrantFiled: June 8, 2015Date of Patent: December 5, 2017Assignee: Juniper Networks, Inc.Inventors: Kaushik Ghosh, Ramasamy Ramanathan, Anil Lohiya, Manoj Sharma, Shrinivasa Kini, Cunzhi Lu
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Patent number: 9100198Abstract: A provider edge bridge in a service provider network receives multiple media access control (MAC) Registration Protocol (MMRP) registration messages from customer networks via tunnels. The provider edge bridge snoops the MMRP registration messages to obtain multicast MAC addresses from the registration messages, and tunnels the MMRP registration messages toward one or more other bridges. The provider edge bridge constructs multicast forwarding tables based on the multicast addresses obtained from snooping the MMRP registrations, and uses the multicast forwarding tables for forwarding data units from the provider edge bridge towards destinations.Type: GrantFiled: March 29, 2013Date of Patent: August 4, 2015Assignee: Juniper Networks, Inc.Inventors: Sri Sairam Goli, CunZhi Lu, Ramanarayanan Ramakrishnan, Ramasamy Ramanathan
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Patent number: 9055000Abstract: In general, techniques for facilitating a distributed network (L3) subnet by which multiple independent control planes of network devices connected to physically separate L2 networks provide L2 reachability to/from a single L3 subnet. In some examples, a shared L2 network physically situated to connect a plurality of physically separate L2 networks “stitches” the L2 networks together within the respective, independent control planes of switches such that the control planes bridge L2 traffic for a single bridge domain for the separate L2 networks to the shared L2 network and visa-versa. Each of the independent control planes may be configured with a virtual IRB instance associated with the bridge domain and with a common network subnet. Each of the virtual IRBs provides a functionally similar routing interface for the single bridge domain for the separate L2 networks and allows the shared network subnet to be distributed among the independent control planes.Type: GrantFiled: December 17, 2012Date of Patent: June 9, 2015Assignee: Juniper Networks, Inc.Inventors: Kaushik Ghosh, Ramasamy Ramanathan, Anil Lohiya, Manoj Sharma, Shrinivasa Kini, Cunzhi Lu
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Publication number: 20130215892Abstract: A provider edge bridge in a service provider network receives multiple media access control (MAC) Registration Protocol (MMRP) registration messages from customer networks via tunnels. The provider edge bridge snoops the MMRP registration messages to obtain multicast MAC addresses from the registration messages, and tunnels the MMRP registration messages toward one or more other bridges. The provider edge bridge constructs multicast forwarding tables based on the multicast addresses obtained from snooping the MMRP registrations, and uses the multicast forwarding tables for forwarding data units from the provider edge bridge towards destinations.Type: ApplicationFiled: March 29, 2013Publication date: August 22, 2013Applicant: JUNIPER NETWORKS, INC.Inventors: Sri Sairam GOLI, CunZhi Lu, Ramanarayanan Ramakrishnan, Ramasamy Ramanathan
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Patent number: 8428062Abstract: A provider edge bridge in a service provider network receives multiple media access control (MAC) Registration Protocol (MMRP) registration messages from customer networks via tunnels. The provider edge bridge snoops the MMRP registration messages to obtain multicast MAC addresses from the registration messages, and tunnels the MMRP registration messages toward one or more other bridges. The provider edge bridge constructs multicast forwarding tables based on the multicast addresses obtained from snooping the MMRP registrations, and uses the multicast forwarding tables for forwarding data units from the provider edge bridge towards destinations.Type: GrantFiled: February 16, 2010Date of Patent: April 23, 2013Assignee: Juniper Networks, Inc.Inventors: Sri Sairam Goli, CunZhi Lu, Ramanarayanan Ramakrishnan, Ramasamy Ramanathan
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Patent number: 8195989Abstract: A device may detect and report failure in point-to-point Ethernet links. In one implementation, the device may determine, based on a periodic timing signal, whether at least one packet was received on an incoming Ethernet link during a previous period of the periodic timing signal. The device may update an entry in a circular buffer to indicate whether the at least one packet was received during the previous period of the periodic timing signal and analyze the circular buffer to determine whether there is a signal failure on the incoming Ethernet link.Type: GrantFiled: August 20, 2010Date of Patent: June 5, 2012Assignee: Juniper Networks, Inc.Inventors: CunZhi Lu, Ramanarayanan Ramakrishnan
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Publication number: 20110200042Abstract: A provider edge bridge in a service provider network receives multiple media access control (MAC) Registration Protocol (MMRP) registration messages from customer networks via tunnels. The provider edge bridge snoops the MMRP registration messages to obtain multicast MAC addresses from the registration messages, and tunnels the MMRP registration messages toward one or more other bridges. The provider edge bridge constructs multicast forwarding tables based on the multicast addresses obtained from snooping the MMRP registrations, and uses the multicast forwarding tables for forwarding data units from the provider edge bridge towards destinations.Type: ApplicationFiled: February 16, 2010Publication date: August 18, 2011Applicant: JUNIPER NETWORKS INC.Inventors: Sri Sairam GOLI, CunZhi LU, Ramanarayanan RAMAKRISHNAN, Ramasamy RAMANATHAN