Patents by Inventor Danmu Wu

Danmu Wu 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).

  • VxLAN security implemented using VxLAN membership information at VTEPs
    Patent number: 10171559
    Abstract: A network device stores a Virtual Extensible Local Area Network (VxLAN) Tunnel Endpoint (VTEP) membership information that associates VxLANs each with a corresponding set of VTEPs authorized to originate VxLAN packets on that VxLAN. The network device receives from a communication network a VxLAN packet that identifies a VxLAN and an originating VTEP. The VTEP compares the originating VTEP to the set of VTEPs associated with the VxLAN in the VTEP membership information that matches the identified VxLAN. If the comparison indicates that the originating VTEP is not included in the set of VTEPs authorized to originate VxLAN packets, the VTEP discards the received VxLAN packet. Otherwise the VTEP further processes the VxLAN packet.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: January 1, 2019
    Assignee: Cisco Technology, Inc.
    Inventors: Feng Cai, Yuxiang Chen, Danmu Wu, Zhiyong Fang
  • Techniques for decreasing multiprotocol label switching entropy label overhead
    Patent number: 9912598
    Abstract: A method is provided in one embodiment and includes receiving at a network element an encapsulated packet and determining whether both an ECMP/LAG Existing (“ele”) flag and an Entropy Label Capability (“elc”) flag are set for an egress node of the packet in a Label Distribution Protocol (“LDP”) database of the network element. If both the ele and elc flags are set for the egress node of the packet in the LDP database, the method further includes determining whether the network element is an ingress node for the packet and, if the network element is the ingress node for the packet, pushing an Entropy Label (“EL”) and an Entropy Label Indicator (“ELI”) onto an MPLS stack of the packet.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: March 6, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Danmu Wu, Jianda Liu, Yunpeng Zhang, Feng Cai
  • TECHNIQUES FOR DECREASING MULTIPROTOCOL LABEL SWITCHING ENTROPY LABEL OVERHEAD
    Publication number: 20170366461
    Abstract: A method is provided in one embodiment and includes receiving at a network element an encapsulated packet and determining whether both an ECMP/LAG Existing (“ele”) flag and an Entropy Label Capability (“elc”) flag are set for an egress node of the packet in a Label Distribution Protocol (“LDP”) database of the network element. If both the ele and elc flags are set for the egress node of the packet in the LDP database, the method further includes determining whether the network element is an ingress node for the packet and, if the network element is the ingress node for the packet, pushing an Entropy Label (“EL”) and an Entropy Label Indicator (“ELI”) onto an MPLS stack of the packet.
    Type: Application
    Filed: June 16, 2016
    Publication date: December 21, 2017
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Danmu Wu, Jianda Liu, Yunpeng Zhang, Feng Cai
  • VxLAN Security Implemented using VxLAN Membership Information at VTEPs
    Publication number: 20160149808
    Abstract: A network device stores a Virtual Extensible Local Area Network (VxLAN) Tunnel Endpoint (VTEP) membership information that associates VxLANs each with a corresponding set of VTEPs authorized to originate VxLAN packets on that VxLAN. The network device receives from a communication network a VxLAN packet that identifies a VxLAN and an originating VTEP. The VTEP compares the originating VTEP to the set of VTEPs associated with the VxLAN in the VTEP membership information that matches the identified VxLAN. If the comparison indicates that the originating VTEP is not included in the set of VTEPs authorized to originate VxLAN packets, the VTEP discards the received VxLAN packet. Otherwise the VTEP further processes the VxLAN packet.
    Type: Application
    Filed: November 21, 2014
    Publication date: May 26, 2016
    Inventors: Feng Cai, Yuxiang Chen, Danmu Wu, Zhiyong Fang