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    Systems and Methods for Link State Flooding Transmitter-Based Flow Control
    1.
    发明申请
    Systems and Methods for Link State Flooding Transmitter-Based Flow Control 有权

    公开(公告)号：US20240372816A1

    公开(公告)日：2024-11-07

    申请号：US18774138

    申请日：2024-07-16

    Applicant: Cisco Technology, Inc.

    Inventor： Peter Psenak ,  Marek Karasek ,  Lester C. Ginsberg

    IPC: H04L47/25 ,  H04L47/26

    Abstract: In one embodiment, a method for link state flooding between a network node and a receiving node includes determining a current transmit rate that Link State Protocol Data Units (LSPs) are being transmitted from the network node to the receiving node. The method further includes determining an LSP acknowledgment rate that indicates a rate at which a plurality of LSP acknowledgments are received at the network node from the receiving node. The method further includes determining a new transmit rate based on the current transmit rate and the LSP acknowledgment rate. The method further includes transmitting a plurality of LSPs from the network node to the receiving node using the new transmit rate.

    FLOOD OPTIMIZATION TO DISTRIBUTE MULTIHOME SOURCE INFORMATION IN NETWORK
    2.
    发明公开
    FLOOD OPTIMIZATION TO DISTRIBUTE MULTIHOME SOURCE INFORMATION IN NETWORK 审中-公开

    公开(公告)号：US20240333547A1

    公开(公告)日：2024-10-03

    申请号：US18193282

    申请日：2023-03-30

    Applicant: Cisco Technology, Inc.

    Inventor： Mankamana Prasad Mishra ,  Vinish Ramachandran ,  Sridhar Santhanam ,  Peter Psenak

    IPC: H04L12/18 ,  H04L45/00 ,  H04L45/17

    CPC classification number: H04L12/185 ,  H04L45/17 ,  H04L45/32

    Abstract: A method comprises, at routers of a network configured to provide connectivity from a multicast receiver to edge routers multihomed to a multicast source of multicast traffic on an Ethernet segment: creating a limited flood domain for the Ethernet segment, wherein the limited flood domain includes boundary routers positioned to make a final decision as to which of the edge routers to send a multicast join for the multicast traffic; by the boundary routers, upon receiving a source announcement that announces the multicast source is active on a particular edge router of the Ethernet segment, locally storing information, provided by the source announcement, which includes a multicast address for the multicast source and identifies a link to the particular edge router; and by boundary router of the boundary routers, upon receiving the multicast join, sending the multicast join to the particular edge router using the multicast address and the link.

    Communicating packets across multi-domain networks using compact forwarding instructions
    3.
    发明授权
    Communicating packets across multi-domain networks using compact forwarding instructions 有权

    公开(公告)号：US11722404B2

    公开(公告)日：2023-08-08

    申请号：US17404817

    申请日：2021-08-17

    Applicant: Cisco Technology, Inc.

    Inventor： Clarence Filsfils ,  Francois Clad ,  Zafar Ali ,  Peter Psenak

    IPC: H04L12/721 ,  H04L45/00 ,  H04L69/22 ,  H04L45/02

    CPC classification number: H04L45/34 ,  H04L45/04 ,  H04L69/22

    Abstract: Techniques and mechanisms for compressing the size of SIDs to be smaller than a complete IPv6 address (or “micro SIDs”), and scaling micro SIDs across a multi-domain environment using micro SID-domain-blocks. Segment routing over IPv6 (SRv6) uses 128-bit IPv6 addresses as SIDs for segment routing. According to this disclosure, multiple SRv6 SIDs may be expressed in a compact format such that a 128-bit IPv6 address, such as the destination address field of the IPv6 header, may store multiple micro SIDs. Further, SID-domain-blocks may be assigned to each domain in a multi-domain network such that micro SIDs may be expressed in the context of a given domain, rather than being shared in the global multi-domain network. In this way, lists of domain-specific SIDs may be fully expressed in the IPv6 destination address of the packet to scale micro SID into large, multi-domain networks.

    SYSTEMS AND METHODS FOR DETERMINING SECURE NETWORK ELEMENTS USING FLEXIBLE ALGORITHM TECHNOLOGY
    4.
    发明申请
    SYSTEMS AND METHODS FOR DETERMINING SECURE NETWORK ELEMENTS USING FLEXIBLE ALGORITHM TECHNOLOGY 有权

    公开(公告)号：US20210377152A1

    公开(公告)日：2021-12-02

    申请号：US17399937

    申请日：2021-08-11

    Applicant: Cisco Technology, Inc.

    Inventor： Peter Psenak ,  Paul William Wells ,  Ketan Jivan Talaulikar ,  Clarence Filsfils

    IPC: H04L12/721 ,  H04L29/06

    Abstract: In one embodiment, an apparatus includes one or more processors and one or more computer-readable non-transitory storage media coupled to the one or more processors. The one or more computer-readable non-transitory storage media include instructions that, when executed by the one or more processors, cause the apparatus to perform operations including receiving a first type-length-value (TLV) associated with a winning flexible algorithm definition (FAD) from a first element of a network. The operations also include determining a security level for the winning FAD based on the TLV. The operations further include determining a data transmission route through a plurality of elements of the network based on the security level for the winning FAD.

    Applying Attestation Tokens to The Open Shortest Path First (OSPF) Routing Protocol
    5.
    发明申请
    Applying Attestation Tokens to The Open Shortest Path First (OSPF) Routing Protocol 审中-公开

    公开(公告)号：US20200322312A1

    公开(公告)日：2020-10-08

    申请号：US16674419

    申请日：2019-11-05

    Applicant: Cisco Technology, Inc.

    Inventor： Peter Psenak ,  Paul Wells ,  Ketan Jivan Talaulikar ,  Clarence Filsfils

    IPC: H04L29/06 ,  H04L12/721 ,  H04L12/741 ,  H04L12/751 ,  H04L12/813 ,  G06F21/72

    Abstract: In one embodiment, a method includes receiving an OSPF hello message including an attestation token from a second network apparatus, determining that the attestation token is valid for the second network apparatus at a current time, establishing an adjacency to the second network apparatus in response to the determination, computing, based at least on the attestation token, a trust level for a first link from the first network apparatus to the second network apparatus and a trust level for first prefixes associated with the first link, and sending an LSA comprising the trust level for the first link and the trust level for the first prefixes to neighboring network apparatuses, where the trust level for the first link and the trust level for the prefixes are used by the network apparatuses in the network to compute a routing table of the network.

    Capability aware routing
    7.
    发明授权
    Capability aware routing 有权

    公开(公告)号：US10171263B2

    公开(公告)日：2019-01-01

    申请号：US15826900

    申请日：2017-11-30

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： Alfred C. Lindem, III ,  Peter Psenak ,  Ijsbrand Wijnands

    IPC: H04L12/46 ,  H04L12/721 ,  H04L12/751

    Abstract: Various systems and methods for bypassing one or more non-capable nodes. For example, one method involves a capable node determining that an adjacent node is non-capable, where capable nodes are configured to implement a data plane capability and non-capable nodes are not. The method then involves identifying a downstream node that is capable. The downstream node is on a shortest path. The method also involves generating information that identifies a tunnel to the downstream node.

    Communicating packets across multi-domain networks using compact forwarding instructions
    8.
    发明授权
    Communicating packets across multi-domain networks using compact forwarding instructions 有权

    公开(公告)号：US11855884B2

    公开(公告)日：2023-12-26

    申请号：US18200197

    申请日：2023-05-22

    Applicant: Cisco Technology, Inc.

    Inventor： Clarence Filsfils ,  Francois Clad ,  Zafar Ali ,  Peter Psenak

    IPC: H04L12/721 ,  H04L45/00 ,  H04L69/22 ,  H04L45/02

    CPC classification number: H04L45/34 ,  H04L45/04 ,  H04L69/22

    Abstract: Techniques and mechanisms for compressing the size of SIDs to be smaller than a complete IPv6 address (or “micro SIDs”), and scaling micro SIDs across a multi-domain environment using micro SID-domain-blocks. Segment routing over IPv6 (SRv6) uses 128-bit IPv6 addresses as SIDs for segment routing. According to this disclosure, multiple SRv6 SIDs may be expressed in a compact format such that a 128-bit IPv6 address, such as the destination address field of the IPv6 header, may store multiple micro SIDs. Further, SID-domain-blocks may be assigned to each domain in a multi-domain network such that micro SIDs may be expressed in the context of a given domain, rather than being shared in the global multi-domain network. In this way, lists of domain-specific SIDs may be fully expressed in the IPv6 destination address of the packet to scale micro SID into large, multi-domain networks.

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