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    MPLS extension headers in mixed networks
    1.
    发明授权
    MPLS extension headers in mixed networks 有权

    公开(公告)号：US11888734B2

    公开(公告)日：2024-01-30

    申请号：US17170318

    申请日：2021-02-08

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： James N. Guichard ,  Haoyu Song ,  Loa Andersson

    IPC: H04L45/50 ,  H04L45/745 ,  H04L69/22

    CPC classification number: H04L45/507 ,  H04L45/745 ,  H04L69/22

    Abstract: A mixed Multiprotocol Label Switching (MPLS) network includes both extension header capable (EH capable) nodes and EH non-capable nodes. A first EH capable node receives advertised capabilities of a downstream node. These advertised capabilities indicate whether the downstream node is EH capable. The first EH capable node receives a packet to be transmitted to the downstream node via the MPLS network, and determines whether the packet includes an extension header (EH). The node inserts an EH label into an MPLS label stack of the packet after determining the advertised capabilities of the downstream node indicate that the downstream node is EH capable, and after determining the packet does not include the EH.

    MPLS extension headers for in-network services
    4.
    发明授权
    MPLS extension headers for in-network services 有权

    公开(公告)号：US11582148B2

    公开(公告)日：2023-02-14

    申请号：US17147208

    申请日：2021-01-12

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Haoyu Song ,  Zhenbin Li ,  Tianran Zhou ,  James N. Guichard ,  Stewart Frederick Bryant ,  Andrew G. Malis

    IPC: H04L12/723 ,  H04L45/50 ,  H04L45/16 ,  H04L69/22

    Abstract: Described herein are methods and devices (e.g., routers) that add in-network services to a multiprotocol label switching (MPLS) network. A method can include a router of the MPLS network receiving a packet and modifying the packet by adding one or more MPLS extension headers, adding a header of the extension header(s), and adding an indication within an MPLS label stack that one or more MPLS extension headers have been added to the packet. The method can also include the router forwarding the packet as modified to another router of the MPLS network. In certain embodiments, an extension header label (EHL) within a label value field of a label stack entry indicates that one or more MPLS extension headers have been added to the packet. In other embodiments, a forward equivalent class (FEC) indicates that one or more MPLS extension headers follow the MPLS label stack.

    Segment routing in MPLS network
    5.
    发明授权
    Segment routing in MPLS network 有权

    公开(公告)号：US11201820B2

    公开(公告)日：2021-12-14

    申请号：US16940323

    申请日：2020-07-27

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Haoyu Song ,  Zhenbin Li ,  Tianran Zhou ,  James N. Guichard ,  Stewart Frederick Bryant ,  Andrew G. Malis

    IPC: H04L12/723 ,  H04L29/06

    Abstract: Described herein are methods and devices (e.g., routers) for performing segment routing over a multiprotocol label switching (MPLS) network. A method can include a router of the MPLS network receiving a packet, and the router modifying the packet by adding a segment routing header (SRH) type MPLS extension header. The SRH type MPLS extension header includes one or more segment identifiers (SIDs) that collectively provide a SID list for use in segment routing. The method further comprises the router copying one of the one or more SIDs in the SRH type MPLS extension header to a top of an MPLS label stack, and the router forwarding the packet as modified to another router of the MPLS network based on the one of the one or more SIDs included in a label stack entry at the top of the MPLS label stack.

    Domain Name System Services for Variable-Length Address Networks
    7.
    发明申请
    Domain Name System Services for Variable-Length Address Networks 有权

    公开(公告)号：US20230083671A1

    公开(公告)日：2023-03-16

    申请号：US17991247

    申请日：2022-11-21

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Yingzhen Qu ,  Haoyu Song ,  Michael McBride ,  James N. Guichard

    IPC: H04L61/4511

    Abstract: A DNS server comprises: a receiver configured to receive a registration request comprising a domain name, a local address, and a scope, the registration request requests registration of the domain name; a processor coupled to the receiver and configured to execute computer instructions that cause the processor to: assign an address to the domain name based on the local address and the scope, and generate a registration response comprising the address; and a transmitter coupled to the processor and configured to transmit the registration response towards an endpoint. The processor may be further configured to cache a correspondence among the domain name, the address, and the scope.

    MPLS EXTENSION HEADERS IN MIXED NETWORKS
    8.
    发明申请
    MPLS EXTENSION HEADERS IN MIXED NETWORKS 有权

    公开(公告)号：US20210203599A1

    公开(公告)日：2021-07-01

    申请号：US17170318

    申请日：2021-02-08

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： James N. Guichard ,  Haoyu Song ,  Loa Andersson

    IPC: H04L12/723 ,  H04L29/06 ,  H04L12/741

    Abstract: A mixed Multiprotocol Label Switching (MPLS) network includes both extension header capable (EH capable) nodes and EH non-capable nodes. A first EH capable node receives advertised capabilities of a downstream node. These advertised capabilities indicate whether the downstream node is EH capable. The first EH capable node receives a packet to be transmitted to the downstream node via the MPLS network, and determines whether the packet includes an extension header (EH). The node inserts an EH label into an MPLS label stack of the packet after determining the advertised capabilities of the downstream node indicate that the downstream node is EH capable, and after determining the packet does not include the EH.

    MPLS EXTENSION HEADERS FOR IN-NETWORK SERVICES
    9.
    发明申请
    MPLS EXTENSION HEADERS FOR IN-NETWORK SERVICES 有权

    公开(公告)号：US20210135986A1

    公开(公告)日：2021-05-06

    申请号：US17147208

    申请日：2021-01-12

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Haoyu Song ,  Zhenbin Li ,  Tianran Zhou ,  James N. Guichard ,  Stewart Frederick Bryant ,  Andrew G. Malis

    IPC: H04L12/723 ,  H04L12/761 ,  H04L29/06

    Abstract: Described herein are methods and devices (e.g., routers) that add in-network services to a multiprotocol label switching (MPLS) network. A method can include a router of the MPLS network receiving a packet and modifying the packet by adding one or more MPLS extension headers, adding a header of the extension header(s), and adding an indication within an MPLS label stack that one or more MPLS extension headers have been added to the packet. The method can also include the router forwarding the packet as modified to another router of the MPLS network. In certain embodiments, an extension header label (EHL) within a label value field of a label stack entry indicates that one or more MPLS extension headers have been added to the packet. In other embodiments, a forward equivalent class (FEC) indicates that one or more MPLS extension headers follow the MPLS label stack.

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