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    SCALABLE DISTRIBUTED END-TO-END PERFORMANCE DELAY MEASUREMENT FOR SEGMENT ROUTING POLICIES
    301.
    发明申请
    SCALABLE DISTRIBUTED END-TO-END PERFORMANCE DELAY MEASUREMENT FOR SEGMENT ROUTING POLICIES 审中-公开

    公开(公告)号：US20200076719A1

    公开(公告)日：2020-03-05

    申请号：US16280962

    申请日：2019-02-20

    Applicant: Cisco Technology, Inc.

    Inventor： Clarence Filsfils ,  Rakesh Gandhi ,  Tarek Saad ,  Sagar Soni ,  Patrick Khordoc

    IPC: H04L12/26 ,  H04L12/44

    Abstract: The present technology is directed to a scalable solution for end-to-end performance delay measurement for Segment Routing Policies on both SR-MPLS and SRv6 data planes. The scalability of the solution stems from the use of distributed PM sessions along SR Policy ECMP paths. This is achieved by dividing the SR policy into smaller sections comprised of SPT trees or sub-paths, each of which is associated with a Root-Node. Downstream SID List TLVs may be used in Probe query messages for signaling SPT information to the Root-Nodes Alternatively, this SPT signaling may be accomplished by using a centralized controller. Root-Nodes are responsible for dynamically creating PM sessions and measuring delay metrics for their associated SPT tree section. The root-nodes then send the delay metrics for their local section to an ingress PE node or to a centralized controller using delay metric TLV field of the response message.

    Segment routing packet policies and functions providing processing signaling and packet forwarding efficiencies in a network
    303.
    发明授权
    Segment routing packet policies and functions providing processing signaling and packet forwarding efficiencies in a network 有权

    公开(公告)号：US10516610B2

    公开(公告)日：2019-12-24

    申请号：US15922894

    申请日：2018-03-15

    Applicant: Cisco Technology, Inc.

    Inventor： Clarence Filsfils ,  Francois Clad ,  Pablo Camarillo Garvia

    IPC: H04L12/741 ,  H04L29/06

    Abstract: In one embodiment, segment routing network processing of packets is performed, including using segment routing packet policies and functions providing segment routing processing signaling and packet forwarding efficiencies in a network. A segment routing node signals to another segment routing node using a signaled segment identifier in a segment list of a segment routing packet with the segments left identifying a segment list element above the signaled segment identifier. A downstream segment routing node receives the segment routing packet, obtains this signaled segment identifier, and performs processing of one or more packets based thereon. In one embodiment, a provider edge node replaces its own segment identifier in a received customer packet, with a downstream customer node using the replaced (signaling) segment identifier (of a provider edge node/segment routing function) for accessing a return path through the provider network.

    MPLS segment routing
    309.
    发明授权
    MPLS segment routing 有权

    公开(公告)号：US10218610B2

    公开(公告)日：2019-02-26

    申请号：US15637744

    申请日：2017-06-29

    Applicant: Cisco Technology, Inc.

    Inventor： Daniel C. Frost ,  Stewart F. Bryant ,  Clarence Filsfils

    IPC: H04L12/723 ,  H04L12/721 ,  H04L12/751 ,  H04L12/717 ,  H04L29/06 ,  H04L12/24 ,  H04L12/775

    Abstract: A method, communications processing device, and computer readable medium for MPLS segment routing are disclosed. One embodiment of the method comprises generating a first link-state packet comprising a first data structure. The first data structure maps a first portcode to a link connecting the first router within the network or to an additional router reachable from the first router. The method embodiment further includes receiving an incoming data packet encapsulated with a header comprising an incoming portcode stack having the first portcode as its uppermost portcode. The method embodiment further includes removing the first portcode from the incoming portcode stack to create an outgoing portcode stack for an outgoing data packet, and forwarding the outgoing data packet via a port, of the first router, identified by the first portcode.

    Enhanced Segment Routing Processing of Packets
    310.
    发明申请
    Enhanced Segment Routing Processing of Packets 审中-公开

    公开(公告)号：US20180375766A1

    公开(公告)日：2018-12-27

    申请号：US16019286

    申请日：2018-06-26

    Applicant: Cisco Technology, Inc.

    Inventor： Clarence Filsfils ,  Francois Clad ,  Pablo Camarillo Garvia ,  David Delano Ward

    IPC: H04L12/741

    Abstract: In one embodiment, new Segment Routing capabilities are used in the steering of packets through Segment Routing nodes in a network. A Segment List includes a set of one or more Segment List (SL) Groups, each of which identifies one or more Segments contiguously or non-contiguously stored in the Segment List (or stored across multiple Segment Lists) of a Segment Routing packet. Each SL Group typically includes one Segment that is encoded as a Segment Identifier, and may include Segments that are Extended Values. The steering order of SL Groups is not required to be the same order as they are listed in the Segment List, as the value of Segments Left may be increased, remain the same, or decreased (possibly to skip a next SL Group) and possibly based on the result of an evaluation of a conditional expression.

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