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    In-band direct mode performance loss measurement in software defined networks
    11.
    发明授权
    In-band direct mode performance loss measurement in software defined networks 有权

    公开(公告)号：US11184235B2

    公开(公告)日：2021-11-23

    申请号：US16191676

    申请日：2018-11-15

    Applicant: Cisco Technology, Inc.

    Inventor： Clarence Filsfils ,  Rakesh Gandhi ,  Zafar Ali

    IPC: H04L12/24 ,  H04L12/26 ,  H04L12/851 ,  H04L12/715 ,  H04L12/707 ,  H04L29/06

    Abstract: Mechanisms are provided for “direct mode” (in-band) performance loss measurement in computer networks where packet loss is measured directly in the data plane using techniques based on ECMP paths. Counters on each of an ingress node and an egress node are configured by a network controller to count traffic for indicators associated with different equal-cost multi-path (ECMP) paths through a network between ingress and egress nodes. Each indicator is toggled on or off during a measurement interval during which traffic is measured by the traffic counters on the ingress and egress nodes for each ECMP path. The traffic counters (measured in bytes/packets) from the ingress and egress nodes are sent via event driven telemetry to the network controller for performance loss measurement determination.

    Communicating packets across multi-domain networks using compact forwarding instructions
    12.
    发明授权
    Communicating packets across multi-domain networks using compact forwarding instructions 有权

    公开(公告)号：US11140074B2

    公开(公告)日：2021-10-05

    申请号：US16580944

    申请日：2019-09-24

    Applicant: Cisco Technology, Inc.

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

    IPC: H04L12/721 ,  H04L29/06 ,  H04L12/715

    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.

    Packet network interworking including segment routing
    13.
    发明授权
    Packet network interworking including segment routing 有权

    公开(公告)号：US11134002B2

    公开(公告)日：2021-09-28

    申请号：US16659484

    申请日：2019-10-21

    Applicant: Cisco Technology, Inc.

    Inventor： Clarence Filsfils ,  Swadesh Agrawal ,  Zafar Ali ,  Pablo Camarillo Garvia ,  Francois Clad

    IPC: H04L12/715 ,  H04L12/749

    Abstract: In one embodiment, a network comprises a first forwarding domain using a first data plane forwarding protocol and a second forwarding domain using a second data plane forwarding protocol different than the first data forwarding plane forwarding protocol. The first forwarding domain includes a first path node and a particular border node. The second forwarding domain includes a second path node and the particular border node. The particular border node performs Segment Routing or other protocol interworking between the different data plane forwarding domains, such as for transporting packets through a different forwarding domain or translating a packet to use a different data forwarding protocol. These forwarding domains typically include Segment Routing (SR) and SR-Multiprotocol Label Switching (SR-MPLS). Paths through the network are determined by a Path Computation Engine and/or based on route advertisements such associated with Binding Segment Identifiers (BSIDs) (e.g., labels, Internet Protocol version 6 addresses).

    NETWORK INTERWORKING WITH NO CROSS-DOMAIN STATE
    15.
    发明申请
    NETWORK INTERWORKING WITH NO CROSS-DOMAIN STATE 有权

    公开(公告)号：US20210021513A1

    公开(公告)日：2021-01-21

    申请号：US16513379

    申请日：2019-07-16

    Applicant: Cisco Technology, Inc.

    Inventor： Clarence Filsfils ,  Pablo Camarillo Garvia ,  Francois Clad ,  Swadesh Agrawal ,  Zafar Ali

    IPC: H04L12/723 ,  H04L12/715 ,  H04L12/46 ,  H04L12/749

    Abstract: Network interworking with no cross-domain state may be provided. First, an edge node may receive a packet from an intermediate node in a first domain. The edge node may be between the first domain and a second domain. Next, the edge node may pop, in response to a first Service Identifier (SID) in the packet, headers corresponding to the first domain from the packet. The edge node may then push, in response to the first SID, a label stack corresponding to the second domain onto the packet. The first SID may include data corresponding to the label stack. Then the edge node may route the packet to the second domain destine to an end node in the second domain.

    Fast protection switchover in a transport network
    17.
    发明授权
    Fast protection switchover in a transport network 有权
    快速保护在传输网络中切换

    公开(公告)号：US09450774B2

    公开(公告)日：2016-09-20

    申请号：US14270437

    申请日：2014-05-06

    Applicant: Cisco Technology, Inc.

    Inventor： Zafar Ali ,  Antonello Bonfanti

    IPC: H04L12/24 ,  H04L12/723 ,  H04L12/64

    CPC classification number: H04L12/24 ,  H04L12/64 ,  H04L12/6418 ,  H04L41/0668 ,  H04L45/50

    Abstract: Presented herein are techniques that enable fast switchover or reversion between label switched paths. In accordance with examples presented herein, a working label switched path is added to a fast switchover protection group that is configured to carry traffic from an ingress network device to an egress network device through a transport network. A restoration label switched path associated with the working label switched path is also added to the fast switchover protection group. The fast switchover protection group is stored at the ingress network device. After storing the fast switchover protection group at the ingress network device, at least the working label switched path is used to carry traffic through the transport network.

    Abstract translation: 这里提出的是能够在标签交换路径之间快速切换或回复的技术。 根据本文所示的示例，工作标签交换路径被添加到快速切换保护组，快速切换保护组被配置为通过传输网络将来自入口网络设备的业务传送到出口网络设备。 与工作标签交换路径相关的恢复标签交换路径也被添加到快速切换保护组。 快速切换保护组存储在入口网络设备。 在快速切换保护组存储入口网络设备后，至少使用工作标签交换路径通过传输网络传输流量。

    Forwarding table validation
    18.
    发明授权
    Forwarding table validation 有权

    公开(公告)号：US11909641B2

    公开(公告)日：2024-02-20

    申请号：US18148245

    申请日：2022-12-29

    Applicant: Cisco Technology, Inc.

    Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Zafar Ali ,  Syed Kamran Raza

    IPC: H04L45/74 ,  H04L45/745 ,  H04L43/12

    CPC classification number: H04L45/745 ,  H04L43/12

    Abstract: The present disclosure includes methods, systems, and non-transitory computer-readable media for validating data in a data structure used for forwarding packets by a network device comprising sending a data packet probe identifying a destination and including a segment ID, wherein the segment ID maps to a first interpretation by a receiving router to perform an action on the data packet probe to rewrite a portion of a destination address in a header of the data packet probe, and to redirect the data packet probe to the network device that initiated the data packet probe.

    Communicating packets across multi-domain networks using compact forwarding instructions
    20.
    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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