公开(公告)号：US11411857B2

公开(公告)日：2022-08-09

申请号：US16854328

申请日：2020-04-21

Applicant: Cisco Technology, Inc.

Inventor： Changhong Shen ,  Lianxiang Wang ,  Yicheng Liu ,  Xiaorong Wang ,  Pan Wu

IPC: H04L12/28 ,  H04L45/16 ,  H04L12/18 ,  H04L45/64 ,  H04L45/02

Abstract: Systems and methods provide for enabling multicast-based performance routing and policy controls for software-defined networking in a wide area network deployment including a multicast application-route policy based on sources, groups, receivers, dynamic application-route policy path selection from multicast replicators, and application-route SLA switchover across paths and multicast replicators based on SD-WAN multicast routing architecture; and dynamically selecting SD-WAN multicast replicators based on policies for replication including allowed multicast groups, geographic location, bandwidth indications, system load, and performance, and switching over dynamically across multicast replicators based real-time multicast replicator status updates.

公开(公告)号：US20240414024A1

公开(公告)日：2024-12-12

申请号：US18808800

申请日：2024-08-19

Applicant: Cisco Technology, Inc.

Inventor： Changhong Shen ,  Ruozhong Xuan ,  Sampath Kumar Sthothra Bhasham ,  Vincent Li

IPC: H04L12/46 ,  H04L45/74 ,  H04L61/251 ,  H04L61/5014 ,  H04L67/141

Abstract: In one embodiment, a method includes acquiring an Internet Protocol version 6 (IPv6) address for a physical interface of a first network element. The method also includes configuring an Internet Protocol version 4 (IPv4) over IPv6 tunnel between the first network element and a second network element using the physical interface of the first network element. The method also includes acquiring an updated IPv6 address for the physical interface of the first network element and using an IPv6 Service Level Agreement (SLA) Hypertext Transfer Protocol (HTTP) operation to notify the second network element of the updated IPv6 address to establish a bidirectional IPv4 over IPv6 tunnel. The method further includes establishing a control connection with an IPv4 SD-WAN controller and automatically building an SD-WAN overlay tunnel with the bidirectional IPv4 over IPv6 tunnel as a transport.

公开(公告)号：US20240250909A1

公开(公告)日：2024-07-25

申请号：US18626851

申请日：2024-04-04

Applicant: Cisco Technology, Inc.

Inventor： Hongbo Xia ,  Xiaorong Wang ,  Yu Zhang ,  Changhong Shen

IPC: H04L47/22 ,  H04L47/24 ,  H04L47/34

CPC classification number: H04L47/22 ,  H04L47/24 ,  H04L47/34

Abstract: In one embodiment, a method includes determining, by a first network component, a sender shaper drop value based on the following: a maximum sequence number; a minimum sequence number; and a sender sequence counter number associated with the first network component. The method also includes determining, by the first network component, a wide area network (WAN) link drop value based on the sender sequence counter number associated with the first network component and a receiver sequence counter number associated with a second network component. The method further includes determining, by the first network component, whether to adjust a sender shaper rate based on the sender shaper drop value and the WAN link drop value.

公开(公告)号：US20240137335A1

公开(公告)日：2024-04-25

申请号：US18396214

申请日：2023-12-26

Applicant: Cisco Technology, Inc.

Inventor： Changhong Shen ,  Sampath Kumar ,  Ruozhong Xuan ,  Yin Wang ,  Madhu Gindi ,  Garima Pal ,  Vincent Li

IPC: H04L61/2514 ,  H04L9/40 ,  H04L45/748

CPC classification number: H04L61/2514 ,  H04L45/748 ,  H04L63/0272 ,  H04L2101/35

Abstract: In one embodiment, a method includes determining, by a router, a common prefix pool from a transport interface associated with a transport virtual private network (VPN). The method also includes identifying, by the router, a prefix associated with a service VPN and generating, by the router, an IPv6-to-IPv6 Network Address Translation (NAT66) prefix translation using the common prefix pool and the prefix. The NAT66 prefix translation includes a predetermined prefix length. The method further includes automatically installing, by the router, the NAT66 prefix translation into a translation table.

公开(公告)号：US11956153B2

公开(公告)日：2024-04-09

申请号：US17734566

申请日：2022-05-02

Applicant: Cisco Technology, Inc.

Inventor： Hongbo Xia ,  Xiaorong Wang ,  Yu Zhang ,  Changhong Shen

IPC: H04L47/22 ,  H04L47/24 ,  H04L47/34

CPC classification number: H04L47/22 ,  H04L47/24 ,  H04L47/34

Abstract: In one embodiment, a method includes determining, by a first network component, a sender shaper drop value based on the following: a maximum sequence number; a minimum sequence number; and a sender sequence counter number associated with the first network component. The method also includes determining, by the first network component, a wide area network (WAN) link drop value based on the sender sequence counter number associated with the first network component and a receiver sequence counter number associated with a second network component. The method further includes determining, by the first network component, whether to adjust a sender shaper rate based on the sender shaper drop value and the WAN link drop value.

公开(公告)号：US11863515B2

公开(公告)日：2024-01-02

申请号：US17689051

申请日：2022-03-08

Applicant: Cisco Technology, Inc.

Inventor： Changhong Shen ,  Sampath Kumar ,  Ruozhong Xuan ,  Yin Wang ,  Madhu Gindi ,  Garima Pal ,  Vincent Li

IPC: H04L45/748 ,  H04L9/40 ,  H04L61/2514 ,  H04L101/35 ,  H04L101/659

CPC classification number: H04L61/2514 ,  H04L45/748 ,  H04L63/0272 ,  H04L2101/35 ,  H04L2101/659

Abstract: In one embodiment, a method includes determining, by a router, a common prefix pool from a transport interface associated with a transport virtual private network (VPN). The method also includes identifying, by the router, a prefix associated with a service VPN and generating, by the router, an IPv6-to-IPv6 Network Address Translation (NAT66) prefix translation using the common prefix pool and the prefix. The NAT66 prefix translation includes a predetermined prefix length. The method further includes automatically installing, by the router, the NAT66 prefix translation into a translation table.

公开(公告)号：US11863427B2

公开(公告)日：2024-01-02

申请号：US17808376

申请日：2022-06-23

Applicant: Cisco Technology, Inc.

Inventor： Changhong Shen ,  Lianxiang Wang ,  Yicheng Liu ,  Xiaorong Wang ,  Pan Wu

IPC: H04L12/28 ,  H04L45/16 ,  H04L12/18 ,  H04L45/64 ,  H04L45/02

CPC classification number: H04L45/16 ,  H04L12/185 ,  H04L45/02 ,  H04L45/64

Abstract: Systems and methods provide for enabling multicast-based performance routing and policy controls for software-defined networking in a wide area network deployment including a multicast application-route policy based on sources, groups, receivers, dynamic application-route policy path selection from multicast replicators, and application-route SLA switchover across paths and multicast replicators based on SD-WAN multicast routing architecture; and dynamically selecting SD-WAN multicast replicators based on policies for replication including allowed multicast groups, geographic location, bandwidth indications, system load, and performance, and switching over dynamically across multicast replicators based real-time multicast replicator status updates.

公开(公告)号：US20230188469A1

公开(公告)日：2023-06-15

申请号：US17688994

申请日：2022-03-08

Applicant: Cisco Technology, Inc.

Inventor： Changhong Shen ,  Chingsung Lin ,  Yubei Cao ,  Sandy X. Chang

IPC: H04L47/22 ,  H04L47/34 ,  H04L47/27 ,  H04L9/40

CPC classification number: H04L47/225 ,  H04L47/27 ,  H04L47/34 ,  H04L63/0227

Abstract: In one embodiment, a method includes receiving, by a network node, a packet associated with a session. The method also includes performing, by the network node, a sequence-based anti-replay check and determining, by the network node, that the sequence-based anti-replay check rejected the packet. The method further includes performing, by the network node, a time-based anti-replay check, performing, by the network node, a selective anti-replay check, and determining, by the network node, whether to dynamically adjust a time-based anti-replay window size.

公开(公告)号：US20220393965A1

公开(公告)日：2022-12-08

申请号：US17808376

申请日：2022-06-23

Applicant: Cisco Technology, Inc.

Inventor： Changhong Shen ,  Lianxiang Wang ,  Yicheng Liu ,  Xiaorong Wang ,  Pan Wu

IPC: H04L45/16 ,  H04L12/18 ,  H04L45/64 ,  H04L45/02

Abstract: Systems and methods provide for enabling multicast-based performance routing and policy controls for software-defined networking in a wide area network deployment including a multicast application-route policy based on sources, groups, receivers, dynamic application-route policy path selection from multicast replicators, and application-route SLA switchover across paths and multicast replicators based on SD-WAN multicast routing architecture; and dynamically selecting SD-WAN multicast replicators based on policies for replication including allowed multicast groups, geographic location, bandwidth indications, system load, and performance, and switching over dynamically across multicast replicators based real-time multicast replicator status updates.

公开(公告)号：US11071005B2

公开(公告)日：2021-07-20

申请号：US16666904

申请日：2019-10-29

Applicant: Cisco Technology, Inc.

Inventor： Changhong Shen ,  Yu Zhang ,  Xiaorong Wang ,  Pu Duan

IPC: H04W28/02 ,  H04L12/725 ,  H04L12/715 ,  H04L12/851 ,  H04W36/30 ,  H04L12/801 ,  H04L12/24

Abstract: According to some embodiments, a method performed by a software defined wide area network (SD-WAN) controller in a SD-WAN network comprising a plurality of aggregation edge routers and a plurality of branch edge routers comprises the following steps. The method comprises: receiving, from each of the plurality of branch edge routers, a transmit location (TLOC) publication comprising a quality of service (QoS) attribute of one or more TLOCs configured on the branch edge router; determining a QoS policy based on the received TLOC publications; transmitting the QoS policy to the plurality of aggregation edge routers; receiving, from a branch edge router of the plurality of branch edge routers, a first congestion indication indicating that bandwidth utilization on a wide area network (WAN) interface of the branch edge router exceeds a first threshold; determining an updated QoS policy based on the received TLOC publications and the first congestion indication to reduce congestion at the branch edge router; and transmitting the updated QoS policy to the plurality of aggregation edge routers.