公开(公告)号：US20240064547A1

公开(公告)日：2024-02-22

申请号：US17820125

申请日：2022-08-16

Applicant: Cisco Technology Inc.

Inventor： Jakub Horn ,  Peter Psenak

IPC: H04W24/10 ,  H04W28/02

CPC classification number: H04W24/10 ,  H04W28/0236 ,  H04W28/0247

Abstract: A system of one embodiment provides reverse affinity link exclusion for a computer network. The system includes a memory and a processor. The memory is operable to store logical transmission links, logical receiving links, and metrics for data packets of nodes. The system determines a threshold value for node link reliability. The system determines the node link reliability of a receiving node link by evaluating data loss associated with one or more incoming data packets. The system compares the node link reliability to the threshold value. The system identifies the receiving node link when the node link reliability exceeds the threshold value. The system communicates the identified receiving node link to one or more nodes.

公开(公告)号：US20240064092A1

公开(公告)日：2024-02-22

申请号：US18501775

申请日：2023-11-03

Applicant: Cisco Technology, Inc.

Inventor： Alfred Clarence Lindem, III ,  Lester C. Ginsberg ,  Peter Psenak

IPC: H04L45/122 ,  H04L45/00 ,  H04L45/02

CPC classification number: H04L45/122 ,  H04L45/02 ,  H04L45/20

Abstract: Techniques are described for providing a method and apparatus for determining source address validation of a data packet in a network in the presence of asymmetric routing. When a data packet is received by a node such as a router, a reverse path forwarding lookup is performed to determine if the data packet was received on a next-hop interface and if the reverse path forwarding fails, a Shortest Path First (SPF) computation at the router advertising the source route will be performed using the link state database to determine whether the data packet arrived from a valid path of the network.

公开(公告)号：US20240031275A1

公开(公告)日：2024-01-25

申请号：US18091824

申请日：2022-12-30

Applicant: Cisco Technology, Inc.

Inventor： Alfred Clarence Lindem III ,  Peter Psenak ,  Lester C. Ginsberg

IPC: H04L45/122 ,  H04L45/00 ,  H04L45/02

CPC classification number: H04L45/122 ,  H04L45/20 ,  H04L45/02

Abstract: Techniques are described for providing a method and apparatus for determining source address validation of a data packet in a network in the presence of asymmetric routing. When a data packet is received by a node such as a router, a reverse path forwarding lookup is performed to determine if the data packet was received on a next-hop interface and if the reverse path forwarding fails, a Shortest Path First (SPF) computation at the router advertising the source route will be performed using the link state database to determine whether the data packet arrived from a valid path of the network.

公开(公告)号：US20230300067A1

公开(公告)日：2023-09-21

申请号：US18200197

申请日：2023-05-22

Applicant: Cisco Technology, Inc.

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

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

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

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.

公开(公告)号：US11671346B2

公开(公告)日：2023-06-06

申请号：US17969890

申请日：2022-10-20

Applicant: Cisco Technology, Inc.

Inventor： Peter Psenak ,  Robert Hanzl ,  Clarence Filsfils ,  Ketan Jivan Talaulikar

IPC: H04L45/12 ,  H04L45/02

CPC classification number: H04L45/12 ,  H04L45/02

Abstract: Various systems and methods for using strict path forwarding. For example, one method involves receiving an advertisement at a node. The advertisement includes a segment identifier (SID). In response to receiving the advertisement, the node determines whether the SID is a strict SID or not. If the SID is a strict SID, the node generates information, such as forwarding information that indicates how to forward packets along a strict shortest path corresponding to the strict SID.

公开(公告)号：US20210377163A1

公开(公告)日：2021-12-02

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 ,  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.

公开(公告)号：US20190312806A1

公开(公告)日：2019-10-10

申请号：US16384219

申请日：2019-04-15

Applicant: Cisco Technology, Inc.

Inventor： Peter Psenak ,  Robert Hanzl ,  Clarence Filsfils ,  Ketan Jivan Talaulikar

IPC: H04L12/721 ,  H04L12/751

Abstract: Various systems and methods for using strict path forwarding. For example, one method involves receiving an advertisement at a node. The advertisement includes a segment identifier (SID). In response to receiving the advertisement, the node determines whether the SID is a strict SID or not. If the SID is a strict SID, the node generates information, such as forwarding information that indicates how to forward packets along a strict shortest path corresponding to the strict SID.

公开(公告)号：US20180159700A1

公开(公告)日：2018-06-07

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 ,  H04L12/751 ,  H04L12/721

CPC classification number: H04L12/4633 ,  H04L45/02 ,  H04L45/127

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.

公开(公告)号：US09979629B2

公开(公告)日：2018-05-22

申请号：US14832888

申请日：2015-08-21

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Muthurajah Sivabalan ,  Sami Boutros ,  Peter Psenak ,  Rex Emmanuel Fernando ,  Clarence Filsfils

IPC: H04L12/46 ,  H04L12/751 ,  H04L12/755 ,  H04L12/707 ,  H04L12/715

CPC classification number: H04L45/021 ,  H04L12/4662 ,  H04L45/22 ,  H04L45/64

Abstract: A method and system are disclosed for distributing (advertising) segment identifiers in network functions virtualization and/or software defined networking environments. An exemplary method includes receiving a route advertisement that includes a prefix with a forwarding address for a first network element and receiving a segment identifier (SID) advertisement that includes a prefix SID for the prefix. The route advertisement may be received from a second network element proxying control plane functions for the first network element. Reachability information for the first network element is updated based on the route advertisement and the SID advertisement.

公开(公告)号：US20140269725A1

公开(公告)日：2014-09-18

申请号：US14211065

申请日：2014-03-14

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  Stefano B. Previdi ,  Peter Psenak

IPC: H04L12/741

CPC classification number: H04L41/12 ,  H04L12/4633 ,  H04L45/04 ,  H04L45/12 ,  H04L45/46 ,  H04L45/50 ,  H04L45/507 ,  H04L45/54 ,  H04L45/74 ,  H04L45/745 ,  H04L47/724 ,  H04L49/608

Abstract: An apparatus and method for resolving services to nodal segments. The method involves receiving an advertisement. The advertisement includes a service address associated with a service. The method further involves identifying an originator node for the service, where the originator node is associated with a nodal segment identifier. The method further involves updating the advertisement. Updating the advertisement involves adding information identifying the originator node to the advertisement.

Abstract translation: 一种用于解析服务节点的设备和方法。 该方法涉及接收广告。 广告包括与服务相关联的服务地址。 该方法还涉及识别用于服务的发起者节点，其中发起者节点与节点段标识符相关联。 该方法还包括更新广告。 更新广告涉及将标识发起者节点的信息添加到广告中。