公开(公告)号：US20140192808A1

公开(公告)日：2014-07-10

申请号：US13737641

申请日：2013-01-09

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Pascal Thubert ,  Michael Behringer ,  Aswini Kumar Sattaluri

IPC: H04L12/56

CPC classification number: H04L45/74 ,  H04L12/4633 ,  H04L45/64 ,  H04L45/68 ,  H04L63/164

Abstract: In one implementation, sub-interfaces are defined in Layer three (L3) tunnels, such as generic routing encapsulization (GRE) or Internet protocol security (IPsec) tunnels. Sub-interfaces inside a L3 tunnel may be preferred to using several L3 tunnels. The flow label of the tunnel header is used to define sub-interfaces of a tunnel interface. The flow label is populated with a routing instance identifier to index the sub-interfaces.

Abstract translation: 在一个实现中，子接口在三层（L3）隧道中定义，例如通用路由封装（GRE）或因特网协议安全（IPsec）隧道。 L3隧道内的子接口可能优于使用多个L3隧道。 隧道头的流标签用于定义隧道接口的子接口。 流标签用路由实例标识符填充以对子接口进行索引。

公开(公告)号：US20140068105A1

公开(公告)日：2014-03-06

申请号：US14071585

申请日：2013-11-04

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Jean-Philippe Vasseur ,  Vincent Jean Ribiere

IPC: H04L12/803

CPC classification number: H04L47/125 ,  H04L45/128 ,  H04L45/22 ,  H04L45/64 ,  H04W40/28

Abstract: In one embodiment, a reactive routing computer network may be partitioned into diverse logical topologies, and a source node may transmit route request (RREQ) messages toward a destination node on each logical topology. In response, the source node may receive route reply (RREP) messages indicating routes to the destination node in each logical topology. The source node may thus select a route for each logical topology to reach the destination node, accordingly. In another embodiment, if partitioned logical topologies do not produce two or more routes or as a standalone embodiment, the source node may transmit RREQ messages toward the destination node without any corresponding logical topology. The destination node receives RREQ messages, and two or more routes from the source node to the destination node may be determined (e.g., by the destination or source node) based on the received RREQ messages at the destination node and path selection criteria.

Abstract translation: 在一个实施例中，可以将反应性路由计算机网络划分为不同的逻辑拓扑，并且源节点可以向每个逻辑拓扑上的目的地节点发送路由请求（RREQ）消息。 作为响应，源节点可以在每个逻辑拓扑中接收指示到目的地节点的路由的路由回复（RREP）消息。 因此，源节点可以相应地为每个逻辑拓扑选择到达目的地节点的路由。 在另一个实施例中，如果分区逻辑拓扑不产生两个或更多个路由或者作为独立实施例，则源节点可以向目的地节点发送RREQ消息而没有任何对应的逻辑拓扑。 目的地节点接收RREQ消息，并且可以基于目的地节点处的接收到的RREQ消息和路径选择标准来确定（例如，目的地或源节点）从源节点到目的地节点的两条或更多路由。

公开(公告)号：US20250080464A1

公开(公告)日：2025-03-06

申请号：US18462209

申请日：2023-09-06

Applicant: Cisco Technology, Inc.

Inventor： Carlos Pignataro ,  Pascal Thubert ,  Eric A. Voit ,  Nagendra Kumar Nainar

IPC: H04L47/127 ,  H04L47/2425

Abstract: Described herein are devices, systems, methods, and processes for optimizing network traffic distribution across multiple paths in a manner that is energy-efficient and environmental sustainability-aware. This may be achieved by leveraging time-series analytics and capacity planning based on seasonalities. Data associated with the Layer 3 topology of the network can be collected. Bandwidth can be pre-reserved on an energy-aware traffic engineering tunnel. The time-series data can be used to build a capacity plan based on the seasonalities. Nodes may be clustered based on usage patterns and network utilization seasonality. The data can be used to make decisions about when and where to combine or shut down paths for energy efficiency, while maintaining optimal network performance. A hysteresis mechanism may be incorporated to avoid oscillation when changing active links. Power savings can be achieved by fully turning off or depowering certain network components when they are not needed.

公开(公告)号：US20250071086A1

公开(公告)日：2025-02-27

申请号：US18813893

申请日：2024-08-23

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Jerome Henry

IPC: H04L61/45 ,  H04L61/103

Abstract: Address Resolution Protocol (ARP)-proxy update for roaming client devices may be provided. A client device may query for a list of active Internet Protocol (IP) addresses used by the client device. Next, the client device may determine that an Access Point (AP) supports a collaborative IP exchange function. Then the client device may send, in response to determining that the AP supports the collaborative IP exchange function, the list of active Internet Protocol (IP) addresses to the AP.

公开(公告)号：US12231417B2

公开(公告)日：2025-02-18

申请号：US18120889

申请日：2023-03-13

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Patrick Wetterwald ,  Jonas Zaddach ,  Eric Levy-Abegnoli

IPC: H04L9/40 ,  H04L67/141 ,  H04L67/142

Abstract: Techniques for adjusting a duration of an authenticated user device session. A baseline session duration is determined for a session for which a user account is authorized in response to a request for authentication. A first session is established on behalf of a user device associated with the user account based at least in part on the user account performing a first authentication. A posture associated with the user device is determined. The baseline duration is then adjusted to a dynamic duration based at least in part upon the posture associated with the user device. Based at least in part on the dynamic duration the user can be required to re-authenticate.

公开(公告)号：US20250039048A1

公开(公告)日：2025-01-30

申请号：US18649814

申请日：2024-04-29

Applicant: Cisco Technology, Inc.

Inventor： Carlos Pignataro ,  Pascal Thubert ,  Eric A. Voit

IPC: H04L41/0833 ,  H04L43/08

Abstract: Described herein are devices, systems, methods, and processes for managing power congestion in multi-path routing systems. Indications may be similar to the ECN, and may be used in network headers, including headers for IPV6, SRv6, NSH, or other tunneling protocols. The indications, namely EOPN, PTE, and ECMP-exclude, can provide a mechanism for managing network power consumption and controlling ECMP routing based on flow priority and characteristics. The power budget can be dynamically adjusted based on the current power source mix, which may help to achieve sustainability goals. Hashing optimizations and signaling can be utilized to manage network power congestion and bandwidth-normalized power efficiency availability. A process may be implemented to ensure there is sufficient capacity to serve the expected traffic for different next-hop paths. Additionally, the ECN can be used to quickly react to congestion, bring capacity back online, and maintain optimal network performance, even in the absence of congestion.

公开(公告)号：US12213052B2

公开(公告)日：2025-01-28

申请号：US17750229

申请日：2022-05-20

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Eric Levy-Abegnoli ,  Jonas Zaddach ,  Patrick Wetterwald

IPC: H04W40/24

Abstract: In one embodiment, an illustrative method herein may comprise: receiving, at a first edge device, a direct indication from a second edge device that a mobile device has moved from the first to the second edge device; determining, based on the direct indication, a first time at which the mobile device attached to the second edge device; receiving a network routing update message indicative of a routing update for the mobile device having moved to the second edge device; determining, based on the network routing update message, a second time at which convergence completed at the first edge device; and calculating a convergence time for the mobile device to be detected as having moved to the second edge device based on a difference between the first time and the second time.

公开(公告)号：US12212427B2

公开(公告)日：2025-01-28

申请号：US18452917

申请日：2023-08-21

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Eric M. Levy-Abegnoli ,  Patrick M. P. Wetterwald ,  Ratko Kovacina

IPC: H04L12/18 ,  H04L9/40

Abstract: A method includes receiving, at a first edge node, an Internet Protocol (IP) multicast address of a first silent host node. The method further includes receiving, at a second edge node, an IP multicast address of a second silent host node. The IP multicast address of the first silent host node is equal to the IP multicast address of the second silent host node. The method further includes storing the IP multicast address of the first and second silent host node in a shared entry of a routing table. The method further includes receiving, at a third edge node, a packet from a third host node and determining that a destination address of the packet corresponds to the IP multicast address stored in the shared entry of the routing table. The method further includes sending the packet to both the first host node and the second host node.

公开(公告)号：US20250023811A1

公开(公告)日：2025-01-16

申请号：US18352858

申请日：2023-07-14

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Patrick Wetterwald ,  JP Vasseur ,  Eric Levy- Abegnoli

IPC: H04L45/02

Abstract: A process can include determining respective link state information corresponding to a plurality of links between two or more border routers and a plurality of child nodes of the two or more border routers, the border routers and the child nodes included in a Destination Oriented Directed Acyclic Graph (DODAG) of a Low-Power Lossy Network (LLN). Consensus information indicative of a current status of each border router of the two or more border routers can be determined based on the respective link state information. The consensus information can be used to update an election of one or more active border routers from the two or more border routers to utilize as a virtual DODAG root for the LLN. Traffic directed to the virtual DODAG root can be routed to an active border router of the two or more border routers based on the updated election.

公开(公告)号：US20240414102A1

公开(公告)日：2024-12-12

申请号：US18331681

申请日：2023-06-08

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Carlos Pignataro ,  Ayan Banerjee

IPC: H04L47/70 ,  H04L47/125

Abstract: Devices, systems, methods, and processes for sustainably operating a plurality of network planes via de-energization and re-energization is described herein. In many network configurations, a plurality of planes exist that allow for more modular connections in a network fabric. Often, these planes are configured such that each plane is not directly connected to another plane. Because of this, various embodiments described herein can evaluate network conditions and determine if there are conditions suitable to de-energize a plane by either directing the plane to enter a lower-power mode, by shutting off the plane, or disconnecting the available power. This de-energization period can be for a period of time or can occur until a triggering event is detected that indicates that the plane should be re-energized. These determinations can be done based on current traffic trends or historical conditions. They may also be heuristic-based or generated via one or more machine-learning processes.