公开(公告)号：WO2020061462A1

公开(公告)日：2020-03-26

申请号：PCT/US2019/052168

申请日：2019-09-20

Applicant: CISCO TECHNOLOGY, INC.

Inventor： FILSFILS, Clarence ,  ALI, Zafar ,  BROCKNERS, Frank

IPC: H04L12/721 ,  H04L12/26

Abstract: The present technology provides a system and method for implementing targeted collection of in-situ Operation, Administration and Maintenance data from select nodes in a Segment Routing Domain. The selection is programmable and is implemented by setting an iOAM bit in the function arguments field of a Segment Identifier. In this way only the nodes associated with local Segment Identifiers (Function field of a Segment Identifier) with an iOAM argument bit are directed to generate iOAM data. The iOAM data generated by target nodes may be stored in TLV field of the segment routing header. The Segment Routing packet is then decapsulated at a Segment Routing egress node and the Header information with the collected iOAM data is sent to a controller entity for further processing, analysis and/or monitoring.

公开(公告)号：WO2020018623A1

公开(公告)日：2020-01-23

申请号：PCT/US2019/042131

申请日：2019-07-17

Applicant: CISCO TECHNOLOGY, INC.

Inventor： TOLLET, Jerome ,  FIOCCO, Alain ,  SURCOUF, Andre Jean-Marie ,  GARVIA, Pablo Camarillo ,  FILSFILS, Clarence

IPC: H04L12/721 ,  H04L12/715

Abstract: Systems, methods, and computer-readable media for providing multi-cloud connectivity. A method can involve adding a new virtual private cloud (VPC) to a multi-cloud environment including a private network and VPCs connected to the private network via a segment routing (SR) domain and respective virtual routers on the VPCs and the private network. The method can involve deploying a new virtual router on the new VPC, registering the new virtual router at a BGP controller in the multi-cloud environment, and receiving, at the BGP controller, topology information from the new virtual router. The method can further involve identifying routes in the multi-cloud environment based on paths computed based on the topology information, sending, to the new virtual router, routing information including the routes, SR identifiers and SR policies, and based on the routing information, providing interconnectivity between the private network, the VPCs, and the new VPC.

公开(公告)号：WO2019005935A1

公开(公告)日：2019-01-03

申请号：PCT/US2018/039714

申请日：2018-06-27

Applicant: CISCO TECHNOLOGY, INC.

Inventor： BRISSETTE, Patrice ,  FILSFILS, Clarence ,  DUKES, Darren ,  DAWRA, Gaurav ,  CLAD, Francois ,  CAMARILLO GARVIA, Pablo

IPC: H04L12/721 ,  H04L12/723 ,  H04L12/751 ,  H04L12/715 ,  H04L12/707

Abstract: In one embodiment, Ethernet Virtual Private Network (EVPN) is implemented using Internet Protocol Version 6 (IPv6) Segment Routing (SRv6) underlay network and SRv6 enhanced Border Gateway Protocol (BGP) signaling. A particular route associated with a particular Internet Protocol Version 6 (IPv6) Segment Routing (SRv6) Segment Identifier (SID) is advertised in a particular route advertisement message of a routing protocol (e.g., BGP). The SID includes a locator of a particular router and a function encoding representing a particular EVPN end function of the particular router, with the particular SID including a routable prefix to the particular router. The particular router receives a particular packet including the particular SID; and in response, the particular router performs the particular EVPN end function on the particular packet. In one embodiment, the particular packet includes a Segment Routing Header (SRH) including the particular SID as the currently active SID.

公开(公告)号：WO2014186717A1

公开(公告)日：2014-11-20

申请号：PCT/US2014/038415

申请日：2014-05-16

Applicant: CISCO TECHNOLOGY, INC.

Inventor： FILSFILS, Clarence ,  PREVIDI, Stevano, B. ,  ULRICH, Steven, W. ,  BASHANDY, Ahmed, R.

IPC: H04L12/723 ,  H04L12/715

CPC classification number: H04L45/507 ,  H04L45/04 ,  H04L45/50

Abstract: An apparatus and method for enabling interoperability of segment routing (SR) enabled nodes and LDP enabled nodes in a network domain. In one embodiment, the method may include mapping a first node identifier (ID) to a first segment ID in memory, wherein the first node ID uniquely identifies a first node within a network domain, and wherein the first node is not SR enabled. A message is generated and subsequently transmitted directly or indirectly to another node within the network domain, wherein the message comprises the first node ID mapped to the first segment ID, and wherein the other node is SR enabled.

Abstract translation: 一种用于实现网络域中的段路由（SR）使能节点和启用LDP的节点的互操作性的装置和方法。 在一个实施例中，该方法可以包括将第一节点标识符（ID）映射到存储器中的第一段ID，其中第一节点ID唯一地标识网络域内的第一节点，并且其中第一节点不是SR启用的。 生成消息并且随后直接地或间接地传送到网络域内的另一个节点，其中该消息包括映射到第一段ID的第一节点ID，并且其中另一节点被启用SR。

公开(公告)号：WO2013155023A1

公开(公告)日：2013-10-17

申请号：PCT/US2013/035689

申请日：2013-04-09

Applicant: CISCO TECHNOLOGY, INC.

Inventor： FILSFILS, Clarence ,  WARD, David ,  METZ, Christopher, Y. ,  DE VRIENDT, Peter

IPC: H04L12/26 ,  H04L12/24 ,  H04L12/721

CPC classification number: H04L43/00 ,  H04L41/00 ,  H04L41/0681 ,  H04L43/04 ,  H04L43/08 ,  H04L43/0805 ,  H04L45/70

Abstract: In one embodiment, a method includes receiving at a network device, route convergence measurements and traffic demand measurements from a plurality of routers, and computing network availability based on the measurements at the network device. The route convergence measurements are associated with route computations at the routers and the traffic demand measurements include portions of a demand matrix associated with the routers. An apparatus and logic are also disclosed herein.

Abstract translation: 在一个实施例中，一种方法包括在网络设备处接收来自多个路由器的路由收敛测量和业务需求测量，以及基于网络设备处的测量来计算网络可用性。 路由收敛测量与路由器上的路由计算相关联，并且业务需求测量包括与路由器相关联的需求矩阵的部分。 本文还公开了一种装置和逻辑。

公开(公告)号：WO2009009404A3

公开(公告)日：2009-01-15

申请号：PCT/US2008/069120

申请日：2008-07-03

Applicant: CISCO TECHNOLOGY, INC. ,  FILSFILS, Clarence ,  BETTINK, John H. W. ,  BRYANT, Stewart Frederick ,  ORAN, David R.

Inventor： FILSFILS, Clarence ,  BETTINK, John H. W. ,  BRYANT, Stewart Frederick ,  ORAN, David R.

IPC: H04L29/06 ,  H04L12/26 ,  H04L12/24

Abstract: In one embodiment, a router receives a real-time multimedia flow that comprises IP packets. The router then processes values included in the Identifier fields of the IP packets using resources similar to those used in the monitoring of RTP flows to identify metrics for the real-time multimedia flow. The metrics may be transferred to a remote management device for aggregation with metrics output by other routers located on the data path for the real-time multimedia flow.

公开(公告)号：WO2007064541A3

公开(公告)日：2007-06-07

申请号：PCT/US2006/045143

申请日：2006-11-20

Applicant: CISCO TECHNOLOGY, INC. ,  RANGARAJAN, Vijay ,  FILSFILS, Clarence ,  BETTINK, John

Inventor： RANGARAJAN, Vijay ,  FILSFILS, Clarence ,  BETTINK, John

IPC: H04J1/16

Abstract: A method, performed in a network packet routing element, comprising establishing a forwarding information base (FIB) lacking a hierarchical data structure but wherein one or more dependent FIB entries are associated with a parent FIB entry; establishing a plurality of strict priority queues, wherein each of the queues has an associated priority; receiving a change to the parent FIB entry; for each of the dependent FIB entries, selecting one of the queues and enqueuing the dependent FIB entries in the selected queues for re-resolution; dequeuing the dependent FIB entries for re-resolution, according to a priority order of the queues.

公开(公告)号：WO2005053234A1

公开(公告)日：2005-06-09

申请号：PCT/US2004/037420

申请日：2004-11-09

Applicant: CISCO TECHNOLOGY, INC. ,  VASSEUR, Jean Philippe ,  PREVIDI, Stefano, B. ,  FILSFILS, Clarence ,  WARD, David

Inventor： VASSEUR, Jean Philippe ,  PREVIDI, Stefano, B. ,  FILSFILS, Clarence ,  WARD, David

IPC: H04L12/28

CPC classification number: H04L45/12 ,  H04B1/71635 ,  H04L45/02 ,  H04L45/18 ,  H04L45/22 ,  H04L45/28 ,  H04L45/46 ,  H04L45/48 ,  H04L45/50 ,  H04W88/06 ,  H04W88/10

Abstract: A method and apparatus are disclosed for performing a shortest path first network routing path determination in a data communications network based in part on information about links that are associated as shared risk groups. Micro-loops are avoided in computing shortest path first trees by considering whether links are within shared risk link group.

Abstract translation: 公开了一种用于在数据通信网络中执行最短路径第一网络路由路径确定的方法和装置，部分地基于关于作为共享风险组关联的链路的信息。 通过考虑链路是否在共享风险链路组内，避免计算最短路径树中的微循环。

公开(公告)号：WO2023009314A1

公开(公告)日：2023-02-02

申请号：PCT/US2022/036924

申请日：2022-07-13

Applicant: CISCO TECHNOLOGY, INC.

Inventor： GANDHI, Rakesh ,  FILSFILS, Clarence

IPC: H04L43/026 ,  H04L45/24

Abstract: Techniques are described for utilizing entropy labels of a Multiprotocol Label Switching (MPLS) label stack for performing monitoring operations (e.g., telemetry, performance measurement, OAM, etc.) without altering the MPLS label stack and/or packet path (e.g., ECMP path). The techniques may include determining, by a node of a network, to perform a monitoring operation associated with traffic that is to be sent along a path through the network. In some examples, the node may receive a packet that is to be sent along the path and encapsulate the packet with an MPLS header. The MPLS header may include an entropy label, entropy label indicator, or other label that is capable of carrying a flag indicating the monitoring operation to be performed. The flag may be carried in a TTL field or traffic class field of the label such that the MPLS label stack is not altered to trigger the monitoring operation.

公开(公告)号：WO2022035640A1

公开(公告)日：2022-02-17

申请号：PCT/US2021/044282

申请日：2021-08-03

Applicant: CISCO TECHNOLOGY, INC.

Inventor： FILSFILS, Clarence ,  CLAD, Francois ,  CAMARILLO GARVIA, Pablo ,  SIVABALAN, Siva ,  RAZA, Syed, Kamran

IPC: H04L29/06 ,  H04L12/741

Abstract: In one embodiment, a method includes identifying, by a network component, a first segment identifier (SID) within a SID list. The first SID includes a first SID block and a first micro SID (uSID). The method also includes initializing, by the network component, a packing list of a uSID carrier with the first uSID of the first SID and initializing, by the network component, a packing block of the uSID carrier with the first SID block of the first SID. The method further includes initializing, by the network component, a remaining packing capacity of the packing list with a carrier capacity of the first SID and initializing, by the network component, an empty compressed SID list.