公开(公告)号：US20220417137A1

公开(公告)日：2022-12-29

申请号：US17811570

申请日：2022-07-08

申请人： Cisco Technology, Inc.

发明人： Clarence Filsfils ,  Zafar Ali ,  Syed Kamran Raza ,  Ahmed Refaat Bashandy ,  Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Jaganbabu Rajamanickam ,  Rakesh Gandhi ,  Bhupendra Yadav ,  Faisal Iqbal

IPC分类号： H04L45/00 ,  H04L43/106 ,  H04L45/02 ,  H04L41/0246

摘要： In one embodiment, a service chain data packet is instrumented as it is communicated among network nodes in a network providing service-level and/or networking operations visibility. The service chain data packet includes a particular header identifying a service group defining one or more service functions, and is a data packet and not a probe packet. A network node adds networking and/or service-layer operations data to the particular service chain data packet, such as, but not limited to, in the particular header. Such networking operations data includes a performance metric or attribute related to the transport of the particular service chain packet in the network. Such service-layer operations data includes a performance metric or attribute related to the service-level processing of the particular service chain data packet in the network.

公开(公告)号：US10904152B2

公开(公告)日：2021-01-26

申请号：US16359180

申请日：2019-03-20

申请人： Cisco Technology, Inc.

发明人： Zafar Ali ,  Clarence Filsfils ,  Francois Clad ,  Faisal Iqbal ,  Mohmad Saleem Hafeez

IPC分类号： H04L12/841 ,  H04L12/741 ,  H04L12/723 ,  H04W40/24 ,  H04L12/931 ,  H04L12/947 ,  H04W88/18 ,  H04L1/00

摘要： In one illustrative example, a network node (e.g. a router or switch) may receive a data packet and timestamp a copy of the data packet. The node may also compute a signature for the copy and insert the signature in a header of the copy. The node may send the copy to a controller for correlation with one or more other timestamped data packet copies of the data packet from one or more other network nodes having the same signature and for the computation of delay. The original data packet may be forwarded to a next network node without any timestamp or other metadata added to it. The processing of the data packets may be performed as part of a function for punting the timestamped data packet copy and forwarding, or as a function for forwarding and punting the timestamped data packet copy.

公开(公告)号：US10764175B1

公开(公告)日：2020-09-01

申请号：US16358110

申请日：2019-03-19

申请人： Cisco Technology, Inc.

发明人： Clarence Filsfils ,  Zafar Ali ,  Faisal Iqbal

IPC分类号： H04L12/721 ,  H04L12/741 ,  H04L12/723 ,  H04L12/26 ,  H04L12/733

摘要： In one illustrative example, a router node is configured for use in a network having a plurality of interconnected router nodes for routing packets according to segment routing (SR). Router nodes of a first network slice are configured to establish routes based on first path determination criteria associated with a first identifier, and router nodes of a second network slice are configured to establish routes based on second path determination criteria associated with a second identifier. Each router node in the first network slice may operate as a unit under test (UUT) and validate isolation from network resources in the second network slice. An operator of the network may be alerted when an isolation failure is detected.

公开(公告)号：US10158556B2

公开(公告)日：2018-12-18

申请号：US15468890

申请日：2017-03-24

申请人： CISCO TECHNOLOGY, INC.

发明人： Faisal Iqbal ,  Sagar Soni ,  Nagendra Kumar Nainar ,  Carlos M. Pignataro

IPC分类号： H04L12/751 ,  H04L12/803 ,  H04L12/723

摘要： One embodiment is a method including creating at an ingress node of a communications network a request message including an Application Specific Mapping (“ASM”) TLV identifying a hashing parameter for a network application, wherein the ASM TLV includes range of values for the identified hashing parameter to enable load balancing for packets associated with the network application; forwarding the created request message to a node associated with a next hop along a first path through the network between the ingress node and an egress node; and receiving a response message from the node associated with the next hop, wherein the response message includes load balancing information for the node associated with the next hop corresponding to the range of values for the identified hashing parameter.

公开(公告)号：US20230135261A1

公开(公告)日：2023-05-04

申请号：US18147158

申请日：2022-12-28

申请人： Cisco Technology, Inc.

发明人： Clarence Filsfils ,  Zafar Ali ,  Syed Kamran Raza ,  Ahmed Bashandy ,  Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Jaganbabu Rajamanickam ,  Rakesh Gandhi ,  Bhupendra Yadav ,  Faisal Iqbal

IPC分类号： H04L45/00 ,  H04L43/106 ,  H04L45/02 ,  H04L41/0246

摘要： In one embodiment, a service chain data packet is instrumented as it is communicated among network nodes in a network providing service-level and/or networking operations visibility. The service chain data packet includes a particular header identifying a service group defining one or more service functions, and is a data packet and not a probe packet. A network node adds networking and/or service-layer operations data to the particular service chain data packet, such as, but not limited to, in the particular header. Such networking operations data includes a performance metric or attribute related to the transport of the particular service chain packet in the network. Such service-layer operations data includes a performance metric or attribute related to the service-level processing of the particular service chain data packet in the network.

公开(公告)号：US10523552B2

公开(公告)日：2019-12-31

申请号：US16156734

申请日：2018-10-10

申请人： Cisco Technology, Inc.

发明人： Faisal Iqbal ,  Sagar Soni ,  Nagendra Kumar Nainar ,  Carlos M. Pignataro

IPC分类号： H04L12/751 ,  H04L12/803 ,  H04L12/723 ,  H04L12/725

摘要： One embodiment is a method including creating at an ingress node of a communications network a request message identifying a hashing parameter for a network application, and including range of values for the identified hashing parameter to enable load balancing for packets associated with the network application; forwarding the created request message to a node associated with a next hop along a first path through the network between the ingress node and an egress node; and receiving a response message from the node associated with the next hop, wherein the response message includes load balancing information for the node associated with the next hop corresponding to the range of values for the identified hashing parameter.

公开(公告)号：US10469367B2

公开(公告)日：2019-11-05

申请号：US15841276

申请日：2017-12-13

申请人： Cisco Technology, Inc.

发明人： Clarence Filsfils ,  Zafar Ali ,  Syed Kamran Raza ,  Ahmed Refaat Bashandy ,  Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Jaganbabu Rajamanickam ,  Rakesh Gandhi ,  Bhupendra Yadav ,  Faisal Iqbal

IPC分类号： H04L12/721 ,  H04L12/26 ,  H04L12/751 ,  H04L12/733 ,  H04L29/12 ,  H04L12/725 ,  H04L12/749

摘要： In one embodiment, segment routing (SR) network processing of packets is performed which includes operations signaling and processing of packets in manners providing processing and/or memory efficiencies. One embodiment includes acquiring a segment routing particular packet by a particular router in a network. Responsive to the particular router data plane ascertained during fast path processing by a fast path processing unit that the segment routing particular packet is to be Operations, Administration, and Maintenance (OAM) processed by a different processing unit in the particular router, communicating a time stamp of a current time and the segment routing particular packet including a segment routing header that includes OAM signaling from said fast path processing to the different processing unit, with fast path processing being hardware-based packet processing by the fast path processing unit. The segment routing particular packet is OAM processing by the different processing unit.

公开(公告)号：US20190081882A1

公开(公告)日：2019-03-14

申请号：US16156734

申请日：2018-10-10

申请人： Cisco Technology, Inc.

发明人： Faisal Iqbal ,  Sagar Soni ,  Nagendra Kumar Nainar ,  Carlos M. Pignataro

IPC分类号： H04L12/751 ,  H04L12/723 ,  H04L12/803

CPC分类号： H04L45/02 ,  H04L45/306 ,  H04L45/50 ,  H04L47/125

摘要： One embodiment is a method including creating at an ingress node of a communications network a request message identifying a hashing parameter for a network application, and including range of values for the identified hashing parameter to enable load balancing for packets associated with the network application; forwarding the created request message to a node associated with a next hop along a first path through the network between the ingress node and an egress node; and receiving a response message from the node associated with the next hop, wherein the response message includes load balancing information for the node associated with the next hop corresponding to the range of values for the identified hashing parameter.

公开(公告)号：US11863435B2

公开(公告)日：2024-01-02

申请号：US17811570

申请日：2022-07-08

申请人： Cisco Technology, Inc.

发明人： Clarence Filsfils ,  Zafar Ali ,  Syed Kamran Raza ,  Ahmed Refaat Bashandy ,  Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Jaganbabu Rajamanickam ,  Rakesh Gandhi ,  Bhupendra Yadav ,  Faisal Iqbal

IPC分类号： H04L45/00 ,  H04L43/106 ,  H04L45/02 ,  H04L41/0246 ,  H04L45/302 ,  H04L45/741 ,  H04L101/659

CPC分类号： H04L45/34 ,  H04L41/0246 ,  H04L43/106 ,  H04L45/02 ,  H04L45/20 ,  H04L45/304 ,  H04L45/741 ,  H04L2101/659

摘要： In one embodiment, a service chain data packet is instrumented as it is communicated among network nodes in a network providing service-level and/or networking operations visibility. The service chain data packet includes a particular header identifying a service group defining one or more service functions, and is a data packet and not a probe packet. A network node adds networking and/or service-layer operations data to the particular service chain data packet, such as, but not limited to, in the particular header. Such networking operations data includes a performance metric or attribute related to the transport of the particular service chain packet in the network. Such service-layer operations data includes a performance metric or attribute related to the service-level processing of the particular service chain data packet in the network.

公开(公告)号：US20190158393A1

公开(公告)日：2019-05-23

申请号：US16259435

申请日：2019-01-28

申请人： CISCO TECHNOLOGY, INC.

发明人： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Faisal Iqbal

IPC分类号： H04L12/723 ,  H04L12/911 ,  H04L12/733 ,  H04L12/721

摘要： In one embodiment, a method includes generating a trace request at an initiator node configured for segment routing, the trace request comprising an FEC (Forwarding Equivalence Class) query corresponding to a label in an FEC stack with an unknown FEC, transmitting the trace request on a path with the unknown FEC, and receiving a response to the trace request, the response comprising FEC information including an identifier associated with a label and a forwarding path and representing a class or category of packets. An apparatus is also disclosed herein.