公开(公告)号：US20190104058A1

公开(公告)日：2019-04-04

申请号：US15841276

申请日：2017-12-13

Applicant: Cisco Technology, Inc.

Inventor： 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: H04L12/721 ,  H04L12/751 ,  H04L12/26

Abstract: 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：US20180026880A1

公开(公告)日：2018-01-25

申请号：US15253487

申请日：2016-08-31

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Faisal Iqbal

IPC: H04L12/723 ,  H04L12/733

CPC classification number: H04L45/50 ,  H04L45/20 ,  H04L45/26 ,  H04L47/825

Abstract: In one embodiment, a method includes generating a first trace request at an initiator node configured for segment routing, the first trace request comprising a query for FEC (Forwarding Equivalence Class) information, transmitting the first trace request on a path comprising at least one node wherein FEC details for the node are unknown by the initiator node, receiving a response to the first trace request comprising the FEC information, transmitting a second trace request with the FEC information, and receiving a response to the second trace request providing FEC validation. An apparatus is also disclosed herein.

公开(公告)号：US11924090B2

公开(公告)日：2024-03-05

申请号：US18147158

申请日：2022-12-28

Applicant: Cisco Technology, Inc.

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

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

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

Abstract: 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：US11388088B2

公开(公告)日：2022-07-12

申请号：US16675083

申请日：2019-11-05

Applicant: Cisco Technology, Inc.

Inventor： 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: H04L45/00 ,  H04L43/106 ,  H04L45/02 ,  H04L41/0246 ,  H04L101/659 ,  H04L45/302 ,  H04L45/741

Abstract: 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：US10581732B2

公开(公告)日：2020-03-03

申请号：US16259435

申请日：2019-01-28

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Faisal Iqbal

IPC: H04L1/00 ,  H04L12/723 ,  H04L12/911 ,  H04L12/721 ,  H04L12/701 ,  H04L12/751 ,  H04L12/703 ,  H03M13/47 ,  H04L12/733 ,  H04W12/10

Abstract: 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.

公开(公告)号：US10237173B2

公开(公告)日：2019-03-19

申请号：US15253487

申请日：2016-08-31

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Faisal Iqbal

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

Abstract: In one embodiment, a method includes generating a first trace request at an initiator node configured for segment routing, the first trace request comprising a query for FEC (Forwarding Equivalence Class) information, transmitting the first trace request on a path comprising at least one node wherein FEC details for the node are unknown by the initiator node, receiving a response to the first trace request comprising the FEC information, transmitting a second trace request with the FEC information, and receiving a response to the second trace request providing FEC validation. An apparatus is also disclosed herein.

公开(公告)号：US20180278510A1

公开(公告)日：2018-09-27

申请号：US15468890

申请日：2017-03-24

Applicant: CISCO TECHNOLOGY, INC.

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

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

CPC classification number: H04L45/02 ,  H04L45/50 ,  H04L47/125

Abstract: 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.