公开(公告)号：US10320476B2

公开(公告)日：2019-06-11

申请号：US15796548

申请日：2017-10-27

Applicant: Cisco Technology, Inc.

Inventor： Akshaya Nadahalli ,  Antonello Bonfanti ,  Gabriele M. Galimberti ,  Manoj Kumar ,  Zafar Ali

IPC: H04B10/27 ,  H04B10/032 ,  H04B10/075 ,  H04L29/08

Abstract: A method is disclosed for use by a network element coupled with an optical transport network. The method comprises calculating an optical path from a first packet-terminated optical interface of the network element to a second packet-terminated optical interface of a destination network element coupled with the optical transport network, and signaling the optical transport network to create the optical path. The method further comprises creating an Ethernet interface corresponding to the first packet-terminated optical interface, and adding the Ethernet interface to an Ethernet bundle interface. The method further comprises communicating across the optical path using addressing of the Ethernet bundle interface.

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：US20140211632A1

公开(公告)日：2014-07-31

申请号：US13754247

申请日：2013-01-30

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Tarek Saad ,  Sherif Saeed Awad ,  Zafar Ali ,  Michel Taillon

IPC: H04L12/56

CPC classification number: H04L45/124 ,  H04L45/125 ,  H04L45/24 ,  H04L45/50 ,  H04L45/62

Abstract: In one embodiment, a node in a communication network receives a label switched path (LSP) request and in response, the node determines at least two equal cost paths, each path having one or more path-nodes. The node may then further determine a total bandwidth-based transition value for each path of the at least two equal cost paths and selects the path having a lower total transition value. Once selected, the node may establish the requested LSP over the selected path.

Abstract translation: 在一个实施例中，通信网络中的节点接收标签交换路径（LSP）请求，并且作为响应，节点确定至少两个相等的成本路径，每个路径具有一个或多个路径节点。 然后，节点可以进一步确定至少两个相等成本路径的每个路径的总带宽转换值，并选择具有较低总转换值的路径。 一旦选择，节点可以在所选路径上建立所请求的LSP。

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：US20230283568A1

公开(公告)日：2023-09-07

申请号：US18179145

申请日：2023-03-06

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  Zafar Ali ,  Pablo Camarillo Garvia ,  Francois Clad

IPC: H04L47/6295 ,  H04L43/0888 ,  H04L47/10 ,  H04L47/24 ,  H04L47/70 ,  H04W76/11 ,  H04L41/12

CPC classification number: H04L47/6295 ,  H04L43/0888 ,  H04L47/10 ,  H04L47/24 ,  H04L47/70 ,  H04W76/11 ,  H04L41/12

Abstract: The present technology is directed to a system and method for implementing network resource partitioning and Quality of Service (QoS) separation through network slicing. Embodiments of the present invention describe scalable network slicing method based on defining Segment Routing Flexible Algorithm to represent a network slice and assigning a distinct QoS policy queue to each of the Flexible Algorithms configured on a network node. Therefore, scalable network slice based queuing is implemented wherein a single packet processing queue is assigned to each Flex-Algorithm based network slice. QoS policy queue may be implemented in a hierarchical fashion by differentiation between flow packets in a single QoS policy queue based on value of experimental bits in the header.

公开(公告)号：US20230138389A1

公开(公告)日：2023-05-04

申请号：US18148245

申请日：2022-12-29

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Zafar Ali ,  Syed Kamran Raza

IPC: H04L45/745 ,  H04L43/12

Abstract: The present disclosure includes methods, systems, and non-transitory computer-readable media for validating data in a data structure used for forwarding packets by a network device comprising sending a data packet probe identifying a destination and including a segment ID, wherein the segment ID maps to a first interpretation by a receiving router to perform an action on the data packet probe to rewrite a portion of a destination address in a header of the data packet probe, and to redirect the data packet probe to the network device that initiated the data packet probe.

公开(公告)号：US20220182322A1

公开(公告)日：2022-06-09

申请号：US17115451

申请日：2020-12-08

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Zafar Ali ,  Syed Kamran Raza

IPC: H04L12/741 ,  H04L12/26

Abstract: The present disclosure includes methods, systems, and non-transitory computer-readable media for validating data in a data structure used for forwarding packets by a network device comprising sending a data packet probe identifying a destination and including a segment ID, wherein the segment ID maps to a first interpretation by a receiving router to perform an action on the data packet probe to rewrite a portion of a destination address in a header of the data packet probe, and to redirect the data packet probe to the network device that initiated the data packet probe.

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：US11122346B1

公开(公告)日：2021-09-14

申请号：US16912238

申请日：2020-06-25

Applicant: Cisco Technology, Inc.

Inventor： Manoj Kumar ,  Sujal Sheth ,  Zafar Ali ,  Eric Voit ,  Shwetha Subray Bhandari

IPC: H04Q11/00 ,  H04L29/06

Abstract: The present technology discloses methods, systems, and non-transitory computer-readable media for receiving, by a relying node in an optical transport network environment, attestation information in a trail trace identifier of an optical unit from an attester node in the optical transport network environment; verifying a trustworthiness of the attester node by identifying a level of trust of the attester node from the attestation information; and controlling network service access of the attester node through the relying node in the network environment based on the level of trust of the attester node identified from the attestation information.

公开(公告)号：US20210029034A1

公开(公告)日：2021-01-28

申请号：US17066140

申请日：2020-10-08

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  Jisu Bhattacharya ,  Zafar Ali ,  Syed Kamran Raza

IPC: H04L12/749 ,  H04L12/741 ,  H04L12/751

Abstract: In one embodiment, a method includes receiving a packet comprising a destination address in a destination address field of the packet, where the destination address including at least a first global identifier and a second global identifier, determining that the first global identifier corresponds to the first network apparatus, determining that a local identifier in the destination address is associated with the first global identifier, identifying one or more instructions associated with the local identifier, performing one or more functions instructed by the one or more instructions, updating the destination address in the destination field of the packet to an updated destination address, determining a forwarding rule associated with the packet, and forwarding the packet with the updated destination address based on the forwarding rule.