公开(公告)号：US11736340B2

公开(公告)日：2023-08-22

申请号：US17342899

申请日：2021-06-09

Applicant: Cisco Technology, Inc.

Inventor： Peter Psenak ,  Lester C. Ginsberg ,  Ketan Jivan Talaulikar ,  Clarence Filsfils ,  Francois Clad ,  Stephane Litkowski

IPC: H04L12/24 ,  H04L41/0654 ,  H04L41/0631 ,  H04L41/0686

CPC classification number: H04L41/0654 ,  H04L41/0631 ,  H04L41/0686

Abstract: The present technology is directed to signaling unreachability of a network device, more specifically, a prefix of the network device in network that utilizes route summarization. A pulse trigger agent can detect an unreachability of at least one Provider Edge (PE) device in a network domain of a network and determine that a route summarization is being used within the network where the unreachability of the at least one PE device is hidden by the route summarization. A pulse distribution agent can transmit a failure message informing other PE devices of the unreachability of the at least one PE device.

公开(公告)号：US20240372816A1

公开(公告)日：2024-11-07

申请号：US18774138

申请日：2024-07-16

Applicant: Cisco Technology, Inc.

Inventor： Peter Psenak ,  Marek Karasek ,  Lester C. Ginsberg

IPC: H04L47/25 ,  H04L47/26

Abstract: In one embodiment, a method for link state flooding between a network node and a receiving node includes determining a current transmit rate that Link State Protocol Data Units (LSPs) are being transmitted from the network node to the receiving node. The method further includes determining an LSP acknowledgment rate that indicates a rate at which a plurality of LSP acknowledgments are received at the network node from the receiving node. The method further includes determining a new transmit rate based on the current transmit rate and the LSP acknowledgment rate. The method further includes transmitting a plurality of LSPs from the network node to the receiving node using the new transmit rate.

公开(公告)号：US20150085706A1

公开(公告)日：2015-03-26

申请号：US14038525

申请日：2013-09-26

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Lester C. Ginsberg ,  Varun Shah ,  Lakshmi Priya Sarma ,  Ramkumar Parameswaran

IPC: H04L12/751 ,  H04L12/753 ,  H04L12/761

CPC classification number: H04L45/48 ,  H04L45/16

Abstract: An example method for convergence of multi-destination traffic in a network environment is provided and includes receiving a first type-length-value (TLV) message from a true broadcast root in a Transparent Interconnection of Lots of Links (TRILL) network, where the first TLV message indicates a first subset of multi-destination trees in the TRILL network, receiving a second TLV message from the true broadcast root indicating a second subset of multi-destination trees in the TRILL network, such that a union of the first subset and the second subset indicates at least one inactive multi-destination tree in the TRILL network, and deleting the inactive tree from a hash table of active trees.

Abstract translation: 提供了一种用于在网络环境中的多目的地业务的收敛的示例性方法，并且包括在多个链路（TRILL）网络的透明互连中从真实广播根接收第一类型长度值（TLV）消息，其中 第一TLV消息指示TRILL网络中的多目的地树的第一子集，从真实广播根接收指示TRILL网络中的多目的地树的第二子集的第二TLV消息，使得第一子集和 第二子集指示TRILL网络中的至少一个非活动多目的地树，以及从活动树的哈希表中删除非活动树。

公开(公告)号：US20230396486A1

公开(公告)日：2023-12-07

申请号：US18345246

申请日：2023-06-30

Applicant: Cisco Technology, Inc.

Inventor： Peter Psenak ,  Lester C. Ginsberg ,  Ketan Jivan Talaulikar ,  Clarence Filsfils ,  Francois Clad ,  Stephane Litkowski

IPC: H04L41/0654 ,  H04L41/0631 ,  H04L41/0686

CPC classification number: H04L41/0654 ,  H04L41/0631 ,  H04L41/0686

Abstract: The present technology is directed to signaling unreachability of a network device, more specifically, a prefix of the network device in network that utilizes route summarization. A pulse trigger agent can detect an unreachability of at least one Provider Edge (PE) device in a network domain of a network and determine that a route summarization is being used within the network where the unreachability of the at least one PE device is hidden by the route summarization. A pulse distribution agent can transmit a failure message informing other PE devices of the unreachability of the at least one PE device.

公开(公告)号：US09203744B2

公开(公告)日：2015-12-01

申请号：US14038525

申请日：2013-09-26

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Lester C. Ginsberg ,  Varun Shah ,  Lakshmi Priya Sarma ,  Ramkumar Parameswaran

IPC: H04J1/16 ,  H04L12/753 ,  H04L12/761

CPC classification number: H04L45/48 ,  H04L45/16

Abstract: An example method for convergence of multi-destination traffic in a network environment is provided and includes receiving a first type-length-value (TLV) message from a true broadcast root in a Transparent Interconnection of Lots of Links (TRILL) network, where the first TLV message indicates a first subset of multi-destination trees in the TRILL network, receiving a second TLV message from the true broadcast root indicating a second subset of multi-destination trees in the TRILL network, such that a union of the first subset and the second subset indicates at least one inactive multi-destination tree in the TRILL network, and deleting the inactive tree from a hash table of active trees.

Abstract translation: 提供了一种用于在网络环境中的多目的地业务的收敛的示例性方法，并且包括在多个链路（TRILL）网络的透明互连中从真实广播根接收第一类型长度值（TLV）消息，其中 第一TLV消息指示TRILL网络中的多目的地树的第一子集，从真实广播根接收指示TRILL网络中的多目的地树的第二子集的第二TLV消息，使得第一子集和 第二子集指示TRILL网络中的至少一个非活动多目的地树，以及从活动树的哈希表中删除不活动树。

公开(公告)号：US12132606B2

公开(公告)日：2024-10-29

申请号：US18345246

申请日：2023-06-30

Applicant: Cisco Technology, Inc.

Inventor： Peter Psenak ,  Lester C. Ginsberg ,  Ketan Jivan Talaulikar ,  Clarence Filsfils ,  Francois Clad ,  Stephane Litkowski

IPC: H04L41/0654 ,  H04L41/0631 ,  H04L41/0686

CPC classification number: H04L41/0654 ,  H04L41/0631 ,  H04L41/0686

Abstract: The present technology is directed to signaling unreachability of a network device, more specifically, a prefix of the network device in network that utilizes route summarization. A pulse trigger agent can detect an unreachability of at least one Provider Edge (PE) device in a network domain of a network and determine that a route summarization is being used within the network where the unreachability of the at least one PE device is hidden by the route summarization. A pulse distribution agent can transmit a failure message informing other PE devices of the unreachability of the at least one PE device.

公开(公告)号：US12068969B2

公开(公告)日：2024-08-20

申请号：US17493498

申请日：2021-10-04

Applicant: Cisco Technology, Inc.

Inventor： Peter Psenak ,  Marek Karasek ,  Lester C. Ginsberg

IPC: H04L47/25 ,  H04L47/26

CPC classification number: H04L47/25 ,  H04L47/26

Abstract: In one embodiment, a method for link state flooding between a network node and a receiving node includes determining a current transmit rate that Link State Protocol Data Units (LSPs) are being transmitted from the network node to the receiving node. The method further includes determining an LSP acknowledgment rate that indicates a rate at which a plurality of LSP acknowledgments are received at the network node from the receiving node. The method further includes determining a new transmit rate based on the current transmit rate and the LSP acknowledgment rate. The method further includes transmitting a plurality of LSPs from the network node to the receiving node using the new transmit rate.

公开(公告)号：US20220400048A1

公开(公告)日：2022-12-15

申请号：US17342899

申请日：2021-06-09

Applicant: Cisco Technology, Inc.

Inventor： Peter Psenak ,  Lester C. Ginsberg ,  Ketan Jivan Talaulikar ,  Clarence Filsfils ,  Francois Clad ,  Stephane Litkowski

IPC: H04L12/24

Abstract: The present technology is directed to signaling unreachability of a network device, more specifically, a prefix of the network device in network that utilizes route summarization. A pulse trigger agent can detect an unreachability of at least one Provider Edge (PE) device in a network domain of a network and determine that a route summarization is being used within the network where the unreachability of the at least one PE device is hidden by the route summarization. A pulse distribution agent can transmit a failure message informing other PE devices of the unreachability of the at least one PE device.

公开(公告)号：US20240430154A1

公开(公告)日：2024-12-26

申请号：US18829447

申请日：2024-09-10

Applicant: Cisco Technology, Inc.

Inventor： Peter Psenak ,  Lester C. Ginsberg ,  Ketan Jivan Talaulikar ,  Clarence Filsfils ,  Francois Clad ,  Stephane Litkowski

IPC: H04L41/0654 ,  H04L41/0631 ,  H04L41/0686

Abstract: The present technology is directed to signaling unreachability of a network device, more specifically, a prefix of the network device in network that utilizes route summarization. A pulse trigger agent can detect an unreachability of at least one Provider Edge (PE) device in a network domain of a network and determine that a route summarization is being used within the network where the unreachability of the at least one PE device is hidden by the route summarization. A pulse distribution agent can transmit a failure message informing other PE devices of the unreachability of the at least one PE device.

公开(公告)号：US20240064092A1

公开(公告)日：2024-02-22

申请号：US18501775

申请日：2023-11-03

Applicant: Cisco Technology, Inc.

Inventor： Alfred Clarence Lindem, III ,  Lester C. Ginsberg ,  Peter Psenak

IPC: H04L45/122 ,  H04L45/00 ,  H04L45/02

CPC classification number: H04L45/122 ,  H04L45/02 ,  H04L45/20

Abstract: Techniques are described for providing a method and apparatus for determining source address validation of a data packet in a network in the presence of asymmetric routing. When a data packet is received by a node such as a router, a reverse path forwarding lookup is performed to determine if the data packet was received on a next-hop interface and if the reverse path forwarding fails, a Shortest Path First (SPF) computation at the router advertising the source route will be performed using the link state database to determine whether the data packet arrived from a valid path of the network.