公开(公告)号：US11477111B2

公开(公告)日：2022-10-18

申请号：US17365889

申请日：2021-07-01

申请人： HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

发明人： Richard A. Barry ,  Lei Zhang

IPC分类号： G06F15/173 ,  H04L45/02 ,  H04L45/18 ,  H04L45/00 ,  H04L45/745 ,  H04L43/0817 ,  H04L45/42 ,  H04L45/48 ,  H04L45/50 ,  H04L47/125 ,  H04L49/101 ,  H04L49/253 ,  H04L12/46 ,  H04L45/16

摘要： A method for setting up forwarding tables is described. A USAT part for a node is received. The USAT part includes glow definitions and a FGPL. Each glow describes network traffic flows and role instructions for the flows. Each FGP describes a role for the switching node; a validity rule; and relevant network topology. The method also includes determining a selected active FGP in the FGPL using the validity rule for the FGP, a network state and the ordering of the FGPs; initializing the glows, requesting a role identification to perform based on the selected FGP, determining the role instructions and instructing the TMS to update tables accordingly; and storing entries in software tables based on glows and the role instructions for the identified role, dynamically resolving conflicts among entries, and granting table updates to hardware tables. The tables include a software table for each hardware memory for forwarding packets.

公开(公告)号：US20240356835A1

公开(公告)日：2024-10-24

申请号：US18305157

申请日：2023-04-21

申请人： Huawei Technologies Co., Ltd.

发明人： Huaimo Chen

IPC分类号： H04L45/00 ,  H04L45/02 ,  H04L45/18

CPC分类号： H04L45/22 ,  H04L45/02 ,  H04L45/18

摘要： A method implemented by a network node in a Bit Index Explicit Replication (BIER) domain is used to provide fast reroute protection. The method includes copying a bit index routing table (BIRT) of the network node, changing a neighbor node in the copied BIRT to one of a plurality of backup neighbor nodes to generate a backup BIRT, deriving a backup bit index forwarding table (BIFT) from the backup BIRT, and forwarding a packet in accordance with the backup BIFT when the neighbor node has failed.

公开(公告)号：US12058028B2

公开(公告)日：2024-08-06

申请号：US17423388

申请日：2019-01-24

申请人： Telefonaktiebolaget LM Ericsson (publ)

发明人： Naga Sricharan Parakala ,  Satheesh Kumar Karra

IPC分类号： H04L45/18 ,  H04L45/00 ,  H04L45/02 ,  H04L45/12

CPC分类号： H04L45/18 ,  H04L45/02 ,  H04L45/12 ,  H04L45/22

摘要： Methods and systems to prevent micro-loops between two network devices when there is a change in network topology. In one embodiment, a method is performed by a network device in a communications network, the method comprising computing a shortest path from the network device to a destination network device and identifying a backup network device for the network device to the destination network device, where the backup network device is a neighboring network device of the network device and is on an alternative path to the destination network device. The method further comprises determining a packet destined to the destination network device is received from a downstream network device of the network device, where the downstream network device is closer than the network device on the shortest path to the destination network device, and forwarding the packet to the backup network device based on the determination.

公开(公告)号：US11882026B2

公开(公告)日：2024-01-23

申请号：US17729865

申请日：2022-04-26

申请人： Huawei Technologies Co., Ltd.

发明人： Zhibo Hu ,  Peng Zhang

IPC分类号： H04L45/28 ,  H04L45/02 ,  H04L45/12 ,  H04L45/18 ,  H04L45/00 ,  H04L101/659

CPC分类号： H04L45/28 ,  H04L45/04 ,  H04L45/12 ,  H04L45/18 ,  H04L45/22 ,  H04L2101/659

摘要： A method for packet transmission in a network includes receiving, by a first node, a second segment identifier sent by the third node, receiving, by the first node, a packet sent by the second node through the first path, determining, by the first node, that a next-hop node of the first node on the first path is faulty, and in response to the determining, by the first node, that a next-hop node of the first node on the first path is faulty, adding, by the first node, the second segment identifier to the packet, and sending the packet to the third node through a second path, where the second path is established by the first node based on the second segment identifier.

公开(公告)号：US11876706B2

公开(公告)日：2024-01-16

申请号：US17744335

申请日：2022-05-13

申请人： Juniper Networks, Inc.

发明人： Kireeti Kompella ,  Wen Lin ,  Kevin Wang

IPC分类号： H04L45/50 ,  H04L12/46 ,  H04L45/18 ,  H04L45/00 ,  H04L69/22

CPC分类号： H04L45/507 ,  H04L12/4633 ,  H04L45/18 ,  H04L45/20 ,  H04L45/22 ,  H04L69/22

摘要： In some cases, once Fast Reroute (FRR) has taken place (e.g., for MPLS protection), a further FRR is undesirable, and even detrimental. A mechanism to prevent a further FRR, once such a further FRR is determined to be potentially harmful, is described.

公开(公告)号：US11716250B2

公开(公告)日：2023-08-01

申请号：US17580153

申请日：2022-01-20

申请人： Cisco Technology, Inc.

发明人： Jigar Dinesh Parekh ,  Vinay Prabhu ,  Sarah Adelaide Evans ,  Suraj Rangaswamy

IPC分类号： H04L41/0816 ,  H04L41/0893 ,  H04L41/12 ,  H04L45/745 ,  H04L41/0895 ,  H04L41/0894 ,  H04L41/0897 ,  H04L41/122 ,  H04L41/40 ,  H04L41/0213 ,  H04L45/18

CPC分类号： H04L41/0816 ,  H04L41/0893 ,  H04L41/12 ,  H04L45/74591

摘要： Systems, methods, and computer-readable media for scaling a source network. A system may be configured to receive a network configuration for a source network, wherein the source network comprising a plurality of nodes, receive and a scale target for a scaled network, and identify, based on the scale target, one or more selected nodes in the plurality of nodes in the source network for implementing in the scaled network. The system may further be configured to reconfigure data plane parameters and control plane parameters for each node in the one or more selected nodes.

公开(公告)号：US20230239235A1

公开(公告)日：2023-07-27

申请号：US18001233

申请日：2020-09-17

申请人： Telefonaktiebolaget LM Ericsson (publ)

发明人： Jiang HE ,  Zhe ZHOU ,  Xianmin LI ,  Haifeng QU

IPC分类号： H04L45/18 ,  H04L45/02 ,  H04L45/50

CPC分类号： H04L45/18 ,  H04L45/04 ,  H04L45/50 ,  H04L12/4641

摘要： A method by a network device functioning as a provider edge (PE) in an ethernet virtual private network (EVPN) to prevent transient loops between multi-home peer PEs. The method includes advertising a first EVPN label to one or more PEs that are multi-home peer PEs of the PE, advertising a second EVPN label to one or more PEs that are not multi-home peer PEs of the PE, receiving first traffic for a CE that is encapsulated with the first EVPN label as opposed to the second EVPN label, and discarding the first traffic in response to determining that a link between the PE and the CE is not operational and the first traffic for the CE is encapsulated with the first EVPN label.

公开(公告)号：US20220360519A1

公开(公告)日：2022-11-10

申请号：US17624380

申请日：2020-04-08

申请人： ZTE Corporation

发明人： Benchong XU ,  Huilai WANG

IPC分类号： H04L45/18 ,  H04L45/745 ,  H04L45/00

摘要： Provided are a method and device for packet forwarding. The method comprises: interface direction information and a routing table issued by a control plane are received, where a route in the routing table carries a routing direction identifier; when a packet is received from an interface, a forwarding plane determines the interface direction of an incoming interface of the packet according to the interface direction information, and determines a routing direction of the packet according to the routing direction identifier; if the interface direction of the incoming interface matches the routing direction, then the packet is forwarded; and if not, then the packet is discarded.

公开(公告)号：US11463345B2

公开(公告)日：2022-10-04

申请号：US17146338

申请日：2021-01-11

申请人： HUAWEI TECHNOLOGIES CO., LTD.

发明人： Haijun Xu ,  Shunwan Zhuang ,  Haibo Wang

IPC分类号： H04L1/00 ,  H04L45/02 ,  H04L12/66 ,  H04L45/18 ,  H04L65/1069 ,  H04L45/28 ,  H04L45/128 ,  H04L65/1101

摘要： A method includes: establishing, by a first network device, a first BMP session with a second network device, and establishing a second BMP session with a third network device; receiving a first BGP route set sent by the second network device, where the first BGP route set includes a BGP route sent by the second network device to the third network device; receiving a second BGP route set sent by the third network device, where the second BGP route set includes the BGP route received by the third network device from the second network device; and when detecting that the second BGP route set includes a first BGP route but the first BGP route set does not include the first BGP route, determining the first BGP route as an unavailable route.

公开(公告)号：US11431608B2

公开(公告)日：2022-08-30

申请号：US17039142

申请日：2020-09-30

申请人： Cisco Technology, Inc.

发明人： Patrice Brissette ,  Ali Sajassi ,  Mei Zhang ,  Luc Andre Burdet

IPC分类号： H04L12/18 ,  H04L12/46 ,  H04L12/66 ,  H04L41/04 ,  H04L41/0654 ,  H04L41/0677 ,  H04L41/12 ,  H04L45/00 ,  H04L45/02 ,  H04L45/16 ,  H04L45/18 ,  H04L45/28 ,  H04L45/50 ,  H04L45/745 ,  H04L47/10 ,  H04L47/125 ,  H04L47/25 ,  H04L47/70 ,  H04L47/80 ,  H04L49/201 ,  H04L49/354 ,  H04L49/65 ,  H04L69/00 ,  H04L69/18 ,  H04L69/32 ,  H04L69/322 ,  H04L69/324 ,  H04L69/40 ,  H04L69/30

摘要： In one embodiment, a method according to the present disclosure includes receiving a topology change advertisement at a remote core edge node and performing a network address information removal operation. The topology change advertisement is received from a core edge node that is in communication with an access network. The topology change advertisement indicates that a topology change has occurred in the access network. The network address information removal operation removes network address information stored by the remote core edge node. The network address information is used by the remote core edge node in participating in communications with the core edge node.