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公开(公告)号：US20240163202A1
公开(公告)日：2024-05-16
申请号：US18391242
申请日：2023-12-20
Applicant: Huawei Technologies Co., Ltd.
Inventor： Huaimo Chen
Abstract: A method implemented by a network node in a BIER domain includes obtaining, by a control plane of the network node, an IP LFA from a FIB or RIB through a first interface, using, by the control plane of the network node, the IP LFA to build a BIFTe when the IP LFA is an expected type, accessing, by the control plane of the network node, a BIER network topology in an LSDB through a second interface, computing an LFA of the expected type, and using the LFA to build the BIFTe when the IP LFA is not of the expected type, updating, by the control plane of the network node, the BIFTe in a data plane of the network node through a third interface; and forwarding, by the data plane of the network node, BIER packets using the BIFTe to avoid a failure.
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公开(公告)号：US20240163199A1
公开(公告)日：2024-05-16
申请号：US18516090
申请日：2023-11-21
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Huaimo Chen , Dean Cheng
IPC: H04L45/021 , H04L45/00
CPC classification number: H04L45/021 , H04L45/26 , H04L45/32
Abstract: A network node (N1) for handling IGP flooding topology (FT) inconsistency by obtaining a new FT and setting a FT flag field (FT field) in a data packet (DP) to indicate whether a link between N1 and a second node (N2) is on the new FT. N1 transmits the DP to N2. N1 receives a second DP from N2 that includes the FT field set by N2 to indicate whether the link between the network node and N2 is on the new FT as determined by N2. N1 sets a FT inconsistency field in a link state packet to indicate an inconsistency in the new FT when the FT field set by N2 and the FT field set by N1 are different for a given time. N1 distributes the LS to at least one node in the network.
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公开(公告)号：US11888596B2
公开(公告)日：2024-01-30
申请号：US17886347
申请日：2022-08-11
Applicant: Huawei Technologies Co., Ltd.
Inventor： Huaimo Chen , Donald Eggleston Eastlake, III
IPC: H04L41/0893 , H04L41/0695 , H04L41/0668 , H04L41/0686
CPC classification number: H04L41/0695 , H04L41/0668 , H04L41/0686 , H04L41/0893
Abstract: A method performed by a network controller for providing network reliability. The method includes employing an Interior Gateway Protocol (IGP) proxy configured to communicate controller information about the network controller to the one or more network elements using IGP (Link-State Advertisement (LSA) or Link State Protocol Data Unit (LSP)) with a Controllers TLV. The method uses the controller information for proper election of a primary controller in the event of a network failure.
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公开(公告)号：US20230353484A1
公开(公告)日：2023-11-02
申请号：US18350593
申请日：2023-07-11
Applicant: Huawei Technologies Co., Ltd.
Inventor： Huaimo Chen
Abstract: A method is implemented by a first PCE controlling a BIER-TE domain. The method comprises receiving a first path computation element protocol (PCEP) message from a path computation component (PCC) running on each egress network node, where the first PCEP message contains a multicast group and a multicast source; obtaining an ingress node based on the multicast group and the multicast source; computing a BIER-TE path from the ingress node to each egress network node; sending a second PCEP message to the ingress node for the ingress node to create the BIER-TE path to transport packets for the multicast group and the multicast source; and receiving a third PCEP message from a PCC running on the ingress node, where the third PCEP message includes a status of the BIER-TE path.
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公开(公告)号：US20230262112A1
公开(公告)日：2023-08-17
申请号：US18303747
申请日：2023-04-20
Applicant: Huawei Technologies Co., Ltd.
Inventor： Linda Dunbar , Huaimo Chen
IPC: H04L67/1004 , H04L45/12 , H04L45/02
CPC classification number: H04L67/1004 , H04L45/124 , H04L45/04
Abstract: A method used by an egress router is disclosed. The egress router obtains a capacity index of an application server attached to the egress router. The egress router further obtains a load index describing a load measurement between the egress router and the application server during a certain time period. The egress router encodes the capacity index and the load index into a packet. The egress router transmits the packet to one or more routers in an Internet protocol (IP) network.
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Patent Agency Ranking
公开(公告)号：US20230017665A1
公开(公告)日：2023-01-19
申请号：US17952334
申请日：2022-09-26
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Huaimo Chen , Dean Cheng
Abstract: Disclosed is a mechanism for implementing link state flooding reduction (LSFR) in an Interior Gateway Protocol (IGP) network. The mechanism includes receiving data indicating connectivity of a plurality of nodes in the network. A flooding topology is built based on the connectivity. This includes selecting one of the nodes as a root node, and building a tree of links connecting the root node to the nodes in the network. The flooding topology is stored in a memory. The flooding topology may not be to the remaining nodes in the network. Link state messages may then be flooded over the flooding topology.
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公开(公告)号：US11558282B2
公开(公告)日：2023-01-17
申请号：US17068457
申请日：2020-10-12
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Huaimo Chen , Zhenbin Li
Abstract: A method, performed by a network node, for enabling Interior Gateway Protocol (IGP) fast convergence, the method includes determining that there is a significant change in link state information, the significant change is at least one of a link down, a link up, and a link metric change. The method further includes originating a link state packet comprising a flag that is set to indicate the significant change in the link state information; and distributing the link state packet.
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公开(公告)号：US20220417136A1
公开(公告)日：2022-12-29
申请号：US17896514
申请日：2022-08-26
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Huaimo Chen
IPC: H04L45/28
Abstract: A method implemented by a secondary controller in a controller cluster including a primary controller and the secondary controller. The method includes detecting a failure of a communication link between the primary controller and the secondary controller; transmitting a first message to a network element (NE) in communication with the primary controller and the secondary controller, wherein the first message includes a controllers type length value (TLV) structure with an indication that the secondary controller is attempting to promote itself to a new primary controller for the controller cluster based on detection of the failure; receiving a second message from the network element, wherein the second message includes a second controllers TLV structure that indicates a status of the primary controller; and determining to maintain its position as the secondary controller for the controller cluster when the status of the primary controller is active.
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公开(公告)号：US11489766B2
公开(公告)日：2022-11-01
申请号：US16969911
申请日：2018-12-05
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Huaimo Chen , Dean Cheng
IPC: H04L12/721 , H04L12/751 , H04L12/703 , H04L12/753 , H04L45/00 , H04L45/02 , H04L45/12 , H04L45/28 , H04L45/44 , H04L45/48
Abstract: Disclosed is a mechanism for implementing link state flooding reduction (LSFR) in an Interior Gateway Protocol (IGP) network. The mechanism includes receiving data indicating connectivity of a plurality of nodes in the network. A flooding topology is built based on the connectivity. This includes selecting one of the nodes as a root node, and building a tree of links connecting the root node to the nodes in the network. The flooding topology is stored in a memory. The flooding topology may not be to the remaining nodes in the network. Link state messages may then be flooded over the flooding topology.
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公开(公告)号：US20220272024A1
公开(公告)日：2022-08-25
申请号：US17694094
申请日：2022-03-14
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Huaimo Chen , Dean Cheng
IPC: H04L45/021 , H04L45/00
Abstract: A network node (N1) for handling IGP flooding topology (FT) inconsistency by obtaining a new FT and setting a FT flag field (FT field) in a data packet (DP) to indicate whether a link between N1 and a second node (N2) is on the new FT. N1 transmits the DP to N2. N1 receives a second DP from N2 that includes the FT field set by N2 to indicate whether the link between the network node and N2 is on the new FT as determined by N2. N1 sets a FT inconsistency field in a link state packet to indicate an inconsistency in the new FT when the FT field set by N2 and the FT field set by N1 are different for a given time. N1 distributes the LS to at least one node in the network.
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