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公开(公告)号：US11303585B2
公开(公告)日：2022-04-12
申请号：US17290397
申请日：2019-10-18
发明人： Shigemasa Kumagawa , Ken Takahashi
IPC分类号： H04L12/861 , H04L49/90
摘要： [Problem] To allocate IFs to be used in accordance with buffers such that no packet loss occurs in a case in which the transfer apparatus that performs packet transfer includes as many buffers with grouped interfaces (IFs) mounted in units of groups thereon as the number of groups.
[Solving Means] A packet transfer apparatus 10C has a plurality of buffers 11a to 11n mounting IFs in units of groups and performs, when the traffic amount at the time of packet transfer of the IFs of each of the buffers exceeds maximum transfer capacity of the IFs, buffering packets corresponding to the exceeding traffic amount in the buffers. An IF allocation unit 23 included in the transfer apparatus 10C selects, in a case in which IF groups with no occurrence of any loss indicating packet discarding are present at the time of the packet transfer in the IFs for a unit time from among all the IF groups, an IF group with a longest non-occurrence time of the buffering from among the IF groups with no occurrence of any loss and performs IF allocation of allocating traffic of packets to the IFs in the selected IF groups.-
公开(公告)号：US20210006485A1
公开(公告)日：2021-01-07
申请号：US16969735
申请日：2019-02-14
IPC分类号： H04L12/751 , H04L12/46
摘要： [Problem] A route information transfer device that transfers packets advertising route information between routers of different service types is provided.
[Solution] The route reflector (route information transfer device) 1 includes: a packet reception unit 11 that receives packets from a PE (router) 2; an information update unit 120 that updates a parameter related to the service type included in the received packet according to the PE 2 and the virtual private network, and stores the updated parameter in the service-type information storage unit 13; an information conversion unit 14 that refers to the service-type information storage unit 13 and converts the parameter related to the service type of the source PE2 of the packet into a parameter related to a service-type of the destination PE 2 in an identical virtual private network; and a packet transmission unit 16 that transmits a packet including the converted parameter to the destination PE 2.-
公开(公告)号：US20200382393A1
公开(公告)日：2020-12-03
申请号：US16970678
申请日：2019-02-18
IPC分类号： H04L12/26 , H04L12/713 , G06F16/2457 , G06F16/22 , H04L12/24
摘要： A network 50 is hierarchically divided into network devices 501 to 506, areas, and the like to be monitoring targets, and a monitoring device 100 monitors a divided monitoring target. A monitoring device of an N-th layer (here, N≥2) that is an upper layer with respect to a first layer monitors information of reachability between user connection points received from a monitoring device of an (N−1)-th layer that is a lower layer and network devices connecting monitoring targets of the (N−1)-th layer making up monitoring targets of the N-th layer and connection statuses between the network devices and areas that are monitoring targets. The monitoring device determines the presence/absence of reachability between user connection points belonging to different monitoring targets of the (N−1)-th layer on the basis of this reachability and the connection statuses.
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公开(公告)号：US12003397B2
公开(公告)日：2024-06-04
申请号：US18022699
申请日：2020-08-24
IPC分类号： H04L43/0852 , H04L45/302
CPC分类号： H04L43/0858 , H04L45/302
摘要： A delay measurement device measures a delay time of an end-to-end route path of a virtual private network related to a predetermined user. The delay measurement device includes a measurement route generation unit configured to generate a first route that transfers to a start point node of a route path, transfers back on the route path, and then returns to itself, and to generate a second route of a route that transfers to the start point node of the route path and returns to itself; a packet transmission/reception unit configured to transmit and receive packets circulating on the first route; a delay measurement unit configured to measure a time from transmission of the packet to reception of the packet to set the measured time as a delay time of the route; and a one-way delay calculation unit configured to calculate a one-way delay time of the route path.
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公开(公告)号：US11797291B2
公开(公告)日：2023-10-24
申请号：US17429784
申请日：2020-02-04
CPC分类号： G06F8/65 , G06F8/451 , G06F9/505 , G06F3/123 , H04W52/0219
摘要： A software update management apparatus includes a storage unit adapted to divide a network into one or more blocks and store block management information indicating whether each of network devices belonging to each of the resulting blocks is an active device or a standby device; an update instruction receiving unit adapted to receive software update instructions; a software update information generating unit adapted to generate software update information; a software updating unit adapted to perform software update processes after transferring traffic to standby devices in same blocks as respective active devices when it is determined that the network devices are active devices according to the software update information and thereby perform the software update processes for active devices or standby devices in different blocks in parallel.
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公开(公告)号：US11528204B2
公开(公告)日：2022-12-13
申请号：US16970678
申请日：2019-02-18
IPC分类号： H04L43/0811 , G06F16/22 , G06F16/2457 , H04L41/0654 , H04L43/0882 , H04L43/12 , H04L43/16 , H04L45/586 , H04L41/0695
摘要： A network 50 is hierarchically divided into network devices 501 to 506, areas, and the like to be monitoring targets, and a monitoring device 100 monitors a divided monitoring target. A monitoring device of an N-th layer (here, N≥2) that is an upper layer with respect to a first layer monitors information of reachability between user connection points received from a monitoring device of an (N−1)-th layer that is a lower layer and network devices connecting monitoring targets of the (N−1)-th layer making up monitoring targets of the N-th layer and connection statuses between the network devices and areas that are monitoring targets. The monitoring device determines the presence/absence of reachability between user connection points belonging to different monitoring targets of the (N−1)-th layer on the basis of this reachability and the connection statuses.
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公开(公告)号：US20220137950A1
公开(公告)日：2022-05-05
申请号：US17429784
申请日：2020-02-04
IPC分类号： G06F8/65
摘要： To ensure efficiency of software update operations while maintaining reliability of an entire network during the software update operations. A software update management apparatus 1 includes a storage unit 12 adapted to divide a network into one or more blocks and store block management information 100 indicating whether each of network devices belonging to each of the resulting blocks is an active device or a standby device; an update instruction receiving unit 101 adapted to receive software update instructions; a software update information generating unit 102 adapted to generate software update information 200; a software updating unit 103 adapted to perform software update processes after transferring traffic to standby devices in same blocks as respective active devices when it is determined that the network devices are active devices according to the software update information 200 and thereby perform the software update processes for active devices or standby devices in different blocks in parallel.
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公开(公告)号：US20210111913A1
公开(公告)日：2021-04-15
申请号：US16970545
申请日：2019-02-20
发明人： Ryuma Senoo , Ken Takahashi , Shigemasa Kumagawa
IPC分类号： H04L12/18 , H04L12/761
摘要： [Problem] To perform path switching quickly and efficiently when path switching is required in a multicast transfer system.
[Solution] In a multicast transfer system 10, a multicast group for transmitting the same packet from a sender (transmitting apparatus) 21 to a plurality of receivers (receiving apparatuses) 31, 32 is formed. A transfer apparatus 41 holds transfer destination data DB1 in which a group identifier for identifying a multicast group is associated with copy transfer destination information (multicast segment) for specifying another transfer apparatus to be used as a packet transfer destination when the packet is received. In copy transfer destination information, a plurality of other transfer apparatuses can be registered by adding a priority, and a plurality of group identifiers can be associated with a single piece of copy transfer destination information.-
公开(公告)号：US11343179B2
公开(公告)日：2022-05-24
申请号：US17272970
申请日：2019-09-09
IPC分类号： G06F15/173 , H04L45/00 , H04L45/02
摘要： A transfer apparatus configured to control transfer of a packet from a transmission source node to a destination node through segment routing includes: a storage unit storing node management information T1 indicating, for each node that functions as a transmission source node or a destination node, an SID list acquisition method of the nodes; a packet reception unit for receiving a reception packet from the destination node; an information setting unit for, if a destination-side SID list acquisition method of the destination node and a transmission source-side SID list acquisition method of the transmission source node do not match each other based on the node management information T1, setting the information that is needed to execute the transmission source-side SID list acquisition method in the reception packet; and a packet transmission unit configured to transmit the reception packet that was subjected to the setting to the transmission source node.
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公开(公告)号：US11750559B2
公开(公告)日：2023-09-05
申请号：US17776278
申请日：2019-11-15
发明人： Satoshi Nakatsukasa , Ken Takahashi
IPC分类号： H04L61/5014 , H04L61/5053 , H04L61/5076
CPC分类号： H04L61/5014 , H04L61/5053 , H04L61/5076
摘要： An edge switching device of an edge switching system includes: a remaining lease time information obtainment unit configured to obtain remaining lease time information for each of user terminals from a DHCP server; a submission order determination unit configured to determine a submission order for user configuration information in order from a shortest remaining lease time; a user configuration information submission unit configured to submit, to a backup system edge router, user configuration information of each of the user terminals, according to the determined submission order; and a reconnection inducement instruction unit configured to send, to the DHCP server, an instruction to send reconnection inducement information to the user terminals for which the user configuration information has been submitted.
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