公开(公告)号：CA2924210A1

公开(公告)日：2015-04-02

申请号：CA2924210

申请日：2014-09-25

Applicant: CISCO TECH INC

Inventor： THUBERT PASCAL ,  LEVY-ABEGNOLI ERIC ,  WETTERWALD PATRICK ,  VASSEUR JEAN-PHILIPPE

IPC: H04L45/42 ,  H04W40/26 ,  H04W40/28 ,  H04W40/30

Abstract: In one embodiment, a device both communicates with a network operating a distributed proactive routing protocol, and participates in a centralized path computation protocol. The device communicates routing characteristics of the distributed proactive routing protocol for the network from the network to the centralized path computation protocol, and also communicates one or more computed paths from the centralized path computation protocol to the network, where the computed paths from the centralized path computation protocol are based on the routing characteristics of the distributed proactive routing protocol for the network.

公开(公告)号：CA2920018A1

公开(公告)日：2015-02-12

申请号：CA2920018

申请日：2014-05-29

Applicant: CISCO TECH INC

Inventor： HUI JONATHAN W ,  HONG WEI ,  VASSEUR JEAN-PHILIPPE

IPC: H04W84/18 ,  H04B1/713

Abstract: In a multiple interface, low power and lossy network comprising a plurality of nodes, a low transmission power and medium transmission power topology are defined for the network and a channel-hopping schedule is defined for the devices operating in each topology. A mixed channel-hopping sequence comprising an interleaved low- power channel hopping sequence and a medium-power channel hopping sequence is generated, such that a single device in the network may allow neighboring devices in the network to use both low-power and medium-power channels to communicate with the single device.

公开(公告)号：CA2889988A1

公开(公告)日：2014-05-08

申请号：CA2889988

申请日：2013-10-30

Applicant: CISCO TECH INC

Inventor： HUI JONATHAN W ,  HONG WEI ,  VASSEUR JEAN-PHILIPPE

IPC: H04B1/7156 ,  H04W56/00

Abstract: In one embodiment, a device determines a need to resynchronize a broadcast and unicast frequency-hopping schedules on its network interface. In response to the need, the device may solicit the broadcast schedule from one or more neighbor devices having the synchronized broadcast schedule, and then establishes the unicast schedule for the network interface using communication during the synchronized broadcast schedule.

公开(公告)号：AT511726T

公开(公告)日：2011-06-15

申请号：AT06739254

申请日：2006-03-22

Applicant: CISCO TECH INC

Inventor： GUICHARD JAMES ,  VASSEUR JEAN-PHILIPPE ,  NADEAU THOMAS ,  WARD DAVID

IPC: H04L12/28 ,  H04L12/56

Abstract: A system and method for aggregating performance characteristics for core network paths allows computation of message traffic performance over each of the available candidate paths through the core for identifying an optimal core network path. Particular network traffic, or messages, include attributes indicative of performance, such as transport time, delay, jitter, and drop percentage, over individual hops along the candidate path. A diagnostic processor parses these messages to identify the attributes corresponding to performance, and analyzes the resulting parsed routing information to compute an expected performance, such as available bandwidth (e.g. transport rate) over the path. Messages including such attributes may include link state attribute (LSA) messages, diagnostic probe messages specifically targeted to enumerate such attributes, or other network suitable network traffic. In a particular configuration, the messages may be Path Verification Protocol (PVP) messages.

公开(公告)号：DE602006020023D1

公开(公告)日：2011-03-24

申请号：DE602006020023

申请日：2006-03-14

Applicant: CISCO TECH INC

Inventor： FILSFILS CLARENCE ,  GUICHARD JIM ,  RASZUK ROBERT ,  VASSEUR JEAN-PHILIPPE

IPC: H04L1/00

公开(公告)号：AT498263T

公开(公告)日：2011-02-15

申请号：AT06738162

申请日：2006-03-14

Applicant: CISCO TECH INC

Inventor： FILSFILS CLARENCE ,  GUICHARD JIM ,  RASZUK ROBERT ,  VASSEUR JEAN-PHILIPPE

IPC: H04L12/56

Abstract: A fast reroute (FRR) technique is implemented at the edge of a computer network. If an edge device detects a node or link failure that prevents it from communicating with a neighboring routing domain, the edge device reroutes at least some data packets addressed to that domain to a backup edge device which, in turn, forwards the packets to the neighboring domain. The backup edge device is not permitted to reroute the packets a second time. According to the inventive technique, the edge device first identifies a group one or more possible backup edge devices and then selects at least one preferred backup edge device from the group. The edge device makes its selection based on the values of one or more metrics associated with the possible backup edge devices. The metrics are input to a novel selection algorithm that selects the preferred backup edge device(s) using a hierarchical selection process or a weighted-metric selection process, or some combination thereof.

公开(公告)号：AT466435T

公开(公告)日：2010-05-15

申请号：AT05849074

申请日：2005-11-17

Applicant: CISCO TECH INC

Inventor： VASSEUR JEAN-PHILIPPE ,  PREVIDI STEFANO

IPC: H04L12/56 ,  H04L45/50

Abstract: In one embodiment, a traffic engineering (TE) label switched path (LSP) is established between a head-end node in a local domain and a tail-end node in a remote domain. The TE-LSP spans one or more intervening domains located between the local domain and the remote domain. The head-end node sends a routing information request over the TE-LSP to a target node on the TE-LSP that is in the remote domain. The head end node receives routing information from the target node. The received routing information includes a list of address prefixes reachable by the target node. The head end node uses the received routing information to calculate routes reachable via the TE-LSP to the target node. The calculated routes have a next-hop interface set to be the TE-LSP. The calculated routes are inserted into a routing table of the head-end node.

公开(公告)号：CA2900075C

公开(公告)日：2021-02-16

申请号：CA2900075

申请日：2014-02-04

Applicant: CISCO TECH INC

Inventor： VASSEUR JEAN-PHILIPPE ,  MERMOUD GREGORY ,  DASGUPTA SUKRIT

IPC: H04L12/24 ,  H04L12/26

Abstract: In one embodiment, techniques are shown and described relating to learning machine based detection of abnormal network performance. In particular, in one embodiment, a border router receives a set of network properties x; and network performance metrics M; from a network management server (NMS), and then intercepts x; and M; transmitted from nodes in a computer network of the border router. As such, the border router may then build a regression function F based on x; and Mi, and can detect one or more anomalies in the intercepted x; and M; based on the regression function F. In another embodiment, the NMS, which instructed the border router, receives the detected anomalies from the border router.

公开(公告)号：CA2866885C

公开(公告)日：2017-05-16

申请号：CA2866885

申请日：2013-03-22

Applicant: CISCO TECH INC

Inventor： HUI JONATHAN W ,  VASSEUR JEAN-PHILIPPE ,  HONG WEI

IPC: H04L27/00 ,  H04L69/14 ,  H04L5/00

Abstract: In one embodiment, a transmitting device monitors transmission activity of each of a plurality of subcarriers in a communication network, and determines a set of unutilized subcarriers of the plurality of subcarriers. As such, the transmitting device may then transmit a data frame on one or more of the unutilized subcarriers to a receiving device while transmission activity is present on one or more utilized subcarriers within the network. In another embodiment, the transmitting device may also determine timing information associated with the transmission activity, and may correspondingly schedule the transmitting to optimize network performance based on the timing information.

公开(公告)号：CA2916185A1

公开(公告)日：2014-12-24

申请号：CA2916185

申请日：2014-06-19

Applicant: CISCO TECH INC

Inventor： HUI JONATHAN W ,  VASSEUR JEAN-PHILIPPE

IPC: H04L47/36

Abstract: In one embodiment, a sender in a shared-communication network determines whether a pending frame is low-latency or high-throughput, and sets a maximum transmission unit (MTU) of the pending frame as a first MTU in response to a low- latency frame and a longer second MTU in response to a high-throughput frame. In another embodiment, a receiver receives a data frame from a sender according to an MTU, and determines a trigger for adjusting the MTU based on latency requirements. In response to the trigger, the receiver sets an interrupt flag in a link-layer acknowledgment for the received data frame. In still another embodiment, a sender determines a pending low-latency data frame to send to a receiver operating according to an MTU, and sends a control message to the receiver to indicate the pending low- latency data frame and an adjusted MTU.