摘要:
To provide a device and a method enabling a user to judge which route a path used at the present traces without being aware of whether the now-in-use path is a working path or a recovery path. A relay device positioned at a diverging node between the working path and the recovery path, when forwarding a message (e.g., a Path message and a Resv message each containing RRO) used for route trace, judges which type of path the path employed for forwarding the data at the present is coincident with and forwards the data to the relay device disposed on the in-use path, thereby actualizing the trace of the route used for forwarding the data at the present.
摘要:
A layer-structured MPLS path is set up in a short time by using a minimum number of control messages. A relay apparatus acting as the start point of the highest-layer L2 path creates a label request message specifying the intermediate-point and end-point relay apparatuses for all the paths of all the layers, and transmits it to the end-point relay apparatus of the L2 path. At a relay apparatus permitted to use an already established L1 path, instead of requesting a label of the L1 path, the label of the already established path is inserted in the label request message. In response to the label request message, a label mapping message is transmitted and transferred to the start-point relay apparatus. With this message, each node determines the labels associated with it and transfers them to its adjacent relay apparatus.
摘要翻译:通过使用最少数量的控制消息,在短时间内建立层结构的MPLS路径。 作为最高层L 2路径的起始点的中继装置创建指定所有层的所有路径的中点和终点中继装置的标签请求消息,并将其发送到终点中继 L 2路径的装置。 在允许使用已经建立的L 1路径的中继设备上,不是请求L 1路径的标签,所以已经建立的路径的标签被插入到标签请求消息中。 响应于标签请求消息,标签映射消息被发送并传送到起始点中继装置。 利用该消息,每个节点确定与其相关联的标签并将它们传送到其相邻的中继设备。
摘要:
A method of setting up a backup path for a primary path on a network includes the steps of grouping nodes constituting the primary path into segments each including a plurality of nodes, and setting a backup path connecting between a head node and end node of each of the segments separately for each segment by notifying of information about segment position by a primary-path-provision requesting message.
摘要:
In a network-device control system for controlling a network device such as a router, which is located between a communication terminal employed by a user and a server with which the terminal communicates, at a priority that has been set in advance for the user or for an application, an event notification device detects that a user has logged in to the communication terminal or that the user has launched a predetermined application from the communication terminal and reports the user identifier or the application identifier to a network-device controller. The latter acquires user priority or application priority on the basis of the reported identifier and, in accordance with the priority, controls the router on the communication path between the communication terminal and the server.
摘要:
A communication node selecting unit selects a communication node where a time for transferring a failure notification message from a plurality of failure detected communication nodes which detect a plurality of failures on an active communication path to be protected is within a predetermined time, and a backup communication path designing unit searches, based on the selected communication nodes, for a common backup communication path which bypasses the failures.
摘要:
A transmission equipment decides in which, when a frame is received from each of networks, an output physical port corresponding to an output logical port decided by a path deciding section is decided by an output physical port deciding section, a transmitting frame is outputted to the output physical port, and when following received frames are successively transmitted, an output physical port number to which a transmitting frame is outputted by a port number increment section is incremented each time a frame is transmitted, and a destination to which a transmitting frame is outputted is switched among output physical ports.