Hitachi, Ltd.

Hitachi Microcomputer Engineering, Ltd.

Kohsuke Shinnai

Michio Suzuki

Ryoichi Sasaki

Tsutomu Nakamura

Yasuhiro Tanaka

Yasuhiko Nagai

Masato Saito

Takashi Kagei

Tomoaki Tsunoda

Goro Ikeba

Nobuhiko Ido

In a network management system, information items respectively of connection relationships, containment relationships, and display priority of a plurality of managed object instances (resources) are stored in a memory. According to a predetermined algorithm, there is calculated an evaluated value for display for each of the instances depending on the containment relationship information and display priority to select a limited number of instances representable on a screen. Displayed on the screen is a network layout diagram including icons representing the plural instances thus selected. When the user specifies one of the icons, the specified instance and a number of representable instances selected according to the evaluated values from a group of instances under the specified instance in the containment relationships are displayed in a new network layout diagram on the screen. When a fault occurs in either one of the instances, if an icon of the faulty instance is being displayed on the screen, the color thereof is changed into a second color. If the icon is not displayed on the screen, the color of icons being displayed for instances as high-ranking resources with respect to the faulty instance in the containment relationships is changed into a third color.

Network management system and network status display method

A network management system prepares an optimum configuration table corresponding to a failure of a transit trunk and distributes the same to each TDM, and thereby the optimization of reconfiguration of a high-speed digital network is enabled. User data are transmitted and received in accordance with route information table defined beforehand in each TDM. On the other hand, network management information is sent to all trunks other than a receiving trunk for the managing information when flooding is designated by the network management system. Accordingly, the management information can be sent without fail if any route to the TDM to be supplied with the management information exists. When source-routing is designated, the communications of the managing information can be implemented efficiently, since the route is set by the management information. Moreover, each packet exchanger provides route identifiers defined individually for correspondence to local trunks, and transit route information set in each packet is recorded by using the route identifiers of each packet exchanger. Route information determined in the flooding process is then used in subsequent source-routed communications.

Network control method and apparatus therefor

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Machida, Japan

Kohsuke Shinnai