LRS-24Installation and Operation Manual

Chapter 4 Management via the CM-2 Module

 

 

Identification of Failures – automatically identifies failure of the management communication, and enables alternate management modes, in accordance with the following priorities:

Network management stations

Supervision terminal

For a module without internal SNMP agent–allows remote configuration in accordance with the parameters of the remote module connected in a link with the LRS-24 module.

When communication with a management function with higher priority is restored, the management capabilities are automatically returned to it.

Routing – routes the management traffic received through the various ports to its intended destination (module), and processes the messages received from the modules for transmission through the appropriate management port.

Format – automatically translates the format of the incoming and outgoing messages to the internal management protocols used by various modules. Moreover, when simultaneous access is attempted, the CM-2 module arbitrates handling management requests according to a built-in system of priorities.

Manages Hub Functions manages the general hub functions (for example, power supplies).

Data Storage stores LRS-24 configuration data in non-volatile memory.

Handling of Management Communication

The services provided by the CM-2 module depend on the type of management communication (ASCII terminal, network management station, or remote module) and the type of modules (with or without internal SNMP agent) which are addressed by the external management function.

Internal handling of the SNMP management communication is as follows:

Modules with Internal SNMP Agent the internal protocol is SNMP over SLIP. (However such modules also include management software for directly operating an ASCII terminal).

Routing of SNMP messages is made in accordance with IP addresses assigned to the various modules by the CM-2 module, which provides their initialization parameters.

Refer to Appendix C for additional information.

Terminal messages are routed directly to the addressed module. After the addressed module starts communicating with the terminal, it takes control and the terminal then operates under direct control of that module.

Modules without Internal SNMP Agent a proprietary protocol is used for internal management communication. SNMP messages are accepted through the dedicated management (Ethernet) interface, are converted to the proprietary protocol, and routed to the slot with the desired module. The CM-2 module serves as a proxy agent for these modules.

Introduction 4-3

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RAD Data comm LRS-24 operation manual Handling of Management Communication