Appendix C SNMP Management

LRS-24Installation and Operation Manual

 

 

CM-2 Communities

The SNMP agent of the CM-2 can use and recognize the following community types:

Read-only

SNMP community that has read-only authorization, i.e., the SNMP agent

 

will accept only getRequest and getNextRequest commands from

 

management stations using that community.

 

The default read-only community for RAD network management stations

 

is Public.

Read-write

SNMP community that has read-write authorization, i.e., the SNMP agent

 

will also accept setRequest commands from management stations using

 

that community.

 

The default write community for RAD network management stations is

 

Public.

Trap

SNMP community to which the SNMP agent will send traps.

 

The default trap community for RAD network management stations is

 

Public.

C.3 IP Environment

General

The SNMP agent of the CM-2 can use its dedicated interface, located on its interface module (LRSI-F1-CM2 or LRSI-F2-CM2), or the serial supervisory port on the CM-2 module.

In addition, the SNMP agent also handles some of the messages received from a supervision terminal, as explained in Chapters 1-3.

This section describes the IP environment, and the functions performed by the SNMP agent.

IP Environment

This section describes the IP environment, and the considerations related to the assignment of IP addresses.

IP Address Structure

Under the IP protocol, each IP network element (SNMP agents, network management stations, etc.) is called an IP host and must be assigned an IP address. This is also true for the Serial Port IP protocol (SLIP). The main difference with respect to the handling of messages is that to route an IP message to its destination it is also necessary to provide a MAC address, whereas for SLIP messages this is irrelevant, because the messages must reach a specific serial port.

An IP address is a 32-bit number, usually represented as four 8-bit bytes. Each byte represents a decimal number in the range of 0 through 255.

The address is given in decimal format, with the bytes separated by decimal points, i.e., 164.90.70.47. This format is called dotted quad notation.

C-4

IP Environment

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RAD Data comm LRS-24 operation manual IP Environment, CM-2 Communities, IP Address Structure