RAD Data comm LRS-24 - Manual (Page 98)

Appendix C SNMP Management LRS-24 Installation and Operation Manual
C-4 IP Environment
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.
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