Cisco ONS 15600 Reference Manual page 265

Chapter 13 SNMP
A network might be managed by one or several management systems. A management system such as HP
OpenView executes monitoring applications and controls managed devices. Management systems
execute most of the management processes and provide the bulk of memory resources used for network
management.
the managed devices.
Figure 13-2
Management
An agent (such as SNMP) residing on each managed device translates local management information
data—such as performance information or event and error information—caught in software traps, into a
readable form for the management system.
transport data to the network management software.
Figure 13-3
NMS
SNMP Manager
The SNMP agent captures data from MIBs, which are device parameter and network data repositories,
or from error or change traps.
Figure 13-2 illustrates the relationship between the network manager, SNMP agent, and
Example of the Primary SNMP Components
Management
NMS
Agent
Management
Database
Managed Devices
Agent Gathering Data from a MIB and Sending Traps to the Manager
get, get-next, get-bulk
get-response, traps
Entity
Agent
Management
Database
Figure 13-3 illustrates SNMP agent get-requests that
Network device
MIB
SNMP Agent
Cisco ONS 15600 Reference Manual, R8.0
13.2 Basic SNMP Components
Agent
Database
13-3