
SNMP, BootP, BootP/DHCP Relay, and DHCP Server Concepts
308644-15.1 Rev 00
2-3
The management station issues three types of SNMP messages to retrieve single
or multiple object variables:
• GetRequest messages
• GetNextRequest messages
• SetRequest messages
The agent acknowledges all three types of messages by passing a GetResponse
message to the management application. In addition, an agent may issue a trap to
the network management station to identify a condition, such as a threshold that
exceeds a predefined value.
Figure 2-1. Role of SNMP
SNMP manager
UDP
IP
Network-dependent protocols
GetRequest
GetNextRequest
SetRequest
GetResponse
Tra p
SNMP agent
UDP
IP
Network-dependent protocols
GetRequest
GetNextRequest
SetRequest
GetResponse
Tra p
Management application
SNMP managed objects
Managed resources
Network or
internetwork
SNMP management station SNMP agent
Application
manages objects
SNMP messages
SNM00012A
Comentarios a estos manuales