ATL Telecom R1-SW Ethernet Switch - Manual (Page 138)

R1-SW24L2B User’s Manual
8-4
SNMP Messages
The SNMP manger and SNMP agent use the following SNMP messages to request information
or configuration changes, respond to requests, and send unsolicited alerts.
y Get-Request / Get-Response Message
y GetNext-Request / GetNext-Request Message
y Set-Request Message
y Trap Message
Get-Request Message
Get-Request Message is the basic SNMP request message. Sent by an SNMP manager, it
requests information about a single MIB entry on an SNMP agent. For example, the amount of
free drive space.
GetNext-Request Message
GetNext-Request Message is an extended type of request message that can be used to browse
the entire tree of management objects. When processing a Get-next request for a particular
object, the agent returns the identity and value of the object which logically follows the object
from the request. The Get-next request is useful for dynamic tables, such as an internal IP route
table.
Set-Request Message
If write access is permitted, Set-Request message can be used to send and assign an updated
MIB value to the agent.
Trap Message
An unsolicited message sent by an SNMP agent to an SNMP manager when the agent detects
that a certain type of event has occurred locally on the managed device. For example, a trap
message might be sent on a system restart event.