Specifications

Chapter 1 - Getting Started Administration Manual (SIP/MGCP Version)
AT-VP504E FXS 7
variety of transport protocols could be used, UDP is normally
used with SNMP.
SNMP
Messages
SNMP defines only five types of messages that are exchanged
between the manager and agent.
The first three messages are sent from the manager to the agent, and
the last two are from the agent to the manager.
What is a MIB? A Management Information Base (MIB) specifies what variables the
network elements maintain (the information that can be queried and set
by the manager). All variables are identified by object identifiers, a
hierarchical naming scheme consisting of long strings of numbers that
are normally abbreviated into a simple name, for human readability.
A MIB is structured like a tree. At the top of the tree is the most general
information available about a network. Each branch of the tree then
gets more detailed into a specific network area, with the leaves of the
tree as specific as the MIB can get.
Table 4: SNMP Message Types
Operator Description
get-request Fetch the value of one or more variables.
get-next-
request
Fetch the next variable after one or more specified
variables.
set-request Set the value of one or more variables.
get-response Return the value of one or more variables. This is the
message returned by the agent to the manager in
response to the get-request, get-next-request, and
set-request operators.
trap Notify the manager when something happens on the
agent.