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Avaya P460 Configuration Guide 67
Chapter 6
Switch Monitoring Features
SNMP Configuration
SNMP Configuration Overview
Managers and Agents
SNMP uses software entities called managers and agents to manage network
devices:
The manager monitors and controls all other SNMP-managed devices or network
nodes on the network. There must be at least one SNMP Manager in a managed
network. The manager is installed on a workstation located on the network.
An agent resides in a managed device or network node. The agent receives
instructions from the SNMP Manager, and also sends management information
back to the SNMP Manager as events occur. The agent can reside on:
•Routers
•Bridges
•Hubs
•Workstations
•Printers
or other network devices.
There are many SNMP management applications, but all these applications perform
the same basic task. They allow SNMP managers to communicate with agents to get
statistics and receive alerts from the network devices. You can use any SNMP-
compatible network management system to monitor and control an Avaya P460.
Manager/Agent Communication
There are several ways that the SNMP manager and the agent communicate.
The manager can:
• Retrieve a value – a get action
The SNMP manager requests information from the agent, such as the number of
users logged on to the agent device, or the status of a critical process on that
device. The agent gets the value of the requested MIB variable and sends the
value back to the manager.
• Retrieve the value immediately after the variable you name – a get-next action).
The SNMP manager retrieves values from within a MIB. Using the get-next