User manual

Chapter 15 Configuring SNMP 67
About SNMP and the Device Server Agent
This section introduces SNMP and network management in TCP/IP
networks and it describes the device server agent. It discusses the
following:
• Network management components
• SNMP agent
• SNMP traps
• MIB support of the device server agent
• Support traps of the device server agent
Network Management Components
The TCP/IP network management architecture contains the following
components:
• Managed nodes such as host systems, routers, terminal and com-
munications servers (such as device server) and other network
devices
• One or more network managers (also called network management
stations), which are the points from which the network is managed
• Agents that reside on managed nodes and retrieve management
information and communicate this information to network managers
• The network management protocol, SNMP, which governs the
exchange of information between the nodes and stations
• Management information, which is the database of information
about managed objects. This database is called the management
information base (MIB).
SNMP Management Agent
Each managed node contains at least one agent—a component that
responds to requests from the network manager—that retrieves network
management information from its node and notifies the manager when
significant events occur.
SNMP Traps
A mechanism defined by SNMP is called a trap, which is a report or “alarm”
from a managed node to an SNMP manager that a significant event has
occurred.
MIB Support
The agent supports the following MIBs:
• Read-write for MIB II (RFC 1213), which is an Internet-standard
MIB, consisting of managed objects from the systems, interfaces, IP,
ICMP, TCP, UDP, transmission, and SNMP group
Chapter 15
Configuring SNMP