CANOGA PERKINS CanogaOS Configuration Guide - Manual (Page 342)

CanogaOS Configuration Guide
Proprietary & Confidential Canoga Perkins Metro Ethernet Switches Page 342 of 350
47 Configuring SNMP
SNMP is an application-layer protocol that provides a message format for communication
between managers and agents. The SNMP system consists of an SNMP manager, an SNMP
agent, and a MIB. The SNMP manager can be part of a network management system (NMS).
The agent and MIB reside on the switch. To configure SNMP on the switch, you define the
relationship between the manager and the agent. The SNMP agent contains MIB variables whose
values the SNMP manager can request or change. A manager can get a value from an agent or
store a value into the agent. The agent gathers data from the MIB, the repository for information
about device parameters and network data. The agent can also respond to a manager’s requests to
get or set data. An agent can send unsolicited traps to the manager. Traps are messages alerting
the SNMP manager to a condition on the network. Traps can mean improper user authentication,
restarts, link status (up or down), MAC address tracking, closing of a Transmission Control
Protocol (TCP) connection, loss of connection to a neighbor, or other significant events.
47.1.1 References
SNMP module is based on the following RFC draft:
SNMPv1—Defined in RFC 1157.
SNMPv2C—Defined in RFC 1901.
SNMPv3—Defined in RFC 2273 to 2275.
47.1.2 Terminology
Following is a brief description of terms and concepts used to describe the SNMP protocol:
Agent
A network-management software module, an agent has local knowledge of management
information and translates that information into a form compatible with SNMP.
Management Information Base (MIB)
Management Information Base, collection of information is organized hierarchically.
Engine ID
A unique ID for a network’s node
Trap
Used by managed devices to asynchronously report events to the NMS.