Chapter 18 SNMP
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The managed devices contain object variables/managed objects that define each
piece of information to be collected about the device. Examples of variables
include number of packets received, node port status and so on. A Management
Information Base (MIB) is a collection of managed objects. SNMP allows a
manager and agents to communicate for the purpose of accessing these objects.
SNMP itself is a simple request/response protocol based on the manager/agent
model. The manager issues a request and the agent returns responses using the
following protocol operations:
18.1.1 Supported MIBs
MIBs let administrators collect statistics and monitor status and performance.
The Switch supports the following MIBs:
• RFC 1213 SNMP MIB II
• MIB II - System
• MIB II - Interface
• RFC 1398 MIB - Ether-like
• RFC 2674 SNMPv2, SNMPv2c
• RFC 2819 RMON
• Group 1 (Statistics)
• Group 2 (History)
• Group 3 (Alarm)
•Group 9 (Event)
Table 38 SNMP Commands
COMMAND DESCRIPTION
Get Allows the manager to retrieve an object variable from the agent.
GetNext Allows the manager to retrieve the next object variable from a table or list
within an agent. In SNMPv1, when a manager wants to retrieve all
elements of a table from an agent, it initiates a Get operation, followed by a
series of GetNext operations.
Set Allows the manager to set values for object variables within an agent.
Trap Used by the agent to inform the manager of some events.
