ZyXEL Communications ES-1528 - V1.12, User Manual, Page: 106 / 170

Chapter 18 SNMP
ES-1528 User’s Guide
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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 1157 SNMP v1
• RFC 1155 SMI
• RFC 2674 SNMPv2, SNMPv2c
• RFC 2819 RMON
• Group 1 (Statistics)
• Group 2 (History)
• Group 3 (Alarm)
• Gropu 4 (Event)
18.1.2 SNMP v3 and Authentication
SNMP v3 adds the use of groups and users to enhance security for SNMP management.
Groups are assigned access rights to SNMP objects. Users are members of groups and are
therefore limited to the access rights the group has. In addition users can also be required to
authenticate before conducting SNMP management sessions.
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SNMP v3 is enabled by creating SNMP groups and users. Once SNMP v3 is
enabled, SNMP community should be configured for SNMP v1 and/or v2c
access.
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.