Chapter 15 System

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:

•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.

15.9.1Supported MIBs

The NWA3000-N series AP supports MIB II that is defined in RFC-1213 and RFC- 1215. The NWA3000-N series AP also supports private MIBs (ZYXEL-ES- CAPWAP.MIB, ZYXEL-ES-COMMON.MIB, ZYXEL-ES-HYBRIDAP.MIB, ZYXEL-ES- PROWLAN.MIB, ZYXEL-ES-RFMGMT.MIB, ZYXEL-ES-SMI.MIB, and ZYXEL-ES- WIRELESS.MIB) to collect information about CPU and memory usage and VPN total throughput. The focus of the MIBs is to let administrators collect statistical data and monitor status and performance. You can download the NWA3000-N series AP’s MIBs from www.zyxel.com.

15.9.2 SNMP Traps

The NWA3000-N series AP will send traps to the SNMP manager when any one of the following events occurs.

Table 77 SNMP Traps

OBJECT LABEL

OBJECT ID

DESCRIPTION

Cold Start

1.3.6.1.6.3.1.1.5.1

This trap is sent when the NWA3000-N

 

 

series AP is turned on or an agent restarts.

 

 

 

linkDown

1.3.6.1.6.3.1.1.5.3

This trap is sent when the Ethernet link is

 

 

down.

 

 

 

linkUp

1.3.6.1.6.3.1.1.5.4

This trap is sent when the Ethernet link is

 

 

up.

 

 

 

authenticationFailure

1.3.6.1.6.3.1.1.5.5

This trap is sent when an SNMP request

 

 

comes from non-authenticated hosts.

 

 

 

218

 

NWA3000-N Series User’s Guide