Chapter 45 System

•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.

45.10.1Supported MIBs

The ZyWALL supports MIB II that is defined in RFC-1213 and RFC-1215. The ZyWALL also supports private MIBs (zywall.mib and zyxel-zywall-ZLD- Common.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 ZyWALL’s MIBs from www.zyxel.com.

45.10.2 SNMP Traps

The ZyWALL will send traps to the SNMP manager when any one of the following events occurs.

Table 224 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 ZyWALL 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.

 

 

 

45.10.3 Configuring SNMP

To change your ZyWALL’s SNMP settings, click Configuration > System > SNMP tab. The screen appears as shown. Use this screen to configure your SNMP

 

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ZyWALL USG 50 User’s Guide