ZyXEL Communications 200 Series User Manual
Chapter 43 System
ZyWALL USG 100/200 Series User’s Guide
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An agent is a management software module that resides in a managed device (the ZyWALL).
An agent translates the local management information from the managed device into a form
compatible with SNMP. The manager is the console through which network administrators
perform network management functions. It executes applications that control and monitor
managed devices.
An agent translates the local management information from the managed device into a form
compatible with SNMP. The manager is the console through which network administrators
perform network management functions. It executes applications that control and monitor
managed devices.
The managed devices contain object variables/managed objects that define each piece of
information to be collected about a device. Examples of variables include such as number of
packets received, node port status etc. 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.
information to be collected about a device. Examples of variables include such as number of
packets received, node port status etc. 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:
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.
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.
43.10.1 Supported 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.
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.
43.10.2 SNMP Traps
The ZyWALL will send traps to the SNMP manager when any one of the following events
occurs.
occurs.
Table 243 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.
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.
non-authenticated hosts.