ZyXEL Communications NXC8160 User Manual

Chapter 6 Advanced Screen

NXC-8160 User’s Guide

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.
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.

The NXC-8160 can send the following traps to the SNMP manager.

Click Advanced to display the screen as shown.

Table 20   SNMP Traps

Configured and connected APs of 

channel [<channel number>] 

This trap is sent when an AP is disconnected or connected 

from/to the WLAN controller.

AP <ap number in hex base> has 

been connected 

This trap is sent when an AP is connected to the WLAN 

controller.

AP <ap number in hex base> has 

been disconnected 

This trap is sent when an AP is disconnected from the WLAN 

controller.

Reference Host is up

This trap is sent when the referenced host is up.

Reference Host is down

This trap is sent when the referenced host is down.

Standby Switch is up 

This trap is sent when the backup WLAN controller is up.

Standby Switch is down

This trap is sent when the backup WLAN controller is down.

Inactive - Reference Host is down

This trap is sent when the referenced host is down and the main 

WLAN controller becomes inactive.

Inactive Standby Switch - Main 

Switch is up

This trap is sent when the backup WLAN controller is deactived 

because the main WLAN controller becomes active.

Main Switch is active again

This trap is sent when the main WLAN controller becomes 

active again.

Failure detected in Main Switch - 

Switching Over

This trap is sent when the main WLAN controller is down and 

then the backup WLAN controller is enabled.