ZyXEL Communications P-334W User Manual

Prestige 334W User’s Guide 

Remote Management Screens 

 

14-9 

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 Prestige supports MIB II that is defined in RFC-1213 and RFC-1215. The focus of the MIBs is to let 
administrators collect statistical data and monitor status and performance. 

The Prestige will send traps to the SNMP manager when any one of the following events occurs: 

0 

coldStart (defined in RFC-1215) 

A trap is sent after booting (power on). 

1 

warmStart (defined in RFC-1215)  A trap is sent after booting (software reboot). 

4 

authenticationFailure (defined in 
RFC-1215) 

A trap is sent to the manager when receiving any SNMP 
get or set requirements with the wrong community 
(password). 

6 

whyReboot (defined in ZYXEL-
MIB) 

A trap is sent with the reason of restart before rebooting 
when the system is going to restart (warm start). 

6a 

For intentional reboot : 

A trap is sent with the message "System reboot by user!" 
if reboot is done intentionally, (for example, download new 
files, CI command "sys reboot", etc.). 

6b 

For fatal error :  

A trap is sent with the message of the fatal code if the 
system reboots because of fatal errors.