User`s guide

PassFinder AP2520 VoIP Router/Gateway Operation Manual Version 1.10 / Mar. 2002
AddPac Technology Co., Ltd. -
137 -
The SNMP Agent collects data from the MIB that manages data or
equipment parameters for the routing function. According to the request of
the SNMP Manager, the SNMP Agent gives or sets these data. However, if
the SNMP Agent sends information without receiving any request from the
SNMP Manager, it is called “Trap.” Usually, trap is a warning message. A
warning message is created upon fault occurrence in the network,
configuration change or important event occurrence.
[Figure 3. Communication between SNMP Manager and SNMP Agent] shows
the relations between the SNMP Agent and the SNMP Manager. The SNMP
Manager sends requests to get or set MIB values to the SNMP Agent, and the
SNMP Agent sends responses. Also, the SNMP Agent sends trap for
important network events that the manager should know.
SNMP standards are as follows:
z SNMPv1: Full standard protocol defined in RFC1157
z SNMPv2C: Consisting of followings.
9 SNMPv2: SNMP v2 protocol defined in RFC 1902~1907. An Internet
draft standard
9 SNMPv2C: Standard defined in RFC 1901. Community-based
management structure of SNMPv2
The PassFinder AP2520 Gateway supports both of SNMPv1 and SNMPv2C.