28
6.
Polling Interval - Time between a successful connection with a SNTP
server and a new attempt to connect to an SNTP server.
7.
Retry Count - The number of times the DSL600EU will try to connect to
an SNTP server before it try to connect to the next server in line.
8.
Time Zone - The time zone of the DSL600EU.
9.
Day Light - Check/uncheck this option to enable/disable day light
saving. See Fig 1-21.
Figure 1-21: SNTP
5.5.9
SNMP
SNMP (Simple Network Management Protocol) is a troubleshooting and
management protocol, which uses the UDP protocol on port 161 to
communicate between clients and servers. SNMP uses a manager MIB
(management information base) agent solution to fulfill the network
management needs. The agent is a separate station that can request data
from an SNMP agent in each of the different managed system in the network.
The agent uses the MIBs as dictionaries of manageable objects. Each SNMP-
managed device has at least one agent that can respond to the queries from
the NMS. The SNMP agent supports GETS, SETS, and TRAPS for 4 groups
with MIB-II: System, Interface, IP, and ICMP. The SNMP agent supports
three-community names authentication. See Fig 22.
