User guide

Chapter 4: Managing Units 109
a. Type an address in the Primary NTP Server Address and optionally, the Secondary NTP
Server Address field. The primary address is required if NTP is being enabled for the
first time.
b. Select or type the frequency for time updating in the Update Interval (hours) field. The
valid range is 0-99 hours. A zero value indicates that the time should be requested and the
clock updated when the CCM appliance reboots.
The NTP Status section will indicate that an update was attempted, not attempted, or is
in progress.
6. Click Save and then click Close.
Changing managed appliance SNMP settings
NOTE: This procedure is valid for the following managed appliances: DS1800 digital switches, CPS appliances,
CCM appliances and DSR switches.
The SNMP protocol is used to communicate management information between network
management applications and DSView software managed appliances using TCP/IP and IPX
protocols. Other external SNMP managers (such as Tivoli
®
and HP OpenView) may communicate
with your managed appliances by accessing MIB-II (Management Information Base) and the
public portion of the enterprise MIB. MIB-II is a standard MIB that many SNMP target devices
support. The managed appliances will send their traps directly to the external SNMP manager in
addition to sending it to the server.
The following settings appear beneath SNMP in the side navigation bar:
• System - Enables/disables SNMP
• Managers - Stations that may manage the managed appliance
• Community - Communities to which the traps belong
• Destinations - Stations that may receive SNMP traps
• Traps - Available traps and enabled/disabled traps
When you enable SNMP, the managed appliance will log SNMP received messages over UDP
(User Datagram Protocol) port 161. UDP port 162 is used to listen for incoming traps.
The traps must be configured on each managed appliance using the Command Line Interface (CLI).
The address of the server running the DSView management software must be configured as a trap
recipient, the proper community must be set and each desired trap must be enabled.
All SNMP traps are logged in the event log file. See Event Logs on page 275 for more information.
To enable or disable SNMP system settings for a managed appliance:
1. Click Units in the tab bar.
2. Click Appliances in the side navigation bar. The Unit Views - Appliances - All window
will open.
3. Click on the appliance name.