User Manual

SGD-SB2025NT-TUM, Part 2
Jan 12 Page 100 SNMP
14 SNMP
14.1 O VERVIEW O F SNMP I N S OLAR
This section details the setting up necessary to implement the SNMP facility and the functions that
are available through it. However, it does not go into any detail of SNMP operation, as it is
assumed the user will already have knowledge of and be familiar with SNMP. This feature is a
‘Facility Key’ enabled option which requires the Solar 2 ET and MIB file ‘DALMAN-SOLAR-MIB-
011.txt’ or higher.
SNMP is a defined standard for the data transfer between networks to be monitored and network
management systems. The use of SNMP will allow the user to monitor and control a Solar network
as well as providing indications of the operational status of the Solar network all in a manner that
suits the particular needs of the user.
To make use of the SNMP facility, the user is required to provide a NMS. There are many
commercially available NMS software packages to choose from or perhaps the user has an
existing NMS, therefore, it might be preferable to simply add the Solar SNMP to the existing NMS.
The SNMP implementation in the TM is SNMPv2 and a MIB is provided to define the data and data
structure of the information that is necessary for the NMS to operate into Solar. Certain objects
have Object Identifiers (OIDs) defined in the standard mib-2; these include the “sysDescription”,
“sysContact”, “sysName”, “sysLocation” strings and “sysUpTime”. Also defined in mib-2 are the
“Coldstart” and “Warmstart” traps sent when the TM starts up.
The SNMP facility does not replace the requirement for using the ET, since the basic configuration
of a Solar network must be undertaken using the ET before the SNMP facility itself can be realised.
Thereafter, although some of the parameters of the Solar network equipment can be accessed and
altered through SNMP, the majority can only be accessed using the ET.
14.2 C ONFIGURING SNMP I N T HE TM
As long as the ‘Facility Key’ has the SNMP feature enabled, the ‘SNMP’ table of entries will be
enabled on the ‘Facility’ page of ‘TM Engineering’.
The SNMP setup information is presented under two pages: ‘Communities’ and ‘Destinations’. The
default text settings in ‘SNMP Communities’ and ‘System’ must all be changed to suit and the
appropriate IP addresses entered in ‘Destinations’.
14.2.1 SNMP Communities and System
All these entries are simple text strings but, as the purpose of those in the ‘Communities’ area is
similar to that of password access, the default settings for ‘Read Only’, ‘Read-Write’ and ‘Trap’
should be changed to protect the Solar network from unauthorised access. The ‘System’ values
are used to provide information about the monitored network. These can also be changed as
required, perhaps to make this network more readily identifiable as a Solar network if the NMS is
monitoring several networks.
To change any of the text strings, depress the ‘Eng’ button then select the item to be changed and
edit the existing string or enter a new text string as appropriate. To complete the change, the
‘Apply’ button must be selected which will automatically release the ‘Eng’ button.