Global protocols, Snmp – HP Systems Insight Manager User Manual
Page 502
Related procedure
▲
Related topics
•
•
•
Global protocols
Managing a network is complex, and network management becomes even more complicated without
standards. When an organization purchases multiple management tools, each with a different method of
managing a particular hardware or software product, it must maintain and train network administrators in
different tools. This process is both expensive and inefficient. To address this issue, standards committees
have developed protocols for network management.
HP Systems Insight Manager (HP SIM) takes advantage of many different management protocol standards.
This capability enables HP SIM to provide management support for a wide array of manageable devices.
SNMP
The Internet Engineering Task Force (IETF), the standards-rating body for the worldwide Internet, has defined
a management protocol,
, which has accumulated a major share of the market and has the support
of over 20,000 different products. SNMP has its roots in the Internet community. The complexity of large
international TCP/IP networks has provided the necessary incentive to develop a standard method of managing
devices on the network.
Within the SNMP framework, manageable network devices (routers, bridges, servers, and so on) contain a
software component called a management agent. The agent monitors the various subsystems of the network
element and stores this information in a
(MIB). The agents enable the device
to generate traps, which can be configured to be sent to a trap destination server that is running HP SIM.
Conceptually, the MIB is a database that can be written to and read by a management application using
the SNMP protocol. There are two types of MIBs:
•
Internet Management MIBs.
These MIBs, standardized by the Internet community, include MIB-II,
Remote Monitoring (RMON), and others and represent the core objects that are common across the
widest range of network devices implementing the Internet protocols. Examples of these objects include
network protocols such as TCP/IP and network systems such as Ethernet network interfaces.
•
Vendor MIBs.
These MIBs represent objects that are unique to an individual vendor's product or
product line. Over 500 vendors and organizations have created their own vendor MIBs. HP was the
first personal computer company to develop a MIB-enabled SNMP management of system hardware.
SNMP supports both read and write (GET and SET) commands on attributes. Some vendors do not support
the SET command because of the potential to allow an unauthorized person to alter critical parameters on
a network element. HP SIM primarily only uses the SNMP GET command.
SNMP is associated with TCP/IP and used for monitoring systems on Ethernet networks because of its long
association with the Internet.
Since its inception, SNMP itself has undergone several updates, including SNMP V2c and SNMP V3. HP
SIM supports the original V1-compliant agents and the compilation of V1 and V2 MIBs. SNMP uses UDP
port 161 for monitoring systems, while traps are received on port 162.
If your CMS is an HP-UX or Linux system, HP SIM might need to co-exist with other applications using port
162. To accomplish this, use the following procedure to assign HP SIM to use a different port.
1.
Open the globalsettings.props file located at
/etc/opt/mx/config/globalsettings.props.
2.
Locate the SnmpTrapPortAddress property: SnmpTrapPortAddress=162 .
3.
Modify this property by changing the port value to a different port number.
4.
Restart HP SIM.
502 Administering systems and events