Understanding SNMP
StorageTek’s L-series library embedded agents support Version 1 of the Simple Network Management Protocol (SNMP) standard (SNMPv1). SNMP is an application layer protocol that performs network management operations over an Ethernet connection using a User Datagram Protocol (UDP/IP).
SNMP allows systems administrators to query the library for configuration, operation, and statistical information. SNMP also allows the library to inform the systems administrator of potential problems.
System administrators and network managers use SNMP to monitor and receive status from the library, such as:
< Operational state of the library (microcode level, serial number, online, ready)
< Status of the cartridge access port (open or closed, number of cells)
< Library elements (number of hands, columns, panels, cells, CAPs)
< Number of storage cells and media types stored in the library
< Number and types of tape drives installed in the library
< Plus many other variables defined in the database (MIB)
The following figure shows an example of simple network block diagram that identifies the locations of the SNMP software application, DNS servers, and Library Administrator. This figure also identifies the IP addresses, shows a map of DNS names, and other components involved in that configuration (such as the operator panel, Ethernet connections, location of the MIB, and the processor card).
1. Ethernet connection (ENET) for the library.
2. To configure the library to support DNS or library name, see the Library network parameters topic.
Note: You must enter the Domain Name Service (DNS) or the library name only if your SNMP agent is set to trap named recipients; if SNMP is set for numbered recipients (by using IP addresses), no entries are required.
3. An example of a table that matches IP addresses to selected DNS or library names.
4. SNMP software application that implements the role of manager. Some applications include:
- HP O pen View
- IBM NetView
- Sun Microsystems SunNet Manager
5. The MIB is stored on the MPC card (for Lxxx libraries) and the LLC card (for the Lxx libraries). To view the contents of the MIB database in this example, point your browser to: http://129.80.1.4/Lseries.mib or http://Library/Lseries.mib
6. Library Admin is an optional feature for the library. It provides a GUI-based monitoring system and is separate from the SNMP application. Library Admin provides an easy and convenient way to configure the library SNMP agent using a network configuration panel or screen. Library Admin also provides other beneficial functions and display screens for the library.
See the Configuring the Network topic for information on configuring the library to support SNMP configure using the Library Administrator.
See the Setting Up SNMP Agents and Setting up SNMP Recipients topics for information on configuring the library to support SNMP.