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24-port NWay Ethernet Switch User’s Guide
Switch Management Concepts
29
Base module. Consequently, values for MIB objects can be
retrieved from any SNMP-based network manager
software. In addition to the standard MIB-II, the Switch
also supports its own proprietary enterprise MIB as an
extended Management Information Base. These MIBs may
also be retrieved by specifying the MIB’s Object-Identity
(OID) at the network manager. MIB values can be either
read-only or read-write.
Read-only MIBs variables can be either constants that are
programmed into the Switch, or variables that change
while the Switch is in operation. Examples of read-only
constants are the number of ports and types of ports.
Examples of read-only variables are the statistics counters
such as the number of errors that have occurred, or how
many kilobytes of data have been received and forwarded
through a port.
Read-write MIBs are variables usually related to user-
customized configurations. Examples of these are the
Switch’s IP Address, Spanning Tree Algorithm parameters,
and port status.
If you use a third-party vendors’ SNMP software to manage
the Switch, a diskette listing the Switch’s propriety
enterprise MIBs can be obtained by request. If your
software provides functions to browse or modify MIBs, you
can also get the MIB values and change them (if the MIBs’
attributes permit the write operation). This process
however can be quite involved, since you must know the
MIB OIDs and retrieve them one by one.