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B-10 APPENDIX B: REMOTE MONITORING (RMON) TECHNOLOGY
MIB Objects The data in the MIB consists of objects that represent features of the
equipment that an agent can control and manage. Examples of objects
in the MIB include a port that you can enable or disable and a counter
that you can read.
A counter is a common type of MIB object used by RMON. A counter object
might record the number of frames transmitted onto the network. The MIB
might contain an entry for the counter object something like the one in
Figure B-3 for the counter object.
Figure B-3 Example of an RMON MIB Counter Object
The displayed information includes these items:
■ The formal name of the counter is etherStatsPkts (Ethernet, Statistics,
Packets.)
■ The access is read-only.
■ The number of the counter’s column in the table: 5.
The name of the table in which the counter resides is 3CometherStatTable,
although this name does not appear in the display.
You do not need to know the contents of every MIB object to manage a
network. Most network management applications, including Transcend
Enterprise Manager Software, make the MIB transparent. However, knowing
how different management features are derived from the MIB allows you to
better understand how to use the information that they provide.
etherStatsPkts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
This is a total number of packets
received, including bad packets,
broadcast packets, and multicast
packets.
::= { etherStatsEntry 5 }