3Com LANPLEX 2500, User Manual

Page: 171 / 186

13-4 C
HAPTER
13: R
EMOTE
M
ONITORING
(RMON) T
ECHNOLOGY
Figure 13-1 Embedded RMON Implemented on the LANplex System
Management
Information Base
(MIB)
A MIB is a structured set of data that describes the way the network is
functioning. The management software, known as the
agent , gains access to
this set of data and extracts the information it needs. The agent can also
store data in the MIB.
The organization of a MIB allows a Simple Network Management Protocol
(SNMP) network management package such as the Transcend Enterprise
Manager application suite to manage a network device without a specific
description of that device. 3Com ships SNMP MIB files with LANplex
Extended Switching System software as ASN.1 files.
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 13-2 for the counter object.
LANplex ® 2500 system with embedded RMON probe
Ethernet ports
Fast Ethernet ports
LAN
Management
console
File Servers