E
-
2
A
P
P
E
N
D
I
X
E:
RMON
A
N
D
A
D
V
A
N
C
E
D
M
A
N
A
G
E
M
E
N
T
DUA1663-0BAA03
Benefits of RMON
Traditional network management involves a network management
console polling network devices (e.g. hubs, bridges, routers) at regular
intervals to gather statistics and identify problems or trends. As
network sizes and traffic levels grow, however, this approach places a
strain on the network management console which may not be able to
keep up. It also generates a lot of network management traffic which
itself adds to the problems.
An RMON probe, on the other hand, autonomously looks at the
network on behalf of the network management console without in any
way affecting the characteristics and performance of the network. An
important characteristic of RMON is that it reports by exception. The
traditional approach involves the constant interrogation of network
devices just to find out if the network is within its normal operating
conditions. RMON informs the network management console directly
when the network has entered an abnormal state. The console can
then use more information from the probe (such as history information
and packet capture) to perform additional diagnoses.
3Com Transcend RMON SmartAgents
However, RMON does require one probe per LAN segment (segments
are separated by bridges or routers) and standalone RMON probes
have traditionally been expensive.
Therefore, 3Com’s approach has been to build an inexpensive RMON
probe into the Transcend SmartAgent in each hub device. This allows
RMON to be widely deployed around the network without costing
more than traditional network management.
One other problem with standalone RMON probes is that they are
passive, able to monitor and report but nothing more. Placing probe
functionality inside the network device allows integration of RMON
with normal device management to allow proactive management. For
example, statistics can be related to individual hub ports and the hub
can take autonomous actions such as disabling a port (temporarily or
permanently) if errors on that port exceed a pre-defined threshold.
Summary of Contents for 3C16630A
Page 80: ...3 52 CHAPTER 3 USING THE VT100 MANAGEMENT INTERFACE DUA1663 0BAA03...
Page 88: ...A 8 APPENDIX A TECHNICAL INFORMATION CABLE PIN OUTS AND PROTOCOLS DUA1663 0BAA03...
Page 94: ...B 6 APPENDIX B TECHNICAL SUPPORT DUA1663 0BAA03...
Page 98: ...C 4 APPENDIX C TROUBLESHOOTING DUA1663 0BAA03...
Page 122: ...F 8 APPENDIX F INDEX OF MANAGEMENT ACTIONS AND DATA DUA1663 0BAA03...
Page 128: ...6...
Page 130: ...ELECTRO MAGNETIC COMPATABILITY STATEMENT DUA1663 0BAA03alpha...
