3Com 3C16685 User Manual - page 125
RMON Features of the Dual Speed Hub 500
125
One other problem with stand-alone 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.
As an example, statistics can be related to the segments and the unit
can take autonomous actions such as disabling a port on a segment
(temporarily or permanently) if errors on that segment exceed a
pre-defined threshold.
RMON Features of the Dual Speed Hub 500
All nine groups of RMON are supported fully for 10Mbps and
100Mbps segments.
If you have a Dual Speed Hub 500 with a serial number less than
0600/00000000000, upgrading the software to version 2.1x or
above will not give you support for the RMON Filter and Capture
groups on the 100Mbps segments, which means that you cannot
perform RMON Filter Capture for the 100Mbps segments.
Table 11
details the RMON support provided by the unit.
Table 11 RMON Support Provided by the Unit
RMON Group
Support supplied by the unit
Statistics
One default session per segment. All segments and
counters are supported.
History
Two default sessions per segment:
■
30 second intervals, 120 historical samples stored
■
1800 second intervals, 96 historical samples stored
Alarms
No default sessions created. Maximum of 200 alarms per
unit.
Hosts
One session per segment. All segments supported.
Hosts Top N
No default sessions created.
Matrix
One session per segment. All segments supported.
Filter
No default sessions created. All segments supported.
Capture
No default sessions created. All segments supported.
Events
There are many default events. They are described in
“Default Events”
on
page 126
.