Rmon and your switch – 3Com 1100 User Manual
Page 207
RMON and Your Switch
207
RMON and Your
Switch
Your Switch contains an RMON probe in its management software.
details the RMON support provided by this probe.
When using the RMON features of the Switch, you should note the
following:
■
After the default sessions are created, they have no special status. You
can delete or change them as required.
■
The Switch can forward a very large volume of packets per second.
The Statistics RMON group is able to monitor every packet, but the
other groups sample a maximum of 200,000 packets a second.
■
The greater the number of RMON sessions, the greater the burden on
the management resources of the Switch. If you have many RMON
Table 10 RMON support supplied by the Switch
RMON group
Support supplied by the Switch
Statistics
A new or initialized Switch has one Statistics session per port.
History
A new or initialized Switch has two History sessions per port. These
sessions provide the data for the unit and port graphs of the web
interface:
■
30 second intervals, 10 historical samples stored
■
30 minute intervals, 10 historical samples stored
Alarms
Although up to 200 alarms can be defined for the Switch, a new
or initialized Switch has two alarms defined for each port:
■
Broadcast bandwidth used
■
Percentage of errors over one minute
You can modify these alarms using an RMON management
application, but you cannot create or delete them.
For more information about the alarms setup on the Switch, see
.
Hosts
Although Hosts is supported by the Switch, there are no Hosts
sessions defined on a new or initialized Switch.
Hosts Top N
Although Hosts Top N is supported by the Switch, there are no
Hosts Top N sessions defined on a new or initialized Switch.
Matrix
Although Matrix is supported by the Switch, there are no Matrix
sessions defined on a new or initialized Switch.
Events
A new or initialized Switch has events defined for use with the
default alarm system, see
on
for more information.