RMON Features of the Dual Speed Hub 500 125One other problem with stand-alone RMON probes is that they arepassive; able to monitor and report, but nothing more. Placing probefunctionality inside the network device allows integration of RMONwith normal device management to allow proactive management.As an example, statistics can be related to the segments and the unitcan take autonomous actions such as disabling a port on a segment(temporarily or permanently) if errors on that segment exceed apre-defined threshold.RMON Features of the Dual Speed Hub 500All nine groups of RMON are supported fully for 10Mbps and100Mbps segments.If you have a Dual Speed Hub 500 with a serial number less than0600/00000000000, upgrading the software to version 2.1x orabove will not give you support for the RMON Filter and Capturegroups on the 100Mbps segments, which means that you cannotperform RMON Filter Capture for the 100Mbps segments.Table 11 details the RMON support provided by the unit.Table 11 RMON Support Provided by the UnitRMON Group Support supplied by the unitStatistics One default session per segment. All segments andcounters are supported.History Two default sessions per segment: 30 second intervals, 120 historical samples stored 1800 second intervals, 96 historical samples storedAlarms No default sessions created. Maximum of 200 alarms perunit.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.
