3Com corebuilder 3500 Implementation Manual page 555

Remote Monitoring (RMON) 555
Network-Layer Matrix Group
The nlMatrix group gathers statistics about pairs of hosts based on
network-layer address. (The RMON-1 matrix group gathers statistics
based on MAC address.)
This group features two control tables and three data tables. One control
table and its data tables collect matrix statistics; the other control table
and its data table collect TopN statistics (reports describing hosts that top
a list).
Application-Layer Host Group
The alHost group gathers statistics about IP packets over a monitored
port based on their protocol. (The RMON-2 network-layer matrix group
gathers statistics based on the network address.)
This group features a host data table.
Application-Layer Matrix Group
The alMatrix group gathers statistics about pairs of hosts conversing over
a monitored port based on protocol. (The RMON-2 network-layer matrix
group gathers statistics based on the network address.)
This group features one control table and three data tables. The alMatrix
SD and alMatrix DS tables monitor traffic flows per conversation over
monitored ports. The control table and its data table collect TopN
statistics (reports describing hosts that top a list).
Probe Configuration Group Capabilities
The probeConfig group outlines a standard set of configuration
parameters for RMON probes. Currently, your system supports one object
in the probeConfig group, the probeCapabilities object. The function of
this object is to identify the RMON groups that the probe supports.