IBM 8271 Nways F12 User Manual page 133

What is RMON? 7-3
Alarms
The Alarms group provides a versatile, general mechanism for setting
thresholds and sampling intervals to generate events on any RMON
variable. Both rising and falling thresholds are supported, and
thresholds can be on the absolute value of a variable or its delta value.
In addition, alarm thresholds may be autocalibrated or set manually.
Alarms are used to inform you of a network performance problem and
they can trigger automated action responses through the Events group.
Hosts
The Hosts group specifies a table of traffic and error statistics for each
host on a LAN segment. Statistics include packets sent and received,
octets sent and received, as well as broadcasts, multicasts, and error
packets sent.
The group supplies a simple discovery mechanism listing all hosts that
have transmitted. The next group, Hosts Top N, requires
implementation of the Hosts group.
Hosts Top N
The Hosts Top N group extends the Hosts table by providing sorted host
statistics, such as the top 20 nodes sending packets or an ordered list
of all nodes according to the errors they sent over the last 24 hours.
Matrix
The Matrix group shows the amount of traffic and number of errors
between pairs of devices on a LAN segment. For each pair, the Matrix
group maintains counters of the number of packets, number of octets,
and error packets between the nodes.
The conversation matrix helps you to examine network statistics in
more detail to discover who is talking to whom or if a particular PC is
producing more errors when communicating with its file server, for
example. Combined with Hosts Top N, this allows you to view the
busiest hosts and their primary conversation partners.
Filter
The Filter group provides a mechanism to instruct the RMON probe to
capture packets that match a specific criterion or condition. The group
is not supported in this release of software.