
Configuring SNMP, RMON, BootP, DHCP, and RARP Services
2-14 117362-A Rev. A
The history function records periodic statistical samples from Ethernet networks,
for example, interval start time and number of packets. This function places the
statistical samples in the etherHistoryTable.
Host Group
The host group identifies hosts on the network by recording the source and
destination MAC addresses in good packets, and places the information in the
hostTable. This group also records the time it discovered a host on the network in
the hostTimeTable. The hostControlTable specifies control parameters such as
which monitoring operations the Ethernet DCM performs, and contains some
information about the monitoring process.
HostTopN Group
The HostTopN group ranks hosts according to a statistic type. For example, you
might want to rank the hosts by the number of errors they generate. Control
parameters for this group appear in the hostTopNControlTable, and data this
group generates appears in the hostTopNTable. To use the HostTopN group, you
must set up the host group.
Matrix Group
The matrix group stores statistics for an interchange between hosts at different
addresses. This group’s control parameters, such as number of hosts, appear in the
matrixControlTable. When the matrix group receives information from a good
packet, it places data in both the matrixSDTable and the matrixDSTable.
Filter Group
The filter group specifies the types of packets the Ethernet DCM can capture.
Filter control parameters, such as the minimum length of those packets, appear in
the filterTable. Associated with each filter is a channel (a specific path along
which data flows). Control parameters in the channelTable define how and where
the filtered packets flow.
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