Avaya Configuring SNMP, RMON, BOOTP, DHCP, and RARP Services Uživatelský manuál Strana 46

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Configuring SNMP, RMON, BOOTP, DHCP, and RARP Services
2-14 114070 Rev. B
History Group
The History group contains a control and data collection function. The control
function manages the periodic statistical sampling of data from networks and
specifies control parameters, such as the frequency of data sampling, in the
historyControlTable.
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 what type of packets the Ethernet DCM should capture.
Filter control parameters, such as the minimum length of the packets to capture,
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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