Background: Know: Host table, Top Talkers, NMS, Host group, control and data tables, Prerequisites - link layer address, Recognize: RMON2
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hostTopN[]
The hostTopN group maintains statistics that describe the hosts that top an ordered list based on some parameter in the host table, e.g. the "top talkers". These statistics, derived from data in the host group, are organized into reports where a report is the set of statistics for one host group object on one interface, or sub-network, collected during one sampling period. Each report contains the results for one variable and that variable represents the amount of change in a host group object over the sampling interval; thus, these statistics are rate based.
HostTopNControl Table[]
Rows in hostTopNControlTable define a top-N report prepared for an interface or sub-network. The objects in this table are shown in figure and listed in table below.
Figure: Structure of hostTopNControlTable
Table: Descriptions of hostTopNControlTable Objects
Sub-OID |
Object |
Description |
(1) |
hostTopNControlIndex |
Index that uniquely identifies a row in the hostControlTable and so defines one top-N report prepared for one interface. |
(2) |
hostTopNHostIndex |
Represents host table entry that matches a value ofhostControlIndex and hostIndex and therefore specifies a particular sub-network. |
(3) |
hostTopNRateBase |
Specifies one of seven variables from hostTable and so defines which parameter to assess in the top-N report. |
(4) |
hostTopNTimeRemaining |
Number of seconds left in the sampling interval for the report currently being generated; when this entry decrements to zero, the report becomes available. |
(5) |
hostTopNDuration |
Sampling interval in seconds for this report. |
(6) |
hostTopNRequestedSize |
Maximum number of hosts requested for the top-N table for this report. |
(7) |
hostTopNGrantedSize |
Maximum number of hosts in the top-N table for this report. |
(8) |
hostTopNStartTime |
Value of sysUpTime when this top-N report was last started. |
(9) |
hostTopNOwner |
Owner of this entry. |
(10) |
hostTopNStatus |
Status of this entry. |
Example: hostTopNRateBase
HostTopN Table[]
hostTopNTablecontains the report data, that is, the set of statistics for one host group object on one interface or sub network collected during one sampling interval. The objects in this table are shown in figure and listed in table below
Figure: Structure of hostTopNTable
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Table: Descriptions of hostTopNTable Objects
Sub-OID |
Object |
Description |
(1) |
hostTopNReport |
Identifies the top-N report of which this entry is a part. |
(2) |
hostTopNIndex |
Index that uniquely identifies a row among all data rows associated with this report. |
(3) |
hostTopNAddress |
MAC address of this host. |
(4) |
hostTopNRate |
Amount of change in the selected variable during this sampling interval; the selected variable is this host’s instance of the object selected byhostTopNRateBase. |
See also[]
Applications of hostTopN / Top Talkers