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Background: Know: Host table, Top Talkers, NMS, Host groupcontrol and data tables, Prerequisites - link layer address, Recognize: RMON2

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hostTopN Edit

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 TableEdit

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

Graphic10299

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

HostTopNRateBase

HostTopN TableEdit

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


2

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 alsoEdit

Applications of hostTopN / Top Talkers

Corresponding TELE9752 lecture slide

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