ERAMON Performance-Management (EPM) · ERAMON Performance Management (EPM) 7 7 The following...

ERAMON Performance Management (EPM) 2

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Contents

1 General ............................................................................................................................................................... 3

2 Realization in ERAMON ..................................................................................................................................... 3

3 Display in ERAMON ........................................................................................................................................... 5


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1 General

ERAMON’s Performance Management Module (EPM) collects data from different from network com-

ponents or servers, and their ports. The data is then being prepared graphically for information and

analysis purposes.

The aim is to improve performance and status assessments of devices and to display any relevant infor-

mation relating to these errors and their interfaces clearly. Thus EPM supports tasks such as the planning

of WAN-connections or file server capacities by recording traffic flow and storage volume values and

reporting any violations of threshold levels predefined in ERAMON’s event system. This enables the relia-

ble recording of short-term capacity patterns and an identification of long-term trends, which in turn

allows expansion measures to be carried out in good time.

In addition to this, the quality of services rendered may be monitored and documented. EPM provides a

considerable extension of the possibilities to display operational data currently available in the market.

Scalability to the granularity level required by the user allows better handling as well as more accurate

analysis.

2 Realization in ERAMON

EPM can be set up independent of manufacturer for any device of a device type, for ERAMON device

groups or individual devices, e.g. all switches of type Cisco Catalyst 4506. The required information is

polled in pre-defined intervals through satellites via SNMP variables of manufacturer MIBs. A large num-

ber of MIBs are already integrated in ERAMON. New MIBs can be added at any time though. A sepa-

rate data base is available for storage as well as archiving of the collected data.

EPM information can be retrieved from two different locations within the device overview (for devices

and ports) on the systems:


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Depending on the number of active satellites (SATs) installed, ERAMON’s scalable client/server architec-

ture (SAT/CENTER) allows an almost infinite amount of systems data to be accessed. The type of data to

be monitored depends on the MIBs of the device manufacturers and spans from ATM Soft-PVCs to

switch buffers. Depending on operating system used by the devices, 32-bit- or 64-bit-information can be

polled.

EPM is configured using templates which can be rolled out accordingly. The requested information is

either displayed historically in a graph or as the actual current value. It is also possible to specify thresh-

old values for alerts, as well as minimum/maximum values to improve the clarity of the display.

For templates and measurements we differentiate between device and port monitoring:

Graphs with identical graph numbers are displayed in one window.

In the graph administration you can collate several measurements. This allows the pooling of port statis-

tics for IN/OUT-octets for several devices.


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3 Display in ERAMON

The display of EPM information happens primarily on the device overview page. Depending on what

was selected – device or port-statistics – a popup opens showing the corresponding statistics. All re-

quested data will be shown grouped together in miniature graphs. Any time periods can be displayed.

The mouseover function shows individual values immediately. It goes without saying that the graphs can

be exported in a variety of formats (e.g. CSV, pdf, png).


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Should you want to view particular values in more detail, you can view the graph in question in its own

window by clicking on the EPM icon.


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The following functions are available via the detailed view:

95% Rule

The 95% average is shown.

Trend Analysis

The trend analysis applies the exponential smoothing method with a smoothing factor of 0.3 to

approximate the curve. The curve is then displayed using linear regression.

Forecast Value

The forecast extrapolates the values from the linear regression to the selected time period. The

system uses data from the measurements during the displayed time period as the basis for these

calculations.

Even more detailed scaling can be achieved by marking a particular section of the graph with the

mouse, which is then displayed in zoom mode.

Where several graphs have been created with the help of the graph administration function, these

graph combinations will be displayed in the view administration menu. It is here where the various indi-

vidual graphs are put together into one graphic display, where the individual values are differentiate

through different colors.


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If you would like to view a particular value in more detail, you can view it in full-screen mode.

Here also, even more detailed scaling is possible by using your mouse to mark the required area of the

graph’s data which will then be enlarged.


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In special circumstances it is possible to overwrite the settings of an individual measurement. This applies

to device as well as port statistics, enabling the setting of a threshold level different to the one specified

in the original template for a particular device/port.

As you can see in the graphic display above, based on a device or port, individual measurements can

be edited separately.


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The following EPM measurements are possible:

EPM:SNMP:Polling OID polling

EPM:SNMP:List List request

EPM:Ping fPing test

EPM:Script Measurements polled via external script

EPM:QOS Polling of Cisco QOS table

EPM:BGP:IN Polling of Cisco BGP router

For Cisco:

EPM:SAA:JIT:RTT RoundTripTime

EPM:SAA:JIT:SD+DS Positive Jitter Source:Destination + Destination:Source

EPM:SAA:JIT:SD Source:Destination Jitter

EPM:SAA:JIT:SD- Negative Jitter Source->Destination

EPM:SAA:JIT:DS+ Positive Jitter Destination->Source

EPM:SAA:JIT:DS- Negative Jitter Destination->Source

EPM:SAA:JIT:DS Destination:Source Jitter

EPM:SAA:JIT:PLSD Packet Lost Source:Destination

EPM:SAA:JIT:PLDS Packet Lost Destination:Source

EPM:SAA:SD+ Positive Jitter Source->Destination

EPM:SAA:JIT:LATE Packets late arrival

EPM:SAA:JIT:MIA Packets missing in action

EPM:SAA:JIT:SEQ Packets out of Sequence

EPM:SAA:JIT:COMPL Number of successful polls

EPM:SAA:JIT:ERROR Number of internal errors

EPM:SAA:JIT:MOSMIN Jitter minimum of MOS

EPM:SAA:JIT:MOSMAX Jitter maximum of MOS

EPM:SAA:ECHO Echo measurement

EPM:SAA: ECHO2

For Juniper

EPM:RPM:RTT RoundTripTime

EPM:RPM:RTT_JIT rttJitter

EPM:RPM:RTT_IJIT rttInterarrivalJitter

EPM:RPM:EGRESS egress

EPM:RPM:EGRESS_JIT egressJitter

EPM:RPM:EGRESS_IJIT egressInterarrivalJitter

EPM:RPM:INGRESS ingress

EPM:RPM:INGRESS_JIT ingressJitter

EPM:RPM:INGRESS_IJIT ingressInterarrivalJitter

For Huawei:

EPM:NQA:JIT:RTT_AVG RoundTripTime (AVG)

EPM:NQA:JIT:RTT_MIN RoundTripTime (min.)

EPM:NQA:JIT:RTT_MAX RoundTripTime (max.)

EPM:NQA:JIT:PL Packet Loss

EPM:NQA:JIT:OUT OUT

EPM:NQA:JIT:IN IN

EPM:NQA:JIT:MOS MOS

® ERAMON is the registered trademark of ERAMON GmbH.

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