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NET-CONT.HPE
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1994-02-17
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Net-Control Version 4.1
=======================
Copyright by: RzK D.Koepke
PO Box 1200
All rights D-53563 Asbach Ww
reserved! Phone 49 2683 4547
FAX 49 2683 4537
Net-Control is a DOS program. It is a tool to keep track of the traffic
in Ethernet LANs.
- Net-Control gives an overview of the actual behavior of the network.
- It allows to recognize problems early.
- It stores data to allow analysis after a network-crash.
- It makes you aware of ongoing changes, even if they are small.
- It stores and presents daily station- and group-statistics.
- It helps to identify "unknown stations" on the network.
- Bigger LANs can be completely monitored by distributed equipment.
- Net-Control allows remote maintenance and diagnostic.
The program is used by various firms and universities since 1986. Many
ideas of the users and many experiences in fault finding have been
integrated into the program during the years. The Version 4.1 now is
the most recent one.
Net-Control for the packet driver interface:
Net-Control 4.1 differs from all earlier versions in one point. Now it
is possible to run Net-Control without an Ethernet Box. The Ethernet
Box normally is used as an ethernet statistic probe for Net-Control.
The Ethernet Box gathers all statistical data and measures load, errors
and collisions by hardware. We of course encourage every serious user
of Net-Control to buy an Ethernet Box, but however since version 4.1,
Net-Control can run on an ordinary "Packet Driver".
Of course this usage is restricted by the hardware of the standard
ethernet card and the efficience of the packet driver in use. Due to
this hardware limitations it is not possible to analyse a network with
very high netload correctly. The packet driver is programmed to receive
all packets on the network and so a slow machine monitoring a network
with high netload may "hang up". This drawback is eliminated completely
if an Ethernet Boxed is used for gathering the data.
If you use a packet driver for Net-Control, so every other application
has to release the driver before starting Net-Control.
We have choosen the packet driver interface instead of ODI, because
we dont know any ODI driver which supports the promiscous mode (enabling
the receiving of all packets).
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Usage of Net-Control:
- Ethernet networkmanagement-functions on ISO layers 1 and 2.
- Collecting and controlling of statistical data even for long
periods of time.
Requirements:
- IBM compatible (286 or higher) system with at least 512 kb free
memory and harddisk, DOS operating system,
- RS232 or parallel interface connected to an Ethernet Box or
an ethernet board with packet driver interface,
Features of Net-Control:
- Divides the data in userselectable intervals of time
(15 seconds to 24 hours).
- Manages up to 1800 ethernet hardwareaddresses.
- Automatical "learning" of new addresses.
- Accumulates the sums of received and sent packets
for each address and day.
- Calculates for each address the maximum loadindex (a value
in a logarithmic scale which describes the maximum percentage
of absolute netload).
- Stores the time of first and last occurence (sending a packet)
for each day and each address.
- Measuring and controlling and recording of the following
network parameters:
- netload in percent,
- transmitted kBytes per second,
- transitions per second (Ethernet Box only)
- packets per second,
- collisions per second (Ethernet Box only),
- distribution of packetlengths with average packetlength,
- number of: - active stations,
- connections between two ethernet stations
with packet flow in both directions,
- connections with data exchange only in one
direction (one-sided connection),
- stations sending broadcasts,
- stations sending multicasts,
- all received packets,
- broadcast packets,
- multicast packets ...
in the whole interval.
- Possibility of graphic presentation of the actual
network parameters (bargraphs).
- Assigning of up to three different groups (classifications)
to each address.
For example: group classification I for different protocols,
classification II for different buildings and III for
different workgroups in your company.
Each classification may have up to 40 different groups. (That
means for this example: max. 40 protocols, max. 40 buildings
and max. 40 workgroups in this network.
With the group classification and assignment of addresses to
the individual groups it is possible to answer questions as:
- "Which building exchanges how many packets with another one?"
- "Which work group is responsible for most of the packets?"
- Hitlists:
Net-Control shows various hitlists for the last intervals.
These hitlists store the "top ten" for different categories:
- the ten stations sending most packets,
- the ten stations sending most broadcasts,
- the ten manufacturer groups (defined by the first three
bytes of the ethernetaddress) sending most packets,
- the ten connections, which exchanged most packets,
- the ten connections with packets going only in one
directions, which exchanged most packets and
- the ten time intervalls of the day with highest netload,
- the ten connections between whole groups (for each
classification I-III) where most packets werse sent,
- the ten unknown stations sending most packets,
- the ten unknown stations sending most broadcasts,
- the ten connections, with at least one unknown address,
which exchanged most packets and
- the ten one-sided connections with at least one unknown
address.
- Monitoring:
It is possible to define threshholds (upper and lower) for the
various network parameters. If the measured value is out of
these boundaries Net-Control marks this value on the screen.
It is selectable for each alarm, if an additional logmessage
should be written and an acoustic alarm should be raised.
Additionally the hitlists may be stored for an alarm for having
an exact description of that point in time, when the alarm happened.
Alarm can be written to printer too.
- Recording of data:
Net-Control is able to store data for the period of one year. If there
is not enough storage capacity on the hard disk, old data can be deleted
automatically. Presentation and storing of data can be done
simultaniously. This guarantees non-stop recording.
Extensions for larger networks:
- Ethernet Boxes as Pulsars:
With one Ethernet Box connected to each segment of the
network it is possible to control the netload, errorrate
and collisionrate of each segment (even if the segment is
only accessible over a bridge). Net-Control is able to control
the data from up to 40 directly. These remote Ethernet Boxes
sending statistical informations to the central Net-Control
node are called Pulsars.
- Distributed Net-Recorders:
If that information based only on these three general
parameters is not sufficient, you can distribute Net-Recorders
(that are PCs running Net-Control) over the network and control
them remotely via the network or via outband serial lines.
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Registration of Net-Control:
You may install this Net-Control version on any PC and you may
copy and distribute the original diskettes or distribution files, as long
as you do not change the program, datafiles and copyright no